Component Tests and General Diagnostics

Rear Differential Function Test

NOTE: Before doing the Rear Differential Function Test, the following conditions must be present.

- No DTCs detected.
- Engine is not running.
- The VTM-4 control unit must be initialized.

1. With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) (A) behind the driver's dashboard lower cover.






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

3. Make sure the HDS communicates with the vehicle and the VTM-4 control unit. If it doesn't, troubleshoot the DLC circuit Testing and Inspection.

4. Confirm that the temperature of the rear differential fluid is between 68 °F (20 °C ) and 140 °F (60 °C ) with the HDS.

5. Turn the ignition switch to LOCK (0) with the shift lever in P.

6. Release the parking brake pedal.

7. Raise and support the vehicle so all four wheels are off the ground Service and Repair.

8. Remove the rear wheels.

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

10. Select MISCELLANEOUS TEST, then select the LEFT CLUTCH ELECTROMAGNETIC COIL TEST with the HDS, and follow the screen prompts. If the results are NORMAL, the left clutch is OK, go to step 11. If the results are ABNORMAL, replace the rear differential.

11. Select MISCELLANEOUS TEST, then select the RIGHT CLUTCH ELECTROMAGNETIC COIL TEST with the HDS, and follow the screen prompts. If the results are NORMAL, the right clutch is OK. If the results are ABNORMAL, replace the rear differential.