Air Conditioning System Back-Up Power Source Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (A/C)
INSPECT AIR CONDITIONING AMPLIFIER (A/C AMPLIFIER - BODY GROUND)
AIR CONDITIONING SYSTEM - 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
Remove the A/C fuse from the cowl side junction block LH.
Measure the resistance of the fuse.
- Standard resistance:
Tester Item
| Condition
| Specified Condition
|
A/C fuse
| Always
| Below 1 Ω
|
| | CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE |
|
|
| 2.INSPECT AIR CONDITIONING AMPLIFIER (A/C AMPLIFIER - BODY GROUND) |
Disconnect the L52 A/C amplifier connector.
Measure the voltage of the wire harness side connector.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
L52-1 (B) - Body ground
| Always
| 10 to 14 V
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| OK |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
