Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
This DTC must be active for the results of this test to be valid.
1. Perform any Service Bulletins that may apply.
2. Turn the ignition on.
3. With the scan tool, read ABS DTCs and record on the repair order.
4. With the scan tool, read and record Environmental Data.
5. With the scan tool, erase ABS DTCs.
6. Start the engine.
7. Press the Electronic Stability Control switch (ESC) on.
8. Press the ESC switch off.
9. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
ELECTRONIC STABILITY CONTROL (ESC) SWITCH
1. Turn the ignition off.
2. Disconnect the ESC Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Does the DTC remain active?
  
  Yes
  - Go To 3
  No
  - Replace the Electronic Stability Control (ESC) Switch in accordance with the Service Information. Refer to SWITCH, ELECTRONIC STABILITY PROGRAM (ESP), DESCRIPTION .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
ESC ON/OFF SENSE CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (B45) ESC ON/OFF Switch Sense circuit at the ABS Module harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (B45) ESC ON/OFF Sense circuit for a short to voltage.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Anti-lock Bake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .