DTC P0712: ATF Temperature Sensor (Short): Notes

Fig 1: DTC Troubleshooting Flow Chart (P0712)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0712 ATF Temperature Sensor (Short)

Problem verification:

1. Turn the ignition switch to ON (II).

2. Check the parameter(s) below with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
ATF Temp Sensor (V)	Less than 0.07	V

Do the current condition(s) match the threshold?

YES : The failure is duplicated. Go to step 2.

NO : Intermittent failure, the system is OK at this time. Check for an intermittent short to ground in the TATF wire between the ATF temperature sensor and the PCM.

ATF temperature sensor check:

1. Turn the ignition switch to LOCK (0).
2. Disconnect the following connector.
Shift solenoid wire harness 8P connector
3. Turn the ignition switch to ON (II).

4. Check the parameter(s) below with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
ATF Temp Sensor (V)	Less than 0.07	V

Do the current condition(s) match the threshold?

YES : The ATF temperature sensor is OK. Go to step 3.

NO : REPLACE THE ATF TEMPERATURE SENSOR , then do the do the repair verification .

Shorted wire check (TATF line):
- 1. Turn the ignition switch to LOCK (0).
- 2. Jump the SCS line with the HDS.
- 3. Disconnect the following connector.
  PCM connector B (49P)
- 4. Check for continuity between test points 1 and 2.
  Test condition IG LOCK (0)
  
  Shift solenoid wire harness 8P connector: disconnected
  
  PCM connector B (49P): disconnected
  
  Test circuit TATF
  
  Test point 1 Shift solenoid wire harness 8P connector No. 7 (RED)
  
  Test point 2 Body ground
  
  Fig 2: Checking For Continuity Between Shift Solenoid Wire Harness 8P Connector No. 7 (RED) And Body Ground
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?

YES : Repair a short to ground in the TATF wire between the shift solenoid wire harness and the PCM, then do the do the repair verification .

NO : The TATF wire is OK. Update the PCM if it does not have the latest software See PCM REMOVAL AND INSTALLATION or PCM UPDATE , or substitute a known-good PCM See PCM REMOVAL AND INSTALLATION or PCM UPDATE , then do the do the repair verification .