Verify customer concern by operating system.
Ensure master cylinder reservoir is full and parking brake is fully released. Inspect HCU, ABS relay, brake position switch, wheel speed sensors and brake lines for damage. Inspect wheel bearings for looseness or damage. Repair items as necessary. Ensure all ABS system fuses are okay. See WIRING DIAGRAMS. Check ABS warning indicator bulb. Check for damage to wiring harness. Check for loose or corroded connectors. Make necessary repairs.
Inspect parking brake cable or wear or damage. Inspect tire pressure, and tire size or mismatched tires.
Inspect maxi-fuse No. 24 (60-amp) and mini-fuse No. 14 (25-amp) in battery junction box. Inspect fuses No. 5 (5-amp) and 24 (15-amp) in central junction box.
If problem remains after inspection, retrieve trouble codes. See RETRIEVING DIAGNOSTIC TROUBLE CODES. If DTCs are retrieved, go to DIAGNOSTIC TROUBLE CODE INDEX table. Perform appropriate test. If no DTCs related to concern are retrieved, see SYMPTOM DIAGNOSIS. If ABS control module cannot be accessed using scan tool, see appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
Monday, March 9th, 2009 AT 9:49 AM