Initial Inspection and Diagnostic Overview

Special Tool(s)

Inspection and Verification





Anti-Lock Quick Check Sheet Using EEC-IV 60-Pin Breakout Box
1. Verify the customer concern by operating the vehicle and applying the brakes under different conditions to duplicate the condition.
2. Visually inspect for obvious signs of mechanical or electrical damage.





Visual Inspection Chart

3. If the inspection reveals an obvious concern(s) that can be readily identified, repair as required.
4. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
^ Verify that the battery voltage is between 10 and 16 volts.

5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
6. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
^ SCP, UBP, CAN, or with; all electronic control units no response/not equipped, refer to Information Bus (Module Communications Network).
^ No response/not equipped for the ABS module, GO to Pinpoint Test L. L: No Communication With the Anti-Lock Brake System (ABS) Module
^ System passed, retrieve and record the continuous Diagnostic Trouble Codes (DTC's), erase the continuous DTC's, and carry out self-test diagnostics for the ABS module.

7. If the DTC's retrieved are related to the concern, refer to the Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index to continue diagnosis. Diagnostic Trouble Code Tests and Associated Procedures
8. If no DTC's related to the concern are retrieved; Refer to Symptom Chart; Symptom Related Diagnostic Procedures