DTC P0712

BHE050201026W10

DTC P0712

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

DETECTION CONDITION

• Signal from TFT sensor is 0.1 V or less for 150 s or more.

Diagnostic support note:

• This is a continuous monitor (CCM).
• MIL illuminates if TCM detects the above malfunction condition during the first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• AT warning light illuminates.
• DTC is stored in TCM memory.

POSSIBLE CAUSE

• TFT sensor malfunction
• Short to ground in wiring harness between TFT sensor terminal D and TCM terminal 2J
• 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 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 ON position (engine off).
• Inspect the voltage at TCM (wiring harness-side) terminal 2J.
• Is the terminal voltage within 0.2-4.9 V?
Yes
Go to the intermittent concern troubleshooting procedure, then go to Step 9.
No
Go to the next step.
4

INSPECT TERMINAL CONDITION

• Turn the ignition switch to the LOCK position.
• Disconnect the AT solenoid valve connector.
• Inspect for bent terminals.
• 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 (wiring harness-side) terminal 2J voltage changes to 4.9 V or more when the AT solenoid valve connector is disconnected.
• Does the TCM (wiring harness-side) terminal voltage change?
Yes
Go to the next step.
No
Go to Step 8.
6

INSPECT CONTROL VALVE BODY CONNECTOR TERMINALS CONDITION

• Turn the ignition switch to the LOCK position.
• Disconnect the control valve body connector.
• Inspect for bent control valve body connector terminals.
• Are the terminals normal?
Yes
Go to the next step.
No
Repair or replace the connector and/or terminal, then go to the next step.
7

INSPECT CONTROL VALVE BODY CONNECTOR CIRCUIT FOR SHORT TO GROUND

• Inspect for continuity between the control valve body (wiring harness-side) terminal D and body ground.
• Is there continuity?
Yes
Replace the TFT sensor, then go to Step 9.
No
Repair or replace the wiring harness, then go to Step 9.
8

INSPECT AT SOLENOID VALVE CONNECTOR CIRCUIT FOR SHORT TO GROUND

• Turn the ignition switch to the LOCK position.
• Inspect for continuity between the AT solenoid valve connector (wiring harness-side) terminal C 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 for 150 s or more.
• 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.