DTC 76-1
DTC 76-1: Rear Differential Fluid OverheatsNOTE:
^ When the temperature of the rear differential fluid is abnormally high, the SH-AWD indicator comes on. This is not necessarily a problem, but DTC 76-1 will be stored.
^ Check the rear differential fluid level. If it's low, refill it, clear the DTC, and recheck.
1. Clear the DTC with the HDS.
2. Start the engine.
3. Test-drive under these conditions:
^ Vehicle speed at 25 mph (40 km/h) or more
^ Engine speed less than 2500 rpm for at least 30 seconds.
4. Check for DTCs with the HDS.
Is DTC 76-1 indicated?
YES - Go to step 5.
NO - Intermittent failure, the system is OK at this time.
5. Check for DTC 27-1 and DTC 27-2 with the HDS.
Are DTC 27-1 and DTC 27-2 indicated at the same time?
YES - Go to the DTC 27-1 and/or 27-2 troubleshooting first, then recheck. DTC 27-1, DTC 27-2
NO - Go to step 6.
6. 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 7.
7. Check for rear brake drag.
Do the rear brakes drag?
YES - Fix the rear brakes.
NO - Go to step 8.
8. Raise the vehicle.
9. Raise the vehicle speed to 19 mph (30 km/h).
10. Check the hypoid gear speed sensor value with the HDS.
Is the hypoid gear speed sensor value shown?
YES - Check the hypoid gear speed sensor installation. If it is installed properly, replace the rear differential center case.
NO - Go to step 11.
11. Raise the vehicle speed to 19 mph (30 km/h).
12. Measure voltage between SH-AWD control unit connector terminals A5 and A13.
Does the voltage change when the propeller shaft is rotated?
YES - Replace the SH-AWD control unit.
NO - Go to step 13.
13. Turn the ignition switch OFF.
14. Disconnect the hypoid gear speed sensor 3P connector.
15. Turn the ignition switch ON (II).
16. Measure voltage between hypoid gear speed sensor 3P connector terminals No. 1 and No. 3.
Is there 4.0 V or more?
YES - Go to step 17.
NO - Go to step 20.
17. Turn the ignition switch OFF.
18. Disconnect SH-AWD control unit connector A (26P).
19. Check for continuity between SH-AWD control unit connector terminal A2 and hypoid gear speed sensor 3P connector terminal No. 2.
Is there continuity?
YES - Replace the hypoid gear speed sensor.
NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor 3P connector.
20. Turn the ignition switch OFF.
21. Disconnect SH-AWD control unit connector A (26P).
22. Check for continuity between SH-AWD control unit connector terminal A18 and hypoid gear speed sensor 3P connector terminal No. 1.
Is there continuity?
YES - Go to step 23.
NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor connector.
23. Check for continuity between SH-AWD control unit connector terminal A5 and hypoid gear speed sensor 3P connector terminal No. 3.
Is there continuity?
YES - Replace the SH-AWD control unit.
NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed sensor connector.