DTC P0712, P0713, P1713, P1718 [LA4AX-EL (CD4E)]

id0502a3806000

DTC P0712

Transaxle fluid temperature (TFT) sensor circuit malfunction (short to ground)

DTC P0713

Transaxle fluid temperature (TFT) sensor circuit malfunction (open circuit/short to power supply)

DTC P1713

ATF signal stuck at low temperature.

DTC P1718

ATF signal stuck at high temperature.

DETECTION CONDITION

• P0712: PCM detects that ATF signal output from ATF sensor is 150× C {302× F} or more
• P0713: PCM detects ATF signal from ATF sensor is -40× C {-40× F} or less
• P1713: ATF signal from ATF sensor does not change from -40× C {-40× F} or less
• P1718: ATF signal from ATF sensor does not change from 150× C {302× F} or more

POSSIBLE CAUSE

• TFT sensor malfunction
• Short to ground in wiring harness between TFT sensor and ATX terminal E
• Short to ground in wiring harness between TFT sensor and ATX terminal H
• Short to ground in wiring harness between ATX terminal E and PCM terminal 91
• Short to ground in wiring harness between ATX terminal H and PCM terminal 37
• Open circuit in wiring harness between TFT sensor and ATX terminal E
• Open circuit supply in wiring harness between TFT sensor and ATX terminal H
• Open circuit supply in wiring harness between ATX terminal E and PCM terminal 91
• Open circuit supply in wiring harness between ATX terminal H and PCM terminal 37
• Short to power supply in wiring harness between TFT sensor and ATX terminal E
• Short to power supply in wiring harness between TFT sensor and ATX terminal H
• Short to power supply in wiring harness between ATX terminal E and PCM terminal 91
• Short to power supply in wiring harness between ATX terminal H and PCM terminal 37
• Damaged connectors between TFT sensor and PCM
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related Service Bulletins and or/on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3

INSPECT ATX CONNECTOR FOR POOR CONNECTION

• Turn the ignition switch to the LOCK position.
• Inspect ATX connector connection.
• Disconnect the ATX connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is the connection normal?
Yes
Go to the next step.
No
Repair or replace the connector and/or terminals, then go to Step 9.
4

INSPECT TFT SENSOR

• Inspect the TFT sensor.
• Is TR switch normal?
Yes
Go to the next step.
No
Replace the TFT sensor, then go to Step 9.
5

INSPECT PCM CONNECTOR FOR POOR CONNECTION

• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is the connection normal?
Yes
Go to the next step.
No
Repair or replace the connector and/or terminals, then go to Step 9.
6

INSPECT TFT SENSOR CIRCUIT FOR SHORT TO GROUND

• Inspect for continuity between ATX terminals (wiring harness-side) and body ground.
- E and body ground
- H and body ground
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 9.
No
Go to the next step.
7

INSPECT TFT SENSOR CIRCUIT FOR OPEN CIRCUIT

• Inspect the following ATX terminals (wiring harness-side) and PCM terminals (wiring harness-side):
- E and 91
- H and 37
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 9.
8

INSPECT TFT SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY

• Turn the ignition switch to the ON position (engine off).
• Inspect the voltage at ATX terminals E and H (wiring harness-side).
• Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to the next step.
9

VERIFY TROUBLESHOOTING OF DTC P0712, P0713, P1713 OR P1718 COMPLETED

• Make sure to reconnect all the disconnected connectors.
• Clear the DTC from the memory using the WDS or equivalent.
• Perform the "After Repair Procedure".
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
10
VERIFY DTCS
• Are except DTC P0712, P0713, P1713 and P1718 output?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.