Diagnostic Test

VERIFY THE DTC IS ACTIVE
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read and record the DTCs.
3. With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set.
4. With the scan tool, erase the DTCs.
5. Start the engine.
6. Shift the transmission into Reverse.
7. With the scan tool, read and the DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Perform the ABS INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
REVERSE GEAR SWITCH OPERATION
1. Turn the ignition on.
2. With the scan tool, actuate the reverse gear switch.
  Does the reverse gear switch actuate correctly?
  
  Yes
  - Replace the Anti-lock Brake System (ABS) Module in accordance with the service information. Refer to REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Reverse Gear Switch in accordance with the service information. Refer to SHIFTER, TRANSMISSION, REMOVAL for automatic transmissions, or SWITCH, BACKUP LAMP, REMOVAL for manual transmissions.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .