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DTC P0712 [FN4A-EL]

BME050201030209

DTC P0712 | Transaxle fluid temperature (TFT) sensor circuit malfunction (short to ground)
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DETECTION CONDITION | • If the PCM detects the following conditions for 150 s or more, the PCM determines that the TFT sensor circuit has a malfunction.

  - TFT sensor voltage is 0.06 V or less and vehicle speed is 20 km/h {12 mph} or more.

Diagnostic support note:
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction conditions during the first drive cycle.
• A PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• The HOLD indicator light flashes.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • TFT sensor malfunction • Short to ground between TFT sensor and ATX terminal E • Short to ground between TFT sensor and ATX terminal H • Short to ground between ATX terminal E and PCM terminal 3D • Damaged connectors between TFT sensor and PCM
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 | VERIFY CURRENT INPUT SIGNAL STATUS • Turn the ignition switch to the ON position (engine off). • Inspect the voltage at PCM terminal 3D. • Are the voltage readings above 0.06 V? | Yes | Go to intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3].)
No | Go to the next step.
4 | INSPECT TERMINAL CONDITION • Turn the ignition switch to the LOCK position. • Disconnect the ATX connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are the terminals bent? | Yes | Repair or replace the terminals, then go to Step 8. • If terminals cannot be repaired, replace the wiring harness, then go to Step 8.
No | Go to the next step.
5 | INSPECT TFT SENSOR CIRCUIT • Turn the ignition switch to the ON position (engine off). • Verify that the voltage changes to 4.67 V or more at PCM terminal 3D when ATX connector disconnected. • Does the voltage change? | Yes | Go to the next step.
No | Go to Step 7.
6 | INSPECT TFT SENSOR CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between ATX (transaxle case side) terminals 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 8.
No | Replace the TFT sensor, then go to step 8. (See TRANSAXLE FLUID TEMPERATURE (TFT) SENSOR REMOVAL/INSTALLATION [FN4A-EL].)
7 | INSPECT ATX CONNECTOR CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch to the LOCK position. • Inspect for continuity between ATX (vehicle wiring harness-side) terminal E 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.
8 | VERIFY TROUBLESHOOTING OF DTC P0712 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the 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} or more.

• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [FN4A-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [FN4A-EL].)
No | DTC troubleshooting completed.