DTC Troubleshooting: P0712 (28-3)

DTC P0712:  Short in ATF Temperature Sensor Circuit

NOTE:

1.Check the ATF temperature sensor voltage with the HDS in the A/T data list.

Is the ATF temperature sensor voltage 0.07 V or less?


YES - Go to 2.


NO - Intermittent failure, the system is OK at this time. Check for an intermittent short in the ATFT wire between the ATF temperature sensor and the PCM.n


2.Disconnect the shift solenoid harness connector at the shift solenoid valve cover.

3.Check the ATF temperature sensor voltage with the HDS.

Is the ATF temperature sensor voltage 0.07 V or less?


YES - Go to 4.


NO - Replace ATF temperature sensor, then go to 9.

4.Turn the ignition switch OFF.

5.Jump the SCS line with the HDS.

6.Disconnect PCM connector B (44P).

7.Check for continuity between shift solenoid harness connector terminal No. 6 and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector terminal B27 and shift solenoid harness connector terminal No. 6, then go to 9.


NO - Go to 8.

8.Remove the shift solenoid harness connector, and check for continuity between shift solenoid harness connector terminal No. 6 and body ground. Do not disconnect shift solenoid valve A connector.

 

Is there continuity?


YES - ATF temperature sensor wire shorted out. Replace the shift solenoid harness connector, then go to 9.


NO - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original  PCM.n

9.Clear the DTC with the HDS.

10.Test-drive the vehicle for several minutes in the D position through all five gears.

11.Monitor the OBD status for P0712 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the result indicate PASSED?


YES - Troubleshooting is complete.n


NO - Return to 1 and recheck.