DTC P0712: ATF Temperature Sensor (Short)

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, 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 - 10 models
- *(2): '11 - 12 models

Turn the ignition switch to ON (II), and wait for 20 seconds.
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 wire between the ATF temperature sensor and the PCM.
Turn the ignition switch to LOCK (0).
Disconnect the shift solenoid harness connector at the shift solenoid valve 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 7.

NO -Replace the ATF temperature sensor/shift solenoid harness (see TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH) REPLACEMENT ), then go to step 16.
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Disconnect PCM connector B (49P).
Check for continuity between shift solenoid harness connector terminal No. 6 and body ground.

Fig 1: Checking Continuity Between Shift Solenoid Harness Connector Terminal No. 6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short in the wire between PCM connector terminal B28 and shift solenoid harness connector terminal No. 6, then go to step 16.

NO -Go to step 11.
Reconnect all connectors.
Update the A/T software in the PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ).
Turn the ignition switch to ON (II), and wait for 20 seconds, then start the engine in P. Run the engine 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 ECM/PCM ), then recheck. If the PCM was substituted, go to step 1.

NO -Go to step 15.
Monitor the OBD STATUS for P0712 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED?

YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see ECM/PCM REPLACEMENT ). If any other DTCs were indicated on step 14, go to the indicated DTC's troubleshooting.

NO -Check for poor connections and loose terminals at the ATF temperature sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 13 and recheck.
Reconnect all connectors.
Clear the DTC with the HDS.
Turn the ignition switch to ON (II), and wait for
20 seconds, then start the engine in P. Run the engine 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 at the ATF temperature sensor and the PCM, then go to step 1.

NO -Go to step 20.
Monitor the OBD STATUS for P0712 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED?

YES -Troubleshooting is complete. If any other DTCs were indicated on step 19, go to the indicated DTC's troubleshooting.

NO -return to step 1. If the HDS indicates NOT COMPLETED, return to step 18 and recheck.