76-1

SH-AWD DTC Troubleshooting: 76-1

DTC 76-1: Rear Differential Fluid Overheats

NOTE:

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

- 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. Rear Differential Fluid Inspection and Replacement If it's low, refill it, clear the DTC, and recheck.

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

2. Make sure the HDS communicates with vehicle and the SH-AWD control unit. If it doesn't, troubleshoot the DLC circuit. Testing and Inspection

3. 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 4.


4. Clear the DTC with the HDS.

5. Start the engine.

6. Test-drive the vehicle at 10 mph (15 km/h).

7. Check for WHEEL SPEED in the DATA LIST with the HDS.

Are all wheel speed the same?
YES - Intermittent failure, the system is OK at this time.

NO - Go to step 8.


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

9. Check for rear brake drag.

Are the rear brakes OK?
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 - Repair the rear brakes. Component Tests and General Diagnostics