Toyota 4Runner: ECU Power Source Circuit

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/o Smart Key System) / ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the transponder key ECU assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY AND BODY GROUND)

(a) Disconnect the F34 ECU connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F34-1 (+B) - Body ground	Always	11 to 14 V
F34-2 (IG) - Body ground	Ignition switch off	Below 1 V
F34-2 (IG) - Body ground	Ignition switch ON	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
F34-16 (GND) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Transponder Key ECU Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Security Indicator Light Circuit

DESCRIPTION When the engine immobiliser system is set, the security indicator light blinks continuously, but does not illuminate if the engine immobiliser system is not set. WIR ...

Id Code Box

Components COMPONENTS ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL ID CODE BOX (a) Attach the 2 claws and move the ID code box in the direction of the arrow. ...

Other materials about Toyota 4Runner:

Steering Angle Sensor Circuit (C15F1)
DESCRIPTION The power steering ECU assembly receives steering angle signals from the steering angle sensor via CAN communication. The power steering ECU assembly provides appropriate assisting force in accordance with the steering angle signal. ...

Seat belts
Make sure that all occupants are wearing their seat belts before driving the vehicle. Correct use of the seat belts • Extend the shoulder belt so that it comes fully over the shoulder, but does not come into contact with the neck or slide off the sho ...