Service Manual2005 Diagnostic Trouble Code(DTC) P0727 To the top of the document
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Diagnostic Trouble Code(DTC) P0727

Engine Speed Input Circuit No Signal

Circuit Description

The transaxle control module(TCM) is an electronic device which monitors inputs to control various transaxle functions including shift quality and transaxle sensors, switches, and components to process for use within its' control program. Based on this input information, the TCM controls various transaxle output functions and devices.
DTC's P0725, P0726 and P0727 are related to the same circuit. These DTC's will not illuminate the MIL, however, the DTC will be stored in memory.
Information transmit between TCM and ECM through the CAN line. information is as follows :

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

DTC P0727 - Engine Speed Input Circuit No Signal

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
  1. Install the scan tool.
  2. Turn the ignition ON and record then clear DTC(s), then turn the ignition OFF.
  3. Observe the engine speed on the scan tool.
Is the speed within the values shown?
Engine speed
0-7,000rpm
Go to "Diagnostic Aids"
Go to Step 3
3
  1. Turn the ignition OFF.
  2. Disconnect the TCM wiring connector and ECM wiring connector.
  3. Measure the resistance between terminal A8 of the TCM wiring connector and terminal K14 of the ECM wiring connector.
  4. Measure the resistance between terminal A16 of the TCM wiring connector and terminal K15 of the ECM wiring connector.
Is the resistance within the values shown?
≈0Ω
Go to Step 5
Go to Step 4
4
Repair the malfunctioning terminals as necessary.
Is the action complete?
-
System OK
-
5
  1. Turn the ignition ON.
  2. Measure the voltage of terminal A8.
  3. Measure the voltage of terminal A16.
Is the voltage within the values shown?
11-14V
Go to Step 6
Go to Step 7
6
Repair the short to power.
Is the action complete?
-
System OK
-
7
Inspect the "Engine Speed". Refer to Section 1F, System Diagnosis.
Was a problem found?
-
Refer to Section 1F, System Diagnosis.
Go to Step 8
8
  1. Replace the TCM.
  2. Turn the ignition OFF.
  3. Turn the ignition ON.
  4. Check if P0727 DTC is set.
  5. Is The DTC set?
-
Go to Step 9
Go to Step 10
9
  1. Replace the ECM.
  2. Is the action complete?
-
Go to Step 10
-
10
  1. After the repair, use a scan tool "clear info" function and road test the vehicle.
  2. Review the "DTC info".
Has the last test failed or is the current DTC displayed?
-
Begin diagnosis again
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0731

Gear 1 Incorrect Ratio

Circuit Description

The TCM uses transaxle input speed information and output speed sensor to control line pressure, TCC apply and release and transaxle shift patterns. This information is also uses to calculate the appropriate operating gear ratios and TCC slippage. Conditions for Setting the DTC.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0731 - Gear 1 Incorrect Ratio

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
Visually inspect the transaxle cooling system for fluid leaks.
Was condition found and corrected?
-
Go to Step 7
Go to Step 3
3
Has the transaxle fluid checking procedure been performed?
-
Go to Step 4
Go to Transaxle fluid check procedures
4
  1. Using the scan tool record each transaxle drive range.
  2. Drive the vehicle in transaxle gear ranges 1,2,3 and D with TP greater than 15% and vehicle speed greater than 16km/h(10mph) for five seconds.
Does commanded gear ratio match ranges as shown?
1st = 2.719
2nd = 1.487
3rd = 1.000
4th = 0.717
Refer to Diagnostic Aids
Go to Step 5
5
Perform line pressure check.
Was the condition found and corrected?
-
Go to Step 7
Go to Step 6
6
Check for possible clutch slippage.
Was the condition found and corrected?
-
Go to Step 7
-
7
  1. After the repair, use a scan tool “clear info” function and road test the vehicle.
  2. Review the “DTC info”.
Has the last test failed or is the current DTC displayed?
 -
Replace transaxle assembly
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0732

Gear 2 Incorrect Ratio

Circuit Description

The TCM uses transaxle input speed information and output speed sensor to control line pressure, TCC apply and release and transaxle shift patterns. This information is also uses to calculate the appropriate operating gear ratios and TCC slippage. Conditions for Setting the DTC.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0732 - Gear 2 Incorrect Ratio

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
Visually inspect the transaxle cooling system for fluid leaks.
Was condition found and corrected?
-
Go to Step 7
Go to Step 3
3
Has the transaxle fluid checking procedure been performed?
-
Go to Step 4
Go to Transaxle fluid check procedures
4
  1. Using the scan tool record each transaxle drive range.
  2. Drive the vehicle in transaxle gear ranges 1,2,3 and D with TP greater than 15% and vehicle speed greater than 16km/h(10mph) for five seconds.
Does commanded gear ratio match ranges as shown?
1st = 2.719
2nd = 1.487
3rd = 1.000
4th = 0.717
Refer to Diagnostic Aids
Go to Step 5
5
Perform line pressure check.
Was the condition found and corrected?
-
Go to Step 7
Go to Step 6
6
Check for possible clutch slippage.
Was the condition found and corrected?
-
Go to Step 7
-
7
  1. After the repair, use a scan tool “clear info” function and road test the vehicle.
  2. Review the “DTC info”.
Has the last test failed or is the current DTC displayed?
 -
Replace transaxle assembly
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0733

Gear 3 Incorrect Ratio

Circuit Description

The TCM uses transaxle input speed information and output speed sensor to control line pressure, TCC apply and release and transaxle shift patterns. This information is also uses to calculate the appropriate operating gear ratios and TCC slippage. Conditions for Setting the DTC.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0733 - Gear 3 Incorrect Ratio

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
Visually inspect the transaxle cooling system for fluid leaks.
Was condition found and corrected?
-
Go to Step 7
Go to Step 3
3
Has the transaxle fluid checking procedure been performed?
-
Go to Step 4
Go to Transaxle fluid check procedures
4
  1. Using the scan tool record each transaxle drive range.
  2. Drive the vehicle in transaxle gear ranges 1,2,3 and D with TP greater than 15% and vehicle speed greater than 16km/h(10mph) for five seconds.
Does commanded gear ratio match ranges as shown?
1st = 2.719
2nd = 1.487
3rd = 1.000
4th = 0.717
Refer to Diagnostic Aids
Go to Step 5
5
Perform line pressure check.
Was the condition found and corrected?
-
Go to Step 7
Go to Step 6
6
Check for possible clutch slippage.
Was the condition found and corrected?
-
Go to Step 7
-
7
  1. After the repair, use a scan tool “clear info” function and road test the vehicle.
  2. Review the “DTC info”.
Has the last test failed or is the current DTC displayed?
 -
Replace transaxle assembly
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0734

Gear 4 Incorrect Ratio

Circuit Description

The TCM uses transaxle input speed information and output speed sensor to control line pressure, TCC apply and release and transaxle shift patterns. This information is also uses to calculate the appropriate operating gear ratios and TCC slippage. Conditions for Setting the DTC.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0734 - Gear 4 Incorrect Ratio

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
Visually inspect the transaxle cooling system for fluid leaks.
Was condition found and corrected?
-
Go to Step 7
Go to Step 3
3
Has the transaxle fluid checking procedure been performed?
-
Go to Step 4
Go to Transaxle fluid check procedures
4
  1. Using the scan tool record each transaxle drive range.
  2. Drive the vehicle in transaxle gear ranges 1,2,3 and D with TP greater than 15% and vehicle speed greater than 16km/h(10mph) for five seconds.
Does commanded gear ratio match ranges as shown?
1st = 2.719
2nd = 1.487
3rd = 1.000
4th = 0.717
Refer to Diagnostic Aids
Go to Step 5
5
Perform line pressure check.
Was the condition found and corrected?
-
Go to Step 7
Go to Step 6
6
Check for possible clutch slippage.
Was the condition found and corrected?
-
Go to Step 7
-
7
  1. After the repair, use a scan tool “clear info” function and road test the vehicle.
  2. Review the “DTC info”.
Has the last test failed or is the current DTC displayed?
 -
Replace transaxle assembly
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0781

1-2 Shift Malfunction

Circuit Description

The special feature of 4HP 16 Auto Transaxle is that it operates without freewheels. Shifting between individual gears takes place by means of overlapping clutch engagement and release.
The advantage of overlap shifting are as follows:
-The transaxle can be of more compact design and is lighter on account of the absence of freewheels and the lower number of shift elements.
-Lower drag losses, i.e. higher efficiency.
-Lower peak torque acting on the components and driveline.
However, overlap shifting necessitates high-performance hardware and software, and precision engine signals.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0781 - 1-2 Shift Malfunction

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
  1. Install the scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. Start engine and allow it to warm up at idle.
  4. Observe "idle rpm, TPS" on the scan tool.
Was condition found and corrected?
-
Refer to "Engine diagnostic information"
Go to Step 3
3
Inspect "ECM". Refer to Section 1F, System Diagnosis, EOBD System Check.
Was a problem found?
-
Go to "Section 1F, System Diagnosis"
Go to Step 4
4
  1. Turn the ignition OFF.
  2. Disconnect the TCM wiring connector.
  3. Measure the voltage between terminal B3 and B13 of the transaxle wiring connector.
  4. Turn the ignition ON.
  5. Measure the voltage between terminal C15 and B13 of the transaxle wiring connector.
  6. Measure the voltage between terminal C16 and B13 of the transaxle wiring connector.
Is the voltage within the values shown?
11-14V
Go to Step 5
Go to "System voltage low or high"
5
Replace the TCM.
Is the action complete?
-
Go to Step 6
-
6
  1. After the repair, use a scan tool "clear info" function and road test the vehicle.
  2. Review the "DTC info".
Has the last test failed or is the current DTC displayed?
-
Replace the transaxle assembly
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0782

2-3 Shift Malfunction

Circuit Description

The special feature of 4HP 16 Auto Transaxle is that it operates without freewheels. Shifting between individual gears takes place by means of overlapping clutch engagement and release.
The advantage of overlap shifting are as follows:
-The transaxle can be of more compact design and is lighter on account of the absence of freewheels and the lower number of shift elements.
-Lower drag losses, i.e. higher efficiency.
-Lower peak torque acting on the components and driveline.
However, overlap shifting necessitates high-performance hardware and software, and precision engine signals.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0782 - 2-3 Shift Malfunction

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
  1. Install the scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. Start engine and allow it to warm up at idle.
  4. Observe "idle rpm, TPS and so on" the scan tool.
Was condition found and corrected?
-
Refer to "Engine diagnostic information"
Go to Step 3
3
Inspect "ECM". Refer to Section 1F, System Diagnosis, EOBD System Check.
Was a problem found?
-
Go to "Section 1F, System Diagnosis"
Go to Step 4
4
  1. Turn the ignition OFF.
  2. Disconnect the TCM wiring connector.
  3. Measure the voltage between terminal B3 and B13 of the transaxle wiring connector.
  4. Turn the ignition ON.
  5. Measure the voltage between terminal C15 and B13 of the transaxle wiring connector.
  6. Measure the voltage between terminal C16 and B13 of the transaxle wiring connector.
Is the voltage within the values shown?
11-14V
Go to Step 5
Go to "System voltage low or high"
5
Replace the TCM.
Is the action complete?
-
Go to Step 6
-
6
  1. After the repair, use a scan tool "clear info" function and road test the vehicle.
  2. Review the "DTC info".
Has the last test failed or is the current DTC displayed?
-
Replace the transaxle assembly
Repair verified exit DTC chart
Range
Park/
Neutral
Reverse
D
3
2
1
Gear
N
R
1st
2nd
3rd
4th
1st
2nd
3rd
1st
2nd
1st
Solenoid Valve 1
ON
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
ON/
OFF
Solenoid Valve 2
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
Line Pressure Control Solenoid Valve 3 (EDS 3)
OFF
OFF
OFF
ON
ON/
OFF
ON/
OFF
OFF
ON
ON/
OFF
OFF
ON
OFF
Line Pressure Control Solenoid Valve 4 (EDS 4)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Line Pressure Control Solenoid Valve 5 (EDS 5)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
Line Pressure Control Solenoid Valve 6 (EDS 6)
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
ON
ON
Brake B
A
A
A
.
A
.
A
.
A
A
.
A
Brake C
.
.
.
.
.
H
.
.
.
.
.
.
Brake D
.
H
.
.
.
.
.
.
.
.
.
.
Clutch E
.
.
.
A
A
A
.
A
A
.
A
.
Brake F
.
.
H
H
.
.
H
H
.
H
H
H
Lock-up Clutch
.
.
.
.
.
A
.
.
.
.
.
.
A = Applied
H = Holding
ON = The solenoid is energized.
OFF = The solenoid is de-energized.
** = Manual Second-Third gear is only available above approximately 100 km/h (62 mph).
*** = Manual First-Second gear is only available above approximately 60 km/h (37 mph).

Note : Manual First-Third gear is also possible at high vehicle speed as a safety feature.

Diagnostic Trouble Code(DTC) P0783

3-4 Shift Malfunction

Circuit Description

The special feature of 4HP 16 Auto Transaxle is that it operates without freewheels. Shifting between individual gears takes place by means of overlapping clutch engagement and release.
The advantage of overlap shifting are as follows:
-The transaxle can be of more compact design and is lighter on account of the absence of freewheels and the lower number of shift elements.
-Lower drag losses, i.e. higher efficiency.
-Lower peak torque acting on the components and driveline.
However, overlap shifting necessitates high-performance hardware and software, and precision engine signals.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

Diagnostic Aids

DTC P0783 - 3-4 Shift Malfunction

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
  1. Install the scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. Start engine and allow it to warm up at idle.
  4. Observe "idle rpm, TPS and so on" the scan tool.
Was condition found and corrected?
-
Refer to "Engine diagnostic information"
Go to Step 3
3
Inspect "ECM". Refer to Section 1F, System Diagnosis, EOBD System Check.
Was a problem found?
-
Go to "Section 1F, System Diagnosis"
Go to Step 4
4
  1. Turn the ignition OFF.
  2. Disconnect the TCM wiring connector.
  3. Measure the voltage between terminal B3 and B13 of the transaxle wiring connector.
  4. Turn the ignition ON.
  5. Measure the voltage between terminal C15 and B13 of the transaxle wiring connector.
  6. Measure the voltage between terminal C16 and B13 of the transaxle wiring connector.
Is the voltage within the values shown?
11-14V
Go to Step 5
Go to "System voltage low or high"
5
Replace the TCM.
Is the action complete?
-
Go to Step 6
-
6
  1. After the repair, use a scan tool "clear info" function and road test the vehicle.
  2. Review the "DTC info".
Has the last test failed or is the current DTC displayed?
-
Replace the transaxle assembly
Repair verified exit DTC chart

J3D15A03
Display graphicTranslations of text in graphics


Diagnostic Trouble Code(DTC) P1604

Data Check of Internal & Extended Ram Failed

Circuit Description

A normal function of the Transmission Control Module (TCM) programming is to perform an internal check that verifies the integrity of the RAM memory allocations.
The DTC P1604 sets when the Random Access Memory(RAM) is not operating correctly when checked on initialization. An area of RAM is failed a read/ write test.

Conditions for Setting The DTC

Action Taken When The DTC Sets

Conditions for Clearing the MIL/DTC

The MIL will turn OFF when the malfunction has not occurred after three-ignition cycle.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
Using a scan tool can clear history DTCs.

Diagnostic Aids

DTC P1604 - Data Check Of Internal & Extended Ram Failed

Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System Check.
Is the check completed?
-
Go to Step 2
Go to "On-Board Diagnostic System Check"
2
  1. Install the scan tool.
  2. Turn the ignition ON, with the engine OFF.
Does the scan tool display P1604?
-
Go to Step 3
Go to "Diagnostic Aids"
3
  1. Turn the ignition OFF.
  2. Replace the TCM.
Is the action complete?
-
Go to Step 4
-
4
  1. Using the scan tool, clear the DTC.
  2. Road test the vehicle within the conditions for setting this DTC as specified in the text.
Does the scan tool indicate that this diagnostic has run and passed?
-
Go to Step 5
Go to Step 2
5
  1. Check if any DTC(s) are set.
  2. Are any DTC(s) displayed that have not been diagnosed?
-
Go to "Applicable DTC table"
System OK


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