AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) > IG Power Source Circuit

for Preparation Click here


DESCRIPTION

This is the main power source supplied to the air conditioning amplifier when the ignition switch is ON. This power source is used for operating components, such as the air conditioning amplifier and servo motors.

WIRING DIAGRAM


E191848E01


INSPECTION PROCEDURE

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

1.INSPECT AIR CONDITIONING AMPLIFIER


    E118637E24

  1. Disconnect the D15 air conditioning amplifier connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D15-1 (IG+) - D15-14 (GND)
    		Ignition switch ON
    		11 to 14 V

  1. Reconnect the air conditioning amplifier connector.
    Text in Illustration 
    *1
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier)

Result 
Result
Proceed to
OK
A
NG
(w/o Stop and Start System)
B
NG
(w/ Stop and Start System)
C


B
Go to step 2

C
GO TO STOP AND START SYSTEM (Click here)
A

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

2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)


    E118637E25

  1. Disconnect the D15 air conditioning amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D15-14 (GND) - Body ground
    		Always
    		Below 1 Ω

  1. Reconnect the air conditioning amplifier connector.
    Text in Illustration 
    *1
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 NO. 1 RELAY - AIR CONDITIONING AMPLIFIER)