Up to 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: IG Power Source Circuit
- IG Power Source Circuit

DESCRIPTION

The main power source is supplied to the A/C amplifier when the power switch is turned on (IG).

The power source is used for operating the A/C amplifier and servo motor, etc.

WIRING DIAGRAM





INSPECTION PROCEDURE

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

HINT
Start the engine before inspection. Check the IG1 NO. 2 relay or battery if the engine does not start.

PROCEDURE

1. INSPECT A/C AMPLIFIER

(a) Remove the A/C amplifier with the connectors still connected.





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

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)

(a) Disconnect the A/C amplifier connector.





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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)

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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE A/C AMPLIFIER Removal