Toyota 4Runner manuals

Toyota 4Runner: Back-up Power Source Circuit

DESCRIPTION

The back-up power source circuit for the air conditioning amplifier assembly is shown below. Power is supplied even after the ignition switch is turned off and is used for diagnostic trouble code memory, etc.

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 (AIR CONDITIONING AMPLIFIER - BATTERY)

(a) Disconnect the F42 amplifier connector.


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F42-21 (B) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Rear view of wire harness connector

(to Air Conditioning Amplifier Assembly)


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

IG Power Source Circuit
DESCRIPTION The main power source is supplied to the air conditioning amplifier assembly when the ignition switch is turned to ON. The power source is used for operating the air conditioning ampl ...

Air Conditioning System(for Manual Air Conditioning System)
...

Other materials about Toyota 4Runner:

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) (See page ). (b) Measure the voltage and resistance according to the value(s) in the ...

Driving assist systems
To help enhance driving safety and performance, the following systems operate automatically in response to various driving situations. Be aware, however, that these systems are supplementary and should not be relied upon too heavily when operating the veh ...

© 2016-2020 | www.to4runner.net

0.0066