DTC 42-1

DTC 42-1: Differential Oil Temperature Sensor (Open)

NOTE: Before you troubleshoot, review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Make sure the HDS communicates with the vehicle and the SH-AWD control unit. If it doesn't, troubleshoot the DLC circuit.
3. Clear the DTC with the HDS.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II).
6. Check for DTCs with the HDS.

Is DTC 42-1 indicated?

YES - Go to step 7.

NO - Intermittent failure, the system is OK at this time.

7. Turn the ignition switch OFF.
8. Disconnect the rear differential oil temperature sensor 2P connector and SH-AWD connector A (26P).
9. Check for continuity between rear differential oil temperature sensor 2P connector terminals No. 1 and No. 2.





Is there continuity?

YES - Repair short in the wire between rear differential oil temperature sensor 2P connector terminals No. 1 and No. 2.

NO - Go to step 10.

10. Connect the rear differential oil temperature sensor 2P connector.
11. Measure the resistance between SH-AWD control unit connector terminals A9 and A23.





Is there 520 Ohms to 3.5 k ohms with the rear differential fluid at normal temperature?

YES - Substitute a known-good SH-AWD control unit and recheck.

NO -Replace the rear differential oil temperature sensor.