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

INSPECTION PROCEDURE

1. INSPECT FUSE (A/C)

1. Remove the A/C fuse from the cowl side junction block LH.

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

   Standard resistance:

   Tester Item	Condition	Specified Condition
   A/C fuse	Always	Below 1 Ω

NG	REPLACE FUSE (A/C)

OK

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

1. Disconnect the A/C amplifier connector.

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   J58-1 (B) - Body ground	Always	10 to 14 V

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE