Diagnostic Procedure
- If ABS warning light stays on, go to next step. If ABS warning light does not illuminate, check light bulb and replace as necessary. If bulb is okay, diagnose combination meter. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
- Remove ABS/TRAC solenoid relay from relay block, located in engine compartment at front of vehicle. See Figure. Check continuity between specified ABS/TRAC solenoid relay terminals. See Fig 1. Continuity should exist between terminals No. 2 and 3. Continuity should not exist between terminals No. 1 and 3. Check resistance between terminals No. 4 and 6. Resistance should be 80 ohms. Replace relay if solenoid relay does not test as described.
- If relay tests as described, apply battery voltage between terminals No. 4 and 6. Check continuity between relay terminals No. 1 and 3. Continuity should exist. Check continuity between relay terminals No. 2 and 3. Continuity should not exist. Check for continuity between terminals No. 3 and 5. If continuity does not exist, reverse test leads and recheck relay for continuity. If continuity does not exist, replace ABS/TRAC solenoid relay. If continuity exists, check for open circuit in wiring harness between DLC1, ABS/TRAC solenoid relay and ground. Repair as necessary. See WIRING DIAGRAMS .
- Retrieve DTCs. See RETRIEVING DTCS under DIAGNOSIS & TESTING. If DTC is present, perform appropriate test under DIAGNOSTIC TESTS . If DTC is not present, and ABS warning light is off, go to next step. If ABS warning light does not turn off, check for short circuit in wiring harness between ABS warning light, DLC1 and ABS/TRAC ECU. Repair as necessary. See WIRING DIAGRAMS .
- Check ABS/TRAC solenoid relay. See steps 2- 3
for test procedures. Replace relay as necessary. If relay is okay, check for short circuit in wiring harness between DLC1 and ABS/TRAC solenoid relay. Repair as necessary. See WIRING DIAGRAMS .
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