Component Inspection

Component Inspection

1. Ignition "OFF".
2. Engine "ON".
3. Start and drive vehicle in gear and maintain vehicle speed is approx. 40 Km/h or more (24 mph or more)
4. Does warning lamp remain ON?
YES
1) Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.
NO
1) Fault is intermittent caused by poor connection in wheel speed sensor harness (RR), Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair as necessary and then go to "Verification of vehicle Repair" procedure.