Toyota 4Runner: Do-it-yourself maintenance

Emission inspection and maintenance (I/M) programs

Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system. If the malfunction ind ...

Do-it-yourself service precautions

If you perform maintenance by yourself, be sure to follow the correct procedure as given in these sections. CAUTION The engine compartment contains many mechanisms and fluids that may move s ...

Other materials about Toyota 4Runner:

Air Conditioning Control Panel Circuit
DESCRIPTION This circuit consists of the heater control assembly and air conditioning amplifier assembly. When the heater control assembly is operated, signals are transmitted to the air conditioning amplifier assembly through the LIN communication system ...

Relay(for Window Defogger)
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE DEFOGGER RELAY (DEF) (a) Remove the defogger relay from the engine room relay block. Text in Illustration *1 Defogger relay ...