Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
If any other DTCs present, repair them before continuing with this procedure.

NOTE:
Make sure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read ABS DTCs and record on the repair order.
3. Turn the ignition off.
4. Start the engine.
5. With the scan tool, read ABS DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
CHECK THE FUSE
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the fuse for power.
  Is the fuse good?
  
  Yes
  - Go To 3
  No
  - If the related fuse is open, check the Power circuits for a short to ground.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
POWER CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Turn the ignition on.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
4. With a 12-volt test light connected to ground, check the (F500) Fused Output (Run/Start), (A107) Fused B+ and the (A200) Fused B+ circuits at the ABS Module harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the Power circuits for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
GROUND CIRCUITS OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. With a test light connected to B+ check (Z107) Ground circuits at the ABS harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Anti-lock Brake 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 .
  No
  - Repair the Ground circuits for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .