DTC P0712 [JA5A-EL]

BME050218901208

DTC P0712

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

DETECTION CONDITION

• If the signal from the TFT sensor is 0.088 V or less for 20 s or more, the TCM determines that there is a malfunction.
Diagnostic support note:
• This is a continuous monitor (CCM).
• The MIL illuminates if the TCM detects the above malfunction conditions in two consecutive drive cycles.
• PENDING CODE is available.
• FREEZE FRAME DATA is available.
• The HOLD indicator light flashes.
• The DTC is stored in the TCM memory.

POSSIBLE CAUSE

• TFT sensor malfunction.
• Open circuit in wiring harness between TFT sensor and TCM terminal 1F
• Open circuit in wiring harness between TFT sensor and TCM terminal 1B
• Damaged connectors between TFT sensor and TCM
• TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME PID 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
VERIFY CURRENT INPUT SIGNAL STATUS - IS CONCERN INTERMITTENT OR CONSTANT?
• Turn the ignition switch to the LOCK position.
• Turn the ignition switch to the ON position (engine off).
• Are the TCM terminal 1F voltage within 0.2-4.9 V?
Yes
Go to the intermittent concern troubleshooting procedure.
No
Go to the next step.
4
INSPECT TERMINAL CONDITION
• Turn the ignition switch to the LOCK position.
• Disconnect the terminal component No.2.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminals, then go to Step 9.
• If the terminals cannot be repaired, replace the wiring harness, then go to Step 9.
No
Go to the next step.
5
INSPECT TFT SENSOR CIRCUIT
• Turn the ignition switch to the ON position (engine off).
• Verify if the TCM terminal voltage changes to 4.9 V or above when the terminal component No.2 disconnected.
• Does the TCM terminal voltage change?
Yes
Go to the next step.
No
Go to Step 8.
6
INSPECT COUPLER COMPONENT (8-PIN) TERMINALS CONDITION
• Turn the ignition switch to the LOCK position.
• Disconnect the coupler component (8-pin) connector.
• Inspect for bent coupler component (8-pin) terminals.
• Is there any malfunction?
Yes
Repair or replace the connector and/or terminal.
No
Go to the next step.
7
INSPECT COUPLER COMPONENT (8-PIN) CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between coupler component (8-pin) terminals (part-side) and body ground.
- I and body ground
- J and body ground
• Is there continuity?
Yes
Replace the TFT sensor, then go to Step 9.
No
Repair or replace the coupler component, then go to Step 9.
8
INSPECT TERMINAL COMPONENT NO.2 (8-PIN) CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch to the LOCK position.
• Inspect for continuity between the terminal component No.2 terminal G (wiring harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to the next step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0712 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the TCM memory using the WDS or equivalent.
• Drive the vehicle under the following condition for 150 s or more.
- Vehicle speed (VSS PID): 20 km/h {12 mph}
• Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.