AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) > Back-up Power Source Circuit

for Preparation Click here


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


E227740E03


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)


    E170963E30

  1. Disconnect the A38 air conditioning amplifier assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A38-5 (+B1) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Air Conditioning Amplifier Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)