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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 air conditioning amplifier is shown below. Power is supplied even when turning the power switch OFF and is used for diagnostic trouble code memory, etc.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (A/C)
(a) Remove the A/C fuse from the passenger side junction block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)





(a) Disconnect the L76 air conditioning amplifier connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
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