Ignition System

Symptom	Suspected Cause	Correction
The vehicle ready light (READY light on) is displayed on the cluster, but the engine does not run by the HPCU (HEV module).	Ignition coil fault	Inspect or replace the ignition coil
	Spark plug fault	Inspect or replace the spark plug
	Ignition wiring disconnected or broken	Repair or replace the wiring
Idle is unstable	Ignition wiring fault	Repair or replace the wiring
Idle is unstable	Ignition coil fault	Inspect or replace the ignition coil
Engine hesitates/poor acceleration	Spark plug fault	Inspect or replace the spark plug
Engine hesitates/poor acceleration	Ignition wiring fault	Repair or replace the wiring
Poor fuel efficiency	Spark plug fault	Inspect or replace the spark plug