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:

Room Temperature Sensor Circuit (B1411/11)
DESCRIPTION The cooler thermistor (room temperature sensor) for the front seat is installed in the instrument panel to detect the room temperature and control the heater and air conditioner auto mode. The resistance of the room temperature sensor changes ...

Room Oscillator does not Recognize Key
DESCRIPTION If the room oscillator does not recognize the key, one of the following may be the cause: 1) communication between the indoor No. 1 electrical key antenna (front floor) and electrical key transmitter cannot be performed; 2) communication betwe ...