3.
Does warning lamp remain On?
YES
a.
Substitute with a known-good ECM and check for proper operation. If problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure. If NG, replace HECU and then go to "Verification of Vehicle Repair" procedure
NO
a.
Fault is intermittent caused by faulty ECM and/or faulty HECU or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.
