The numbers below refer to the step numbers on the diagnostic table.
Helps determine whether the front axle switch is functioning properly.
Helps determine whether the front axle switch is locking and unlocking.
Tests transfer case clutch performance.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Transfer Case Control Schematics | |||
1 | Was the Transfer Case Diagnostic System Check performed? | Go to Step 2 | |
Does the scan tool display the Front Axle Switch status as Locked? | Go to Step 3 | ||
Does the scan tool display the Front Axle Switch status as Locked? | Go to Step 4 | Go to Step 6 | |
Are the rpm values approximately equal at the same speeds? | Go to Step 6 | Go to Step 5 | |
5 | Inspect the front axle and transfer case for a mechanical malfunction. Repair/Replace as needed. Is the repair complete? | Go to Step 7 | -- |
6 | Replace the transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement . Is the repair complete? | Go to Step 7 | -- |
7 |
Does the symptom re-occur? | Go to Step 2 | System OK |