DTC P0712: Short in ATF Temperature Sensor Circuit

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
Some wire colors vary according to the model year, and are indicated with an asterisk as follows:
- *1: '09-11 models

- *2: '12 model

Check the ATF temperature sensor voltage with the HDS in the A/T Data List.
Is the ATF Temp Sensor (V) 0.07 V or less?

YES -Go to step 2.

NO -Intermittent failure, the system is OK at this time. Check for an intermittent short in the TATF wire between the ATF temperature sensor and the PCM.
Turn the ignition switch to LOCK (0).
Disconnect the ATF temperature sensor connector at the transmission end cover.
Turn the ignition switch to ON (II).
Check the ATF temperature sensor voltage with the HDS.
Is the ATF Temp Sensor (V) 0.07 V or less?

YES -Go to step 6.

NO -Replace ATF temperature sensor (see ATF TEMPERATURE SENSOR REPLACEMENT ), then go to step 15.
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Disconnect PCM connector C (49P).
Check for continuity between ATF temperature sensor connector terminal No. 2 and body ground.

Fig 1: Checking Continuity Between ATF Temperature Sensor Connector Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wire between PCM connector terminal C33 and ATF temperature sensor connector terminal No. 2, then go to step 15.

NO -Go to step 10.
Reconnect all connectors.
Update the A/T software in the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
With shift lever in P, turn the ignition switch to ON (II), and wait for least 20 seconds. Then start the engine, and wait for at least 10 seconds.
Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0712 indicated?

YES -If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted, go to step 1.

NO -Go to step 14.
Monitor the OBD STATUS for P0712 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?

YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ). If any other Pending or Confirmed DTCs were indicated on step 13, go to the indicated DTC's troubleshooting.

NO -If the HDS indicates FAILED, check for poor connections and loose terminals between the ATF temperature sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 12.
Reconnect all connectors.
Clear the DTC with the HDS.
Start the engine in P, and wait for at least 10 seconds.
Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0712 indicated?

YES -Check for poor connections and loose terminals between the ATF temperature sensor and the PCM, then go to step 1.

NO -Go to step 19.
Monitor the OBD STATUS for P0712 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?

YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated on step 18, go to the indicated DTC's troubleshooting.

NO -If the HDS indicates FAILED, check for an intermittent short to body ground in the wire between the ATF temperature sensor and the PCM, then go to step 1 and recheck. If the HDS indicates NOT COMPLETED, go to step 17 and recheck.