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:

Relay(w/ Ptc Heater)
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE PTC HEATER RELAY (PTC NO. 1, PTC NO. 1, PTC NO. 3) (a) Remove the 3 PTC heater relays from the engine room relay block. Text in Illustration *1 ...

Front Speed Sensor RH Malfunction (C1401,C1271,C1272,C1402)
DESCRIPTION The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for brake control. The speed sensor rotors have rows of alternating N and S magnetic poles and their magnetic fields ch ...