COMBUSTION TYPE POWER HEATER SYSTEM PROBLEM SYMPTOMS TABLE

Tip:

Use the table below to help determine the cause of problem symptoms. 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Table 1. Combustion Type Power Heater System
Symptom	Suspected Area	See page
Heater assembly does not operate	Proceed to ECU Power Source Circuit	Click here
	Proceed to Power Heater Switch Circuit	Click here
	Proceed to Power Heater Fuel Pump Circuit	Click here
	Proceed to Power Heater Alternator Circuit	Click here
	Replace heater assembly	Click here