DTC P0712 [FN4A-EL]

id0502a1801300

DTC P0712

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

DETECTION CONDITION

• If PCM detects either of following conditions for 150 s or more, PCM determines that TFT sensor circuit has a malfunction.
- TFT sensor voltage is 0.06 V or below and vehicle speed 20 km/h {12 mph} or above.
Diagnostic support note:
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions during first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• HOLD indicator light flashes.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• TFT sensor malfunction
• Short to ground between TFT sensor and ATX connector terminal E
• Short to ground between TFT sensor and ATX connector terminal H
• Short to ground between ATX connector terminal E and PCM terminal 1AU
• Damaged connectors between TFT sensor and PCM
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

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

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Check for related Service Bulletins availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available repair information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3

VERIFY CURRENT INPUT SIGNAL STATUS

• Turn the ignition switch off.
• Connect breakout box to PCM.
• Turn the ignition switch to the ON position (Engine OFF).
• Measure the voltage at PCM terminal 1AU.
• Are voltage readings above 0.06 V?
Yes
Go to intermittent concern troubleshooting procedure.
No
Go to next step.
4

INSPECT TERMINAL CONDITION

• Turn the ignition switch off.
• Disconnect ATX connector.
• Inspect for bent terminals.
• Are the terminals bent?
Yes
Repair or replace terminals, then go to Step 8.
• If terminals cannot be repaired, replace harness, then go to Step 8.
No
Go to next step.
5

INSPECT TFT SENSOR CIRCUIT

• Turn the ignition switch to the ON position (Engine OFF).
• Verify if voltage changes to 4.67 V or above at PCM terminal 1AU when ATX connector disconnected.
• Does voltage change?
Yes
Go to next step.
No
Go to Step 7.
6

INSPECT TFT SENSOR CIRCUIT FOR SHORT TO GROUND

• Inspect for continuity between ATX terminals (transaxle case side) and body ground.
- E and body ground
- H and body ground
• Is there continuity?
Yes
Repair or replace harness, then go to Step 8.
No
Replace TFT sensor, then go to step 8.
7

INSPECT ATX CONNECTOR CIRCUIT FOR SHORT TO GROUND

• Turn the ignition switch off.
• Inspect for continuity between ATX connector terminal E (vehicle harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace harness, then go to next step.
No
Go to next step.
8

VERIFY TROUBLESHOOTING OF DTC P0712 COMPLETED

• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using WDS or equivalent.
• Drive vehicle under following condition for

150 s or more.

- Vehicle speed (VSS PID) 20 km/h {12 mph} or above.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
9

VERIFY AFTER REPAIR PROCEDURE

• Perform "After Repair Procedure".
• Are any DTCs present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.