Toyota 4Runner manuals

Toyota 4Runner: Problem Symptoms Table



  • 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.
Tire Pressure Warning System


Suspected Area

See page

Tire pressure warning light does not illuminate despite tire pressure decreasing

Check Data List (Tire inflation pressure)

ID code check (Registration)

Tire pressure warning light remains illuminated (Goes off during initial check)

Tire pressure warning light circuit

ECU power source circuit

Tire pressure warning light remains illuminated (Comes on during initial check)

Check Data List (Tire inflation pressure)

Tire pressure adjustment

ID code check (Registration)

DTC check cannot be performed

TC and CG terminal circuit

ECU power source circuit

Test Mode Procedure
TEST MODE PROCEDURE 1. PERFORM SIGNAL CHECK HINT: When entering signal check mode, the tire pressure warning ECU stores all the signal check DTCs first. After completing the signal chec ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK TIRE PRESSURE WARNING ECU HINT: Inspect the connector from the back side. (a) Disconnect the F7 ECU connector. (b) Measure the voltage according to the value(s) in the ...

Other materials about Toyota 4Runner:

Open or Short in Master Cylinder Pressure Sensor (C1421,C1281,C1423,C1424)
DESCRIPTION DTC Code DTC Detection Condition Trouble Area C1421 Either condition is met: Both of the following conditions continue for at least 1.2 seconds. The IG1 terminal volta ...

REMOVAL PROCEDURE 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ). 2. DISCONNECT CABLE FROM POSITIVE BATTERY TERMINAL 3. REMOVE BAT ...

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