Rear Differential Function Test

WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

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

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

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

Fig 1: Identifying Data Link Connector (DLC)
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 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.
Release the parking brake pedal.
Raise the vehicle on the lift so all four wheels are off the ground.
Remove the rear wheels.
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 9. 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.