Ignition "OFF".
Engine "ON".
Start and drive vehicle in gear and maintain vehicle speed is approx. 15km/h or more(9mph or more).
Does warning lamp remain On?
![]() | ▶ 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. |
![]() | ▶ Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. Go to "Verification of Vehicle Repair" procedure. |