Rear Differential Function Test

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

With the ignition switch in LOCK (0), connect the HDS to the DLC (A) located under the driver's side of the dashboard.

Fig 1: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II).
Make sure the HDS communicates with the VTM-4 control unit. If it doesn't go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
Confirm that the temperature of the differential fluid is between 68°F (20°C) and 140°F (60°C) with the HDS.
Turn the ignition switch to LOCK (0) with the shift lever in P.
Raise and support the vehicle so all four wheels are off the ground (see LIFT AND SUPPORT POINTS ).
Remove the rear wheels.
Release the parking brake.
Turn the ignition switch to ON (II).
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.
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.