42-2

SH AWD DTC Troubleshooting: 42-2

DTC 42-2:

Differential Fluid Temperature Sensor (Open/GND Short)

NOTE: Before you troubleshoot, review the general troubleshooting information Initial Inspection and Diagnostic Overview.

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

2. Clear the DTC with the HDS.

3. Raise and support the vehicle Service and Repair, and allow all four wheels to rotate freely.

4. Start the engine and turn the VSA off (the VSA OFF switch indicator in the gauge control module turns on). Run the engine in D until the vehicle speed reaches 35 mph (56 km/h) and maintain the speed for 10 minutes, then slow down and stop the wheels.

5. Check for DTCs with the HDS.

Is DTC 42-2 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time.�

6. Turn the ignition switch to LOCK (0).

7. Disconnect SH-AWD control unit connector A (20P).

8. Connect SH-AWD control unit connector terminal A18 to body ground with a jumper wire.





9. Disconnect the rear differential fluid temperature sensor 2P connector.

10. Check for continuity between rear differential fluid temperature sensor 2P connector terminal No. 1 and body ground.





Is there continuity?

YES -

Go to step 11.

NO -

Repair an open in the wire between SH-AWD control unit connector A and the rear differential fluid temperature sensor 2P connector.�

11. Remove the jumper wire from SH-AWD control unit connector terminal A18.

12. Connect SH-AWD control unit connector terminal A8 to body ground with a jumper wire.






13. Check for continuity between rear differential fluid temperature sensor 2P connector terminal No. 2 and body ground.





Is there continuity?

YES -

Go to step 14.

NO -

Repair an open in the wire between SH-AWD control unit connector A and the rear differential fluid temperature sensor 2P connector.�

14. Remove the jumper wire from SH-AWD control unit connector terminal A8.

15. Check for continuity between SH-AWD control unit connector terminals A9 and A18.





Is there continuity?

YES -

Repair a short in the wire between SH-AWD control unit connector A and the rear differential fluid temperature sensor 2P connector.�

NO -

Go to step 16.

16. Check for continuity between SH-AWD control unit connector terminals A8 and A9.





Is there continuity?

YES -

Repair a short in the wire between SH-AWD control unit connector A and the rear differential fluid temperature sensor 2P connector.�

NO -

Go to step 17.

17. Reconnect the rear differential fluid temperature sensor 2P connector.

18. Measure the resistance between SH-AWD control unit connector terminals A8 and A18.





Is there 12.67 kOhms or less?

YES -

Update the SH-AWD control unit if it does not have the latest software SH-AWD Control Unit Update, or substitute a known-good SH-AWD control unit Service and Repair and recheck. If the symptom/indication goes away with the updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit, replace the original SH-AWD control unit Service and Repair.�

NO -

Replace the rear differential fluid temperature sensor Service and Repair.