Flow of Diagnosis

Inspection and Verification
1. Verify the customer concern by applying the brakes under different conditions.





2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the fault is not visually evident, connect the tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the tester menu. If the tester does not communicate with the vehicle:
1. check that the program card is correctly installed.
2. check the connections to the vehicle.
3. check the ignition switch position.
4. If the tester still does not communicate with the vehicle, refer to the tester manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the tester responds with:
1. CKT914, CKT915, or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to COMMUNICATIONS NETWORK.
2. NO RESP/NOT EQUIP for anti-lock brake control module, go to PINPOINT TEST 1: NO COMMUNICATION WITH THE MODULE/ANTI-LOCK BRAKE CONTROL MODULE. Pinpoint Test 1 - No COMM With the ABS Control Module
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the anti-lock brake control module.
6. If the DTCs retrieved are related to the concern, go to Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index to continue diagnostics. Diagnostic Trouble Code Descriptions
7. If no DTCs related to the concern are retrieved, proceed to TROUBLESHOOTING INDEX. Diagnosis By Symptom