Anti-Lock Brakes with Traction Control and Stability Assist

Inspection and Verification
1. Verify the customer concern.
2. Verify the base brake system operates correctly by pressing and releasing the brake pedal with the ignition switch in the OFF position. If the stoplamps operate correctly, proceed to the next step.
3. Verify the base brake system operates correctly. If any concerns are present, address them before continuing with any ABS concerns. If the stoplamps operate correctly, proceed to the next step.
4. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart:

5. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
6. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
^ check the connections to the vehicle.
^ check the ignition switch position.
7. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
8. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
^ CAN circuit fault; all electronic control units no response/not equipped, refer to Information Bus.
^ No response/not equipped for the ABS module, GO to Pinpoint Test K. K: No Communication With the Anti-Lock Brake System (ABS) Module
^ System passed, retrieve and record the continuous diagnostic trouble codes (DTCs). Erase the continuous DTCs. Test drive the vehicle. Be sure to include at least one stop that includes ABS activation.
9. If the DTCs retrieved are related to the concern, go to the Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index. Diagnostic Trouble Code Tests and Associated Procedures
10. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures

NOTE: The need to recalibrate the module is indicated by the active/fail lamp flashing. There are other service actions that can require recalibration when there is no flashing lamp.