Initial Inspection and Diagnostic Overview

Verify the customer concern by applying the brakes under different conditions.
2. Visually inspect for obvious signs of mechanical and electrical damage.
Mechanical
- Parking brake cable
- Tire pressure
- Tire size or mismatched tires
Electrical
- Blown fuse:
- Fuse junction panel fuse 14 (10A)
- Power distribution box maxi-fuse 3 (5OA)
- Power distribution box mini-fuse 7 (30A)
- Connectors or connections
- Harness routing
- wire chafing
- Circuitry open/shorted

NOTE: A scan tool MUST be used to diagnose the ABS system. There is NO provision for flashout of DTCs.

3. If the fault is not visually evident, connect the New Generation STAR (NGS) Tester to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If the NGS does not communicate with the vehicle:
- check that the program card is properly installed.
- check the connections to the vehicle.
- check the ignition switch position.

4. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
- CKT9 14, CKT9 15, or CKT70 = ALL ECUS NO RESP/NOT EQUIP, diagnose the communications network.
- NO RESP/NOT EQUIP for anti-lock brake control module, go to Pinpoint Test F. F Check Circuits 601, 483, 57
- SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform 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.
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart. Symptom Related Diagnostic Procedures