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DTC P0712

BHE050201026W10

DTC P0712 | Transmission fluid temperature (TFT) sensor circuit malfunction (short to ground)
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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
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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. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
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. (See TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR REMOVAL/INSTALLATION.)
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. (See TCM REMOVAL/INSTALLATION.)
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [RC4A-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [RC4A-EL].)
No | DTC troubleshooting completed.