27-2

SH-AWD DTC Troubleshooting: 27-2

DTC 27-2: Hypoid Gear Speed Sensor Malfunction

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

1. Turn the ignition switch to 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. Testing and Inspection

3. Clear the DTC with the HDS.

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

5. Raise the vehicle, make sure it is securely supported, and allow all four wheels to rotate freely.

6. Start the engine.

7. Turn the VSA off (the light on the VSA OFF switch comes on). Run the engine in the D until the vehicle speed reaches 19 mph (30 km/h), then slow down and stop the wheels.

8. Check for DTCs with the HDS.

Is DTC 27-2 indicated?
YES - Go to step 9.

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


9. Check for DTCs in the VSA system with the HDS.

Are any VSA System DTCs indicated?
YES - Go to the indicated DTC's troubleshooting.

NO - Go to step 10.


10. Run the engine in the D until the vehicle speed reaches 19 mph (30 km/h) and maintain the speed.

11. Check a the hypoid gear speed sensor value with the HDS.

Is a hypoid gear speed sensor value shown?
YES - Substitute a known-good SH-AWD control unit Service and Repair and recheck. If the symptom/indication goes away with the known-good SH-AWD control unit, replace the original SH-AWD control unit. Service and Repair

NO - Go to step 12.


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

13. Disconnect the hypoid gear speed sensor 3P connector.

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

15. Measure the voltage between hypoid gear speed sensor 3P connector terminals No. 1 and No. 3.

Is there 4.0 V or more for at least 30 seconds?
YES - Go to step 16.

NO - Go to step 20.






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

17. Disconnect SH-AWD control unit connector A (26P).

18. Connect the hypoid gear speed sensor 3P connector terminal No. 2 to body ground with a jumper wire.






19. Check for continuity between SH-AWD control unit connector terminal A2 and body ground.

Is there continuity?
YES - Replace the hypoid gear speed sensor. Service and Repair

NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor connector.






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

21. Disconnect SH-AWD control unit connector A (26P).

22. Connect the hypoid gear speed sensor 3P connector terminal No. 1 to body ground with a jumper wire.






23. Check for continuity between SH-AWD control unit connector terminal A18 and body ground.

Is there continuity?
YES - Go to step 24.

NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor connector.






24. Remove the jumper wire from hypoid gear speed sensor 3P connector terminal No. 1.

25. Check for continuity between SH-AWD control unit connector terminal A18 and body ground.

Is there continuity?
YES - Repair short to body ground in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor connector.

NO - Go to step 26.






26. Connect the hypoid gear speed sensor 3P connector terminal No. 3 to body ground with a jumper wire.






27. Check for continuity between SH-AWD control unit connector terminal A5 and body ground.

Is there continuity?
YES - Substitute a known-good SH-AWD control unit Service and Repair and recheck.

NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor connector.