Back-Up Power Source Circuit

AIR CONDITIONING: AIR CONDITIONING SYSTEM: Back-up Power Source Circuit
- Back-up Power Source Circuit

DESCRIPTION

The back-up power source circuit for the A/C amplifier is shown below. Power is supplied even when turning the engine switch off and is used for diagnostic trouble code memory, etc.

WIRING DIAGRAM







PROCEDURE

1. INSPECT FUSE (A/C)

(a) Remove the A/C fuse from the cowl side junction block LH.

(b) Measure the resistance of the fuse.

Standard resistance:





NG -- CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE
OK -- Continue to next step.

2. INSPECT AIR CONDITIONING AMPLIFIER (AIR CONDITIONING AMPLIFIER - BODY GROUND)





(a) Disconnect the K52 A/C amplifier connector.

(b) Measure the voltage of the wire harness side connector.

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE