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Nubira-Lacetti
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SECTION

COMPONENT LOCATOR

Transaxle Identification Information


V3B35A17
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  1. Part Number
  2. Serial Number
  3. Model Code
  4. Manufactured Nation and Company

Torque Converter


V3B35A18
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  1. Torque Converter Housing
  2. Torque Converter
  3. Torque Converter Gasket
  4. Steel Gasket
  5. Oil Baffle Plate
  6. Bolt
  7. Magnet
  8. Oil Filter
  9. O-ring
  10. Screw
  11. Pressure Plug
  12. Pressure Plug
  13. Oil Drain Plug
  14. Oil Level Plug
  15. Screw
  16. Bolt
  17. Bolt

Transaxle Housing


V3B35A19
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  1. Transaxle Housing
  2. Bushing
  3. Shaft Seal
  4. Axle Shaft Seal
  5. Sealing Sleeve
  6. Breather Pipe
  7. Sleeve Protector
  8. Type Plate
  9. Cable Terminal
  10. Output Speed Sensor
  11. Washer
  12. Bolt
  13. Shim
  14. Shim
  15. Park/Neutral Position Switch
  16. Bolt
  17. Sealing sleeve

Oil Pump


V3B35A20
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  1. Oil Pump
  2. Oil Pump Seal
  3. Washer
  4. O-ring
  5. Dowel Pin
  6. Bolt
  7. Bolt

Rear Cover & Oil Pan Cover


V3B35A21
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  1. Rear Cover
  2. Piston Ring
  3. O-ring
  4. Needle Bearing
  5. Shim
  6. Screw Plug
  7. Bolt
  8. Oil Pan
  9. Oil Pan Gasket
  10. Oil Pan Bracket
  11. Bolt

Parking Lever


V3B35A22
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  1. Selector Shaft
  2. Stop Bushing
  3. Detent Disc
  4. Clamping Sleeve
  5. Connecting Bar
  6. Leg Spring
  7. Pawl
  8. Pin
  9. Support Bolt

Input Shaft & Shift Gear


V3B35A23
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  1. Inner Disc Carrier F
  2. Clutch Plate F
  3. Line Clutch Disc F
  4. Clutch Outer Disc F
  5. Spring Disc
  6. Stop Ring
  7. Cup Spring
  8. O-ring
  9. O-ring
  10. Piston D
  11. Slotted Nut
  12. Roller Bearing
  13. Adjust Ring
  14. Bearing Plate
  15. Roller Bearing
  16. Spur Gear
  17. Piston D
  18. Spring Disc
  19. Snap Ring
  20. Clutch Plate D
  21. Cup Spring
  22. Line Clutch Disc D
  23. Spring Disc
  24. Disc Carrier C/D
  25. Pitting Key
  26. Line Clutch Disc C
  27. Clutch Outer Disc C
  28. Cup Spring
  29. Line Clutch Disc C
  30. Snap Ring
  31. Piston C
  32. Cylinder C
  33. Snap Ring
  34. Front Ring Gear
  35. Oil Tray
  36. Front Planetary Gear
  37. Front Sun Gear
  38. Snap Ring
  39. Needle Bearing
  40. Rear Planetary Gear Set
  41. Snap Ring
  42. Rear Sun Gear
  43. Needle Bearing
  44. Snap Ring
  45. Piston B
  46. Clutch Plate B
  47. Clutch Outer Disc B
  48. Line Clutch Disc B
  49. Spring Disc
  50. Piston Ring
  51. Inner Disc Carrier E
  52. Needle Bearing
  53. Snap Ring
  54. Clutch Plate Disc E
  55. Line Clutch Disc E
  56. Clutch Outer Disc E
  57. Spring Disc
  58. Retainer Ring
  59. O-ring
  60. Oil Dam
  61. Cup Spring
  62. O-ring
  63. Piston E
  64. O-ring
  65. Input Shaft
  66. O-ring
  67. O-ring
  68. Piston
  69. Oil Dam
  70. O-ring
  71. Cup Spring
  72. Stop Ring
  73. Shim
  74. Needle Bearing
  75. O-ring
  76. Piston Ring
  77. Rear Cover

Valve Body


V3B35A24
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  1. Control Valve Body
  2. Valve Body Wiring Harness
  3. O-ring
  4. Plug
  5. Cable Terminal
  6. Retaining Clip
  7. Input Speed Sensor
  8. Cap Screw
  9. Solenoid Valve
  10. Cap Screw
  11. Fixing Plate
  12. Fixing Plate
  13. Cap Screw
  14. Solenoid Valve
  15. Solenoid Valve

Gear Shift Control


J3B15A34
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  1. Selector Control Lever
  2. Gear Shift Knob
  3. Cover
  4. Step Gate Slider
  5. BTSI Button
  6. Spring
  7. Positioning Spring
  8. Solenoid
  9. Base Plate
  10. T/A Lever
  11. Select Cable
  12. Cable Fastener

DIAGNOSTIC INFORMATION AND PROCEDURES DIAGNOSIS

Basic Knowledge Required

You must be familiar with some basic electronics to use this section of the Service Manual. They will help you to follow diagnostic procedures.

Notice : Lack of the basic knowledge of this transaxle when performing diagnostic procedures could result in incorrect diagnostic performance or damage to transaxle components.

Do not, under any circumstances, attempt to diagnose a transaxle problem without this basic knowledge.

Notice : If a wire is probed with a sharp instrument and not properly sealed afterward, the wire will corrode and an open circuit will result.

Diagnostic test probes are now available that allow you to probe individual wires without leaving the wire open to the environment. These probe devices are inexpensive and easy to install, and they permanently seal the wire from corrosion.

Special Tools

You should be able to use a Digital Volt Meter (DVM), a circuit tester, jumper wires or leads and a line pressure gauge set.
The functional check procedure is designed to verify the correct operation of electronic components in the transaxle.
This will eliminate the unnecessary removal of transaxle components.

Functional Check Procedure

Begin with the Functional Check Procedure which provides a general outline of how to diagnose automatic transaxle. The following functional check procedure will indicate the proper path of diagnosing the transaxle by describing the basic checks and then referencing the locations of the specific checks.

Line Pressure Check Procedure

The 4HP 16 A/T uses a trochoid type oil pump to produce hydraulic pressure, and a pressure control solenoid (solenoid 1) to control that pressure at the pressure regulator valve, after it leaves the pump. The transaxle pressure control solenoid is controlled by an electrical signal that ranges from 0 to 12 volts corresponds to minimum line pressure (approx. 89.9 to 124.7 psi (6.2 to 8.6 bar)) and 0 volt corresponds to a maximum line pressure (approx. 221.9 to 252.4 psi (15.3 to 17.4 bar)) in all range.
Line pressures are calculated for two sets of gear ranges - Drive-Park-Neutral and Reverse. This allow the transaxle line pressure to be appropriate for different pressure needs in different gear ranges:
Gear
Range
Solenoid 1
RPM
Pressure
Drive,
Reverse
Off
2,500
221.9~252.4psi
(15.3~17.4 bar)
On
2,500
17.4~269.8psi
(1.2~18.6 bar)
Neutral,
Park
Off
2,500
221.9~252.4psi
(15.3~17.4 bar)
On
2,500
89.9~269.8 psi
(6.2~18.6 bar)
Before performing a line pressure check, verify that the pressure control solenoid is receiving the correct electrical signal from the TCM:
  1. Install a scan tool.
  2. Start the engine and set parking brake.
  3. Check for a stored pressure control solenoid diagnostic trouble code, and other diagnostic trouble codes.
  4. Repair vehicle, if necessary.
Inspect:
Install or Connect:

V3B35A26
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  1. Put gear selector in Park and set the parking brake.
  2. Start engine and allow it to warm up at idle.
  3. Access the "Solenoid 1 Control Mode" on the scanner.
  4. Switching solenoid 1 ON/OFF, accelerating the engine to 2,500rpm, and then read the line pressure at the each gear.
  5. Compare data to the Drive-Park-Neutral line pressure chart below.

Notice : Total test running time should not exceed 2 minutes, or transaxle damage could occur.

Caution : Brake must be applied at all times to prevent unexpected vehicle motion.

If pressure readings differ greatly from the line pressure chart, refer to the Diagnosis Charts contained in this section.

Notice : Clutch damage may occur.

The scanner is only able to control the pressure control solenoid in Park and Neutral with the vehicle stopped.
This protects the clutches from extremely high or low pressures in Drive or Reverse rang.
Gear Range
Solenoid
Line Pressure
B Port
E Port
Park / Neutral
ON
LOW
90~124.7 psi (6.2~8.6 bar)
.
OFF
HIGH
221.9~252.3 psi (15.3~17.4 bar)
.
Reverse
ON
LOW
90~124.7 psi (6.2~8.6 bar)
.
OFF
HIGH
221.9~252.3 psi (15.3~17.4 bar)
.
Drive
ON
LOW
.
90~124.7 psi (6.2~8.6 bar)
OFF
HIGH
.
137.7~162.4 psi (9.5~11.2 bar)
3
ON
LOW
90~124.7 psi (6.2~8.6 bar)
90~124.7 psi (6.2~8.6 bar)
OFF
HIGH
221.9~252.3 psi (15.3~17.4 bar)
137.7~162.4 psi (9.5~11.2 bar)
2
ON
LOW
.
90~124.7 psi (6.2~8.6 bar)
OFF
HIGH
.
137.7~162.4 psi (9.5~11.2 bar)
1
ON
LOW
90~124.7 psi (6.2~8.6 bar)
.
OFF
HIGH
221.9~252.3 psi (15.3~17.4 bar)
.

Clutch Plate Diagnosis

Composition Plates

Dry the plate and inspect the plates for the following conditions :
Chips or metal particles embedded in the lining
Replace a composition plate which shows any of these conditions.

Steel Plates

Wipe the plates dry and check the plates for heat discoloration. If the surfaces are smooth, even if colorsmear is indicated, you can reuse the plate. If the plate is discolored with hot spots or if the surface is scuffed, replace the plate.

Important : If the clutch shows evidence or extreme heat or burning, replace the springs.

Causes of Burned Clutch Plates

The following conditions can result in a burned clutch plate:
- The valve body face is not flat
- Porosity between channels
- The valve bushing clips are improperly installed.
- The check balls are misplaced.

Engine Coolant in Transaxle

Notice : Antifreeze will deteriorate the O-ring seals and the glue used to bond the clutch material to the pressure plate. Both conditions may cause transaxle damage.

Perform the following steps if the transaxle oil cooler has developed a leak, allowing engine coolant to enter the transaxle:
  1. Because the coolant will attach to the seal material causing leakage, disassemble the transaxle and replace all rubber type seals.
  2. Because the facing material may become separated from the steel center portion, replace the composition faced clutch plate assemblies.
  3. Replace all nylon parts including washers.
  4. Replace the torque converter.
  5. Thoroughly clean and rebuild the transaxle, using new gaskets and oil filter.
  6. Flush the cooler lines after you have properly repaired or replaced the transaxle.

Cooler Flushing and Flow Test

Notice : You must flush the cooler whenever you receive a transaxle for service. Cooler flushing is essential for SRTA installation, major overhaul, whenever you replace a pump or torque converter, or whenever you suspect that the fluid has been contaminated.

After filling the transaxle with fluid, start the engine and run for 30 seconds. This will remove any residual moisture from the oil cooler. Disconnect the return line at the transaxle and observe the flow with the engine running. If the fluid flow is insufficient, check the fluid flow by disconnecting the feed line at the cooler. Observe the flow with the engine running.

Transaxle Fluid Level Service Procedure

This procedure is to be used when checking a concern with the fluid level in a vehicle. A low fluid level will result in slipping and loss of drive/ reverse or delay on engagement of drive/ reverse when the vehicle is cold.
The vehicle is first checked for transaxle diagnostic messages on the scan tool. If the oil level is low, it is possible to register a vehicle speed signal fault.
The vehicle is to be test driven to determine if there is an abnormal delay when selecting drive or reverse, or loss of drive. One symptom of low fluid level is a momentary loss of drive when driving the vehicle around a corner. Also when the transaxle fluid level is low, a loss of drive may occur when the transaxle fluid temperature is low.
When adding or changing transaxle fluid use only ESSO LT 71141 or TOTAL ATF H50235. The use of incorrect fluid will cause the performance and durability of the transaxle to be severely degraded.

Fluid Level Diagnosis Procedure

  1. If the vehicle is at operating temperature allow the vehicle to cool down for two hours, but no greater than four hours. Or if the vehicle is at cool status, start the engine and allow the engine to idle for approximately 5 minutes (825~875 rpm), if possible, drive the vehicle for a few kilometers (N-D, N-R, shift until two gear). This will allow the transaxle to be within the correct temperature range. Transaxle fluid level should be checked at temperature 20 to 45°C (68 to 113°F).

Caution : Removal of the fluid filler plug when the transaxle fluid is hot may cause injury if fluid drains from the filler hole.

  1. Switch off accessories, especially air conditioner, heater.
  2. With the brake pedal pressed, move the gear shift control lever through the gear ranges, pausing a few seconds in each range. Return the gearshift lever to P(Park). Turn the engine OFF.
  3. Park the vehicle on a hoist, inspection pit or similar raised level surface. The vehicle must be level to obtain a correct fluid level measurement.
  4. Place a fluid container below the fluid filler plug.
  5. Clean all dirt from around the fluid filler plug.
Remove the fluid filler plug. Clean the filler plug and check that there is no damage to the "O" ring.
  1. When the fluid level checking procedure is completed, wipe any fluid around the filler plug with a rag or shop towel.

Fluid Level Set After Service

  1. Depending on the service procedure performed, add the following amounts of fluid through the filler plug hole prior to adjusting the fluid level:
  2. Oil pan removal - 4 liters (4.23 quarts)
    Converter removal - 2 liters ( 2.11 quarts)
    Overhaul - 6.9 ± 0.2 liters (7.3 ± 0.2 quarts)
    Oil drain plug removal - 4 liters (4.23 quarts)
  3. Follow steps 1 through 4 of the Fluid Level Diagnosis Procedure.
  4. Clean all dirt from around the fluid filler plug.
Remove the fluid filler plug. Clean the filler plug and check that there is no damage to the "O" ring.
  1. Lower the vehicle with the filler plug still removed and start the vehicle in P(Park) with the parking brake and the brake applied. With the engine idling, move the gear shift lever through the gear ranges, pausing a few seconds in each range and adding the fluid until gear application is felt. Then add an additional 0.5 liters of fluid. Return the gear shift lever to P(Park). Turn the engine OFF and raise the vehicle. Install the fluid filler plug and tighten it to 45N•m (34 lb-ft).
  2. Drive the vehicle at 2.2 miles(3.5km) to 2.8 miles(4.5 km) with light throttle so that the engine does not exceed 2500 rpm. This should result in the transaxle temperature being in the range 20 to 45°C (68 to 11°F). With the brake applied, move the shift lever through the gear ranges, pausing a few seconds in each range at the engine idling.
  3. Return the gear shift lever to P(Park). Turn the engine OFF and raise the vehicle on the hoist, if applicable, ensuring the vehicle is level. When the three minutes passed after the engine stopped, remove the filler plug. Check if the fluid level is aligned with the bottom of the filler hole. If not, add a small quantity of fluid to the correct level. Install the fluid filler plug and tighten it to 45N•m (34 lb-ft).
  4. Wipe any fluid around the filler plug with a rag or shop towel.

Fluid Leak Diagnosis and Repair

The cause of most external leaks can generally be Located and repaired with the transaxle in the vehicle.

Methods for Locating Leaks

General Method

  1. Verify that the leak is transaxle fluid.
  2. Thoroughly clean the suspected leak area.
  3. Drive the vehicle for approximately 25 km (15 miles) or until the transaxle reaches normal operating temperature (88°C, 190°F).
  4. Park the vehicle over clean paper or cardboard.
  5. Turn the engine OFF and look for fluid spots on the paper.
  6. Make the necessary repairs to correct the leak.

Powder Method

  1. Thoroughly clean the suspected leak area.
  2. Apply an aerosol type powder (foot powder) to the suspected leak area.
  3. Drive the vehicle for approximately 25 km (15 miles) or until the transaxle reaches normal operating temperature (88°C, 190°F).
  4. Turn the engine OFF.
  5. Inspect the suspected leak area and trace the leak path through the powder to find the source of the leak.
  6. Make the necessary repairs.

Dye and Black Light Method

  1. Add dye to the transaxle though the transaxle fluid filler plug. Follow the manufacturer's recommendation for the amount of dye to be used.
  2. Use the black light to find the fluid leak.
  3. Make the necessary repairs.

Repairing the Fluid Leak

Once the leak point is found the source of the leak must be determined. The following list describes the potential causes for the leak:

Electrical/Garage Shift Test

This preliminary test should be performed before a hoist or road test to make sure electronic control inputs is connected and operating. If the inputs are not checked before operating the transaxle, a simple electrical condition could be misdiagnosed as a major transaxle condition.
A scan tool provides valuable information and must be used on the automatic transaxle for accurate diagnosis.
  1. Move gear selector to P (Park) and set the parking brake.
  2. Connect scan tool to Data Link Connector (DLC) terminal.
  3. Start engine.
  4. Turn the scan tool ON.
  5. Verify that the appropriate signals are present. These signals may include:
  6. Monitor the A/C COMPRESSOR STATUS signal while pushing the A/C switch.
  7. Monitor the GEAR SHIFT LEVER POSITION signal and move the gear shift control lever through all the ranges.
  8. Move gear shift control lever to neutral and monitor the THROTTLE POSITION signal while increasing and decreasing engine speed with the accelerator pedal.

Road Test Procedure

The TCM calculates upshift points based primarily on two inputs : throttle angle and vehicle speed. When the TCM wants a shift to occur, an electrical signal is sent to the shift solenoids which in turn moves the valves to perform the upshift.
The shift speed charts reference throttle angle instead of "min throttle" or "wot" to make shift speed measurement more uniform and accurate. A scan tool should be used to monitor throttle angle. Some scan tools have been programmed to record shift point information. Check the introduction manual to see if this test is available.

Upshift Procedure

With gear selector in drive(D)
  1. Look at the shift speed chart contained in this section and choose a percent throttle angle of 10 or 25%.
  2. Set up the scan tool to monitor throttle angle and vehicle speed.
  3. Accelerate to the chosen throttle angle and hold the throttle steady.
  4. As the transaxle upshifts, note the shift speed and commanded gear changes for :

Important : Shift speeds may vary due to slight hydraulic delays responding to electronic controls. A change from the original equipment tire size affects shift speeds.

Note when TCC applies. This should occur in fourth gear. If the apply is not noticed by an rpm drop, refer to the "Lock-up Clutch Diagnosis" information contained in this section.
The Lock up clutch should not apply unless the transaxle has reached a minimum operating temperature of 8°C (46°F) TRANS TEMP AND engine coolant temp of 50°C (122°F).
  1. Repeat steps 1-4 using several different throttle angles.

Part Throttle Detent Downshift

At vehicle steeds of 55 to 65km/h (34 to 40mph) in Fourth gear, quickly increase throttle angle to greater than 50%.
Verify that :

Full Throttle Detent Downshift

At vehicle speeds of 55 to 65km/h (34 to 40mph)in Fourth gear, quickly increase throttle angle to its maximum position (100%)
Verify that :

Manual Downshifts

  1. At vehicle speeds of 60km/h (40mph)in Fourth gear, release accelerator pedal while moving gear selector to Manual Third (3). Observe that :
  2. Move gear selector back to overdrive(D) and accelerate to 31mph (50km/h). Release the accelerator pedal and move the gear selector to Manual First(1) and observe that :

Notice : A Manual First--Third Gear Ratio will occur at high speeds as an upshift safety feature. Do not attempt to perform this shift.

Coasting Downshifts

  1. With the gear selector in Overdrive(D), accelerate to Fourth gear with TCC applied.
  2. Release the accelerator pedal and lightly apply the brakes, and observe that :

Manual Gear Range Selection

Upshifts in the manual gear ranges are controlled by the shift solenoids. Perform the following tests by accelerating at 25 percent TP sensor increments.

Manual Third (3)

- 1-2 shift.
- 2-3 shift.

Manual Second (2)

- 1-2 shift.
- 2-3 shift does not occur
- TCC does not apply

Manual First (1)

- No upshifts occur

Reverse (R)

- Solenoid 1 is OFF
- Solenoid 2 is OFF
Use a scan tool to see if any transaxle trouble codes have been set. Refer to "Diagnostic Trouble Codes"in this section and repair the vehicle as directed. After repairing the vehicle, perform the hoist test and verify that the code has not set again.
If the transaxle is not performing well and no trouble codes have been set, there may be an intermittent condition. Check all electrical connections for damage or a loose fit. You also have to perform a snapshot test which can help catch an intermittent condition that dose not occur long enough to set a code.
You may want to read "Electronic Component Diagnosis" in this section to become familiar with transaxle conditions caused by transaxle electrical malfunction.
If no trouble codes have been set and the condition is suspected to be hydraulic, take the vehicle on a road test.

Torque Converter Lock-Up Clutch(TCC) Diagnosis

To properly diagnosis the lock-up clutch(TCC) system, perform all electrical testing first and then the hydraulic testing.
The TCC is applied by fluid pressure which is controlled by a solenoid Located inside the valve body. The solenoid is energized by completing an electrical circuit through a combination of switches and sensors.

Functional Check Procedure

Inspect

  1. Install a tachometer or scan tool.
  2. Operate the vehicle unit proper operating temperature is reached.
  3. Drive the vehicle at 80 to 88km/h (50 to 55 mph) with light throttle(road load).
  4. Maintaining throttle position, lightly touch the brake pedal and check for release of the TCC and a slight increase in engine speed(rpm).
  5. Release the brake slowly accelerate and check for a reapply of the Lock up clutch and a slight decrease in engine speed(rpm).

Torque Converter Evaluation

Torque Converter Stator

The torque converter stator roller clutch can have one of two different type malfunctions :
A. Stator assembly freewheels in both directions.
B. Stator assembly remains Locked up at all times.

Condition A - Poor Acceleration Low Speed

The car tends to have poor acceleration from a stand still. At speeds above 50 to 55km/h(30 to 35mph), the car may act normal. If poor acceleration is noted, it should first be determined that the exhaust system is not blocked, and the transaxle is in 1st(First) gear when starting out.
If the engine freely accelerates to high rpm in N(Neutral), it can be assumed that the engine and exhaust system are normal. Checking for poor performance in "Drive" and "Reverse" will help determine if the stator is freewheeling at all times.

Condition B - Poor Acceleration High Speed

Engine rpm and car speed limited or restricted at high speeds. Performance when accelerating from a standstill is normal. Engine may overheat. Visual examination of the converter may reveal a blue color from overheating.
If the converter has been removed, the stator roller clutch can be checked by inserting two fingers into the splined inner race of the roller clutch and trying to turn freely clockwise, but not turn or be very difficult to turn counter clockwise.

Noise

Torque converter whine is usually noticed when the vehicle is stopped and the transaxle is in "Drive" or "Reverse". The noise will increase when engine rpm is increased. The noise will stop when the vehicle is moving or when the torque converter clutch is applied because both halves of the converter are turning at the same speed.
Perform a stall test to make sure the noise is actually coming from the converter :
  1. Place foot on brake.
  2. Put gear selector in "Drive".
  3. Depress accelerator to approximately 1200rpm for no more than six seconds.

Notice : If the accelerator is depressed for more than six seconds, damage to the transaxle may occur.

A torque converter noise will increase under this load.

Important : This noise should not be confused with pump whine noise which is usually noticeable in P (Park), N (Neutral) and all other gear ranges. Pump whine will vary with pressure ranges.

The torque converter should be replaced under any of the following conditions:
The torque converter should not be replace if :

Lock-Up Clutch Shudder Diagnosis

The key to diagnosing lock-up clutch(TCC) shudder is to note when it happens and under what conditions.
TCC shudder should only occur during the APPLY and/or RELEASE of the Lock up clutch.

While TCC Is Applying Or Releasing

If the shudder occurs while TCC is applying, the problem can be within the transaxle or torque converter.
Something is not allowing the clutch to become fully engaged, not allowing clutch to release, or is trying to release and apply the clutch at the same time. This could be caused by leaking turbine shaft seals, a restricted release orifice, a distorted clutch or housing surface due to long converter bolts, or defective friction material on the TCC plate.

