POWER INTEGRATION SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of the problem symptom. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

No. 1 Semiconductor Power Integration ECU
Symptom	Suspected Area	Link
Headlights do not illuminate	Lighting system	Click here
Heater does not operate	Air conditioning system	Click here
Air conditioning system does not operate	Air conditioning system	Click here

No. 2 Semiconductor Power Integration ECU (w/ PTC Heater)
Symptom	Suspected Area	Link
PTC heater does not operate	Air conditioning system	Click here

No. 3 Semiconductor Power Integration ECU
Symptom	Suspected Area	Link
Stop lights does not illuminate	Lighting system	Click here
	Electronically controlled brake system (w/ Vacuum Brake Booster)	Click here
	Electronically controlled brake system (w/o Vacuum Brake Booster)	Click here
	Dynamic radar cruise control system	Click here
	Pre-collision system	Click here
Rear taillights does not illuminate	Lighting system	Click here
Rear fog lights does not illuminate (w/ Rear Fog Light)	Lighting system	Click here
Back-up light does not illuminate	Lighting system	Click here
Back-up light does not illuminate	Electronic shift lever system	Click here
Rear defogger does not operate	Window defogger system	Click here