DTC Troubleshooting: P0712 (28)
DTC P0712:
 Short in ATF Temperature Sensor Circuit
NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information.
  • This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
  1. Turn the ignition switch to ON (II).
  1. Check the ATF Temp Sensor voltage in the Data List with the HDS.
Is the ATF Temp Sensor voltage 0.07 V or less?
YES -
Go to Step 3 .
NO -
Intermittent failure, the system is OK at this time. Check for an intermittent short to body ground in the ATFT wire between the ATF temperature sensor and the PCM.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the shift solenoid wire harness connector.
  1. Turn the ignition switch to ON (II).
  1. Check the ATF Temp Sensor voltage in the Data List with the HDS.
Is the ATF Temp Sensor voltage 0.07 V or less?
YES -
Go to Step 7 .
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect PCM connector; R20A3 engine model: B (44P), K24Z3 engine model: B (49P).
  1. Check for continuity between shift solenoid wire harness connector terminal No. 6 and body ground.
Is there continuity?
YES -
Repair short to body ground in the wire between PCM connector terminal; R20A3 engine model: B27, K24Z3 engine model: B28 and shift solenoid wire harness connector terminal No. 6, then go to Step 12 .
NO -
Go to Step 11 .
  1. Remove the shift solenoid wire harness, and check for continuity between shift solenoid wire harness connector terminal No. 6 and body ground. Do not disconnect the shift solenoid valve D connector.
Is there continuity?
YES -
NO -
Go to Step 18 .
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Start the engine with the shift lever in P, and wait for at least 20 seconds.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0712 indicated?
YES -
Check for intermittent short to body ground in the wire between the ATF temperature sensor and the PCM, then go to Step 1 .
NO -
Go to Step 17 .
  1. 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 Temporary DTCs or DTCs were indicated in Step 16 , go to the indicated DTC's troubleshooting.■
NO -
If the HDS indicates FAILED, check for intermittent short to body ground in the wire between the ATF temperature sensor and the PCM, then go to Step 1 . If the HDS indicates NOT COMPLETED, go to Step 15 .
  1. Reconnect all connectors.
  1. Update the PCM if it does not have the latest software; R20A3 engine model, K24Z3 engine model, or substitute a known-good PCM.
  1. Start the engine with the shift lever in P, and wait for at least 20 seconds.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0712 indicated?
YES -
Check for intermittent short to body ground in the wire between the ATF temperature sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then go to Step 20 . If the PCM was substituted, go to Step 1 .
NO -
Go to Step 22 .
  1. 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; R20A3 engine model, K24Z3 engine model. If any other Temporary DTCs or DTCs were indicated in Step 21 , go to the indicated DTC's troubleshooting.■
NO -
If the HDS indicates FAILED, check for intermittent short to body ground in the wire between the ATF temperature sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then go to Step 20 . If the PCM was substituted, go to Step 1 . If the HDS indicates NOT COMPLETED, go to Step 20 .