Shudder Occurs After TCC Has Applied :

In this case, most of the time there is nothing wrong with the transaxle! As mentioned above, once the TCC has been applied, it is very unlikely that will slip. Engine problems may go unnoticed under light throttle and load, but become noticeable after TCC apply when going up a hill or accelerating, due to the mechanical coupling between engine and transaxle.

Important : Once TCC is applied there is no torque converter assistance. Engine or driveline vibrations could be unnoticeable before TCC engagement.

Inspect the following components to avoid misdiagnosis of TCC shudder and possibly disassembling a transaxle and/or replacing a torque converter unnecessarily :

TCM Initialization Procedure

When one or more operations such as shown below are performed, all learned contents which are stored in TCM memory should be erased after the operations.
  1. Connect the Scan 100 with a DLC connector in a vehicle.
  2. Turn ignition switch ON.
  3. Turn the power on for the Scan 100.
  4. Follow the "TCM LEARNED INITIALIZE" procedure on the Scan 100 menu.
Notice : Before pushing "Yes" Button for TCM initialization on the Scan 100 screen, make sure that the condition is as follows:
Condition :
1. Engine idle.
2. Select lever set "P" range.

Shift Speed Chart

Up Shift Speed

MODEL
First-Second gear (±3.0 mph (4.8km/h))
Second-Third gear (±4.0 mph (6.4km/h))
Third-Fourth gear (±5.0 mph (8km/h))
10%
TPS
25%
TPS
50%
TPS
100%
TPS
10%
TPS
25%
TPS
50%
TPS
100%
TPS
10%
TPS
25%
TPS
50%
TPS
100%
TPS
1.8 DOHC
mph (km/h)
9 (15)
11 (18)
18 (29)
32 (52)
18 (29)
23 (37)
34 (55)
62 (99)
25 (45)
34 (55)
47 (76)
98 (157)

Down Shift Speed

MODEL
Down Shift (±4.0 mph (6.4km/h))
Lock Up Clutch Applied
(Fourth)
Lock Up Clutch Released
(Fourth)
Fourth-
Third
(Coast)
Third-
Second
(Coast)
Second-
First
(Coast)
10%
25%
10%
25%
1.8 DOHC
mph (km/h)
25 (41)
13 (21)
7 (11)
48 (77)
48 (77)
42 (68)
42 (68)

Internal Wiring Harness Check

Step Action Value(s) Yes No
1
  1. Disconnect the transaxle harness.
  2. Measure the resistance between terminals 3 and 13 of the transaxle wiring connector.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 3
Go to Step 2
2
  1. Disconnect the internal transaxle harness from the first solenoid valve.
  2. Measure the resistance of the first solenoid valve.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
3
Measure the resistance between terminals 3 and 13 the second solenoid valve.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 5
Go to Step 4
4
  1. Disconnect the internal transaxle harness from the second solenoid valve.
  2. Measure the resistance of the second solenoid valve.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
5
Measure the resistance between terminals 5 and 6 the transaxle wiring connector(EDS 3).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 7
Go to Step 6
6
  1. Disconnect the internal transaxle harness from the pressure control valve 3(EDS 3).
  2. Measure the resistance of the EDS 3.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
7
Measure the resistance between terminals 5 and 7 the transaxle wiring connector(EDS 4).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 9
Go to Step 8
8
  1. Disconnect the internal transaxle harness from the pressure control valve 4(EDS 4).
  2. Measure the resistance of the EDS 4.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
9
Measure the resistance between terminals 5 and 10 the transaxle wiring connector(EDS 5).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 11
Go to Step 10
10
  1. Disconnect the internal transaxle harness from the pressure control valve 5(EDS 5).
  2. Measure the resistance of the EDS 5.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
11
Measure the resistance between terminals 5 and 11 the transaxle wiring connector(EDS 6).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 13
Go to Step 12
12
  1. Disconnect the internal transaxle harness from the pressure control valve 6(EDS 6).
  2. Measure the resistance of the EDS 6.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
13
Measure the resistance between terminals 4 and 9 the transaxle wiring connector(transaxle temperature sensor).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 15
Go to Step 14
14
  1. Disconnect the internal transaxle harness from the transaxle temperature sensor.
  2. Measure the resistance of the transaxle temperature sensor.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
15
Measure the resistance between terminals 15 and 16 the transaxle wiring connector(transaxle input speed sensor).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 17
Go to Step 16
16
  1. Disconnect the internal transaxle harness from the transaxle input speed sensor.
  2. Measure the resistance of the input speed sensor.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
17
Measure the resistance between terminals 1 and 2 the transaxle wiring connector(transaxle output speed sensor).
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 19
Go to Step 18
18
  1. Disconnect the internal transaxle harness from the transaxle output speed sensor.
  2. Measure the resistance of the transaxle output speed sensor.
Is the resistance within the values shown?
Refer to Component Resistance Chart
Go to Step 20
Go to Step 22
19
Measure the resistance between terminals of internal wiring harness.
Is the resistance within the values shown?
Refer to Component Resistance Chart
No problem found, exit table
Go to Step 21
20
Inspect for resistance:
  • Ispect the transaxle wiring for poor electrical connections at the transaxle.
  • Look for possible bent, backed out, deformed of damaged terminals.
Check for weak terminal tension.
-
Verify repair and Go to Step 12
No problem found, exit table
21
Replace the internal wiring harness.
Is the replacement complete.
-
No problem found, exit table
-
22
Replace the component.
Is the replacement complete.
-
No problem found, exit table
-

Transaxle Wiring Harness Connector

Wiring Harness Connector


V3B35A27
Display graphicTranslations of text in graphics


Pin number
Description
1
Output Speed Sensor (+)
2
Output Speed Sensor (-)
3
Solenoid Valve (+)
4
Transmission Fluid Temperature Sensor (-)
5
Pressure Control Solenoid Valve (+)
6
Pressure Control Solenoid Valve (EDS3)
7
Pressure Control Solenoid Valve (EDS4)
8
Not Used
9
Transmission Fluid Temperature Sensor (+)
10
Pressure Control Valve Solenoid Valve (EDS5)
11
Pressure Control Valve Solenoid Valve (EDS6)
12
Solenoid Valve 1
13
Solenoid Valve 2
14
Not Used
15
Input Speed Sensor (-)
16
Input Speed Sensor (+)

Component Resistance Chart

Component
Pass
Through
Pins
Resistance
20°C (68°F)
Ohms
Resistance ≥140°C
(212°F) Ohms
Solenoid 1
3, 12
26.5± 0.5Ω
26-345 Ω (not relative to temperature)
Solenoid 2
3, 13
26.5± 0.5Ω
26-345 Ω (not relative to temperature)
Pressure Control
Solenoid Valve (EDS3)
5, 6
5.7± 0.45Ω
5.3-6.3 Ω (not relative to temperature)
Pressure Control
Solenoid Valve (EDS4)
5, 7
5.7± 0.45Ω
5.3-6.3 Ω (not relative to temperature)
Pressure Control
Solenoid Valve (EDS5)
5, 10
5.7± 0.45Ω
5.3-6.3 Ω (not relative to temperature)
Pressure Control
Solenoid Valve (EDS6)
5, 11
5.7± 0.45Ω
5.3-6.3 Ω (not relative to temperature)
Transaxle Temperature Sensor*
4, 9
980-1,000 Ω
Input Speed Sensor
15, 16
830 ± 5 Ω
788-871 Ω (not relative to temperature)
Output Speed Sensor*
1, 2
* The resistance of the transaxle is necessarily dependent on the temperature.

Symptom Diagnosis

Oil Leakage


Notice :
- Careful localization of leakage points may make it possible to prevent incorrect or cost-intensive repairs.

Test Steps :
- Thoroughly clean the transaxle, engine, and surrounding area(using a steam jet, for example).
- To locate leakage, use a suitable identifying spray or similar product.
- Depending on the amount of leakage, take the car for a short or a longer test drive - It may prove sufficient to place the car on a hoist and run the engine at idle speed to trace the leak.
- If possible, determine exactly which type of oil is escaping.
Symptom
Possible Cause
Action
Transaxle Oil Leakage
Oil Pump(Torque Converter Sealing)
  • Visually check torque converter sealing.
  • Replace the converter sealing as described in the transaxle repair on the vehicle service.
Crankshaft Sealing Ring
  • Check whether engine oil or TFT is leaking out.
  • If leak is engine oil, replace the sealing ring as described in the engine repair instruction.
Torque Converter
  • Visual check.
  • Fit an exchange converter as described in the repair instruction.
Oil Content Too High
  • Check oil level(TFT and axle oil) as described in this chapter.
  • Correct oil level, and recheck after a test drive.

Notice : Comply with the measuring procedure (filling procedure) in the repair instruction. Check the oil level at the overflow plug adjust to proper level if necessary.

O-ring at Bolt Head Damaged or Missing
  • Check O-ring.
  • Replace O-ring as described in the repair instruction.
Shaft Seal
  • Visually check the shaft seal.
  • Replace the sealing ring as described in the repair instruction.
Hose Clamp Loose
  • Check to ensure that the hose clamp fits tightly.
  • If necessary, retighten clamp.
Oil Pan Gasket Not Installed Properly
  • Check to see if the gasket was positioned properly.
  • Install gasket properly as described in the repair instruction.
Oil Pan Gasket Damaged
  • Check the gasket visually.
  • Replace gasket as described in the repair instruction.
Bolt at Bracket Loose
Check the Tightening Torque
Retighten bolt
Sealing Ring at Oil Dipstick
  • Check O-ring.
  • If necessary, replace O-ring.
Sealing Ring Near End-Cover Connection Defective
  • Check sealing rings.
  • Put in new sealing ring Check O-ring as described in the repair instruction.
Sealing Ring Selector Shaft
  • Check sealing ring.
  • Replace sealing ring as described in the repair instruction.
O-ring at Socket Outlet
  • Check O-ring.
  • Replace O-ring as described in the repair instruction.
O-ring and Speed Sensor Connection
  • Check O-ring.
  • Replace O-ring as described in the repair instruction.
Oil Leak Incorrectly Identified
  • No oil leak is possible at this point.
Speed Sensor Itself Is Leaking
  • Check speed sensor.
  • Replace speed sensor as described in the repair instruction.
Hair Line Crack at the Piping in the Connection Area, Sealing Ring Fit in Transaxle Housing
  • Pressurize the line with compressed air and check it.
  • Replace lines as described in the repair instruction.
O-ring Defective, Incorrect
Check O-ring.
Replace O-rings as described in the repair instruction.
Plug Loose
Check the Tightening Torque for the screw plug.
Tighten to torque specified in the repair instruction.

Noise

Symptom
Possible Cause
Action
Noise
TFT Level Too Low
  • When the TFT level is too low, the gear wheels from the transaxle oil pump might generate noise.
  • Check the TFT level as described in the repair instruction and fill to the proper level.
Monolith in Catalytic Converter Has Broken
  • Check according to the exhaust gas diagnostic procedure or by shaking the catalytic converter casing.
  • Replace catalytic converter if necessary.
Noise from Auxiliaries (e.g. exhaust system, alternator, drive shafts.)
  • Check these components; if necessary, eliminate the faults as described in the repair instruction
Noise from Tires or Wheel Bearings
  • Eliminate fault if necessary
Noise from Planetary Gears
  • Whistling noise on traction and overrun(in first gear only)caused by high rotating speeds(functionally unavoidable)
Cumulative Tooth Backlash in the Complete Drive Line
  • Production status. Customer must be convinced.
Jerky Noise of the Parking Lock (e.g. when the car is standing on a gradient)
  • Load-reversal reaction
  • Apply the handbrake before selection the parking Lock (position P)
Noise
The Engine's Torsional Vibrations are Being Transmitted to the Drive Shafts
  • At low speeds in fourth gear, vibration can arise (driving at too low an engine speed)
  • Noise is functionally unavoidable; due to tolerances. Convince the customer.
Noise
Torque Reaction Strut Loose
  • Check mounting and repair if necessary.

Shift quality


Notice :
- The assessment of shaft quality is, to a large extent, an individual, subjective matter. Take careful note of how the customer describes the complaint and of the manner in which he or she handles the vehicle and the controls.
- A sudden deterioration of shift quality may also be caused by the transaxle selecting an emergency or substitute program

Test Steps :
- Carry out the general checks described in the automatic transaxle diagnostic information.
- Perform a test drive to answer the following questions.
In which driving situations does the shift quality complaint arise?
To which shifts does the complaint apply?
Is the complaint reproducible within a short period, or has it only occurred sporadically or on a single occasion?
- Check the oil level and oil quality
- Interrogate the fault memory and read out measurement block data.
Symptom
Possible Cause
Action
Shift Quality
Rapid Pressure Build-up in the Clutch
  • Operating error (position selected several times in quick succession).
Jerk When Parking Lock Is Released
Incorrect Electronic Transaxle Control module
  • Check the data status for transaxle control module ; refer to "TCM" in this section.
Emergency/Substitute Program Has Been Activated
  • For checking and remedial action, refer to "Emergency/Substitute program" in this section.
Accelerator Pedal in Indefinite Position Between Full Throttle and Kick Down
  • Persuade customer to choose clearly between kick down and full throttle
  • Check setting according go engine repair instruction ; adjust if necessary.
Control Overlap Between to Clutches During Shift
  • Production status
  • Convince the customer
Temperature Sensor
(Not Fault Memory)
  • Check function according to "Emergency/Substitute program" in this section.
Kick Down Setting Incorrect
  • Check
A) Floor mat is obstructing accelerator pedal
B) The kick down setting as described in the Engine Section.

Malfunction


Notice :
The faults dealt with here concern transaxle functions such as "traction" (forwards and reverse) and all type of shifts. Entries will not always be made in the fault memory.

Test Steps :
Perform the general checks according to the automatic transaxle diagnostic procedure.
- Test drive
- Check oil level and quality
- Interrogate fault memory
Symptom
Possible Cause
Action
Malfunction
Defective Clutch in Transaxle It There Is Still No Drive With the TCM Disconnected
  • This is usually due to too little oil being added or to internal leakage.
  • Repair is not possible ; if necessary, exchange transaxle.
Kick Down Switch Not Functioning Properly
  • For checking and remedial action, refer to "Emergency/Substitute Program" in this section.
Kick Down Switch Not Operating Properly
  • For checking and remedial action, refer to Engine Instruction.
Vehicle Is in Emergency Mode
  • For checking and remedial action, refer to "Emergency/Substitute Program" in this section.


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