Back-up Power Source Circuit: Procedure
WARNING: This page is about a different variant/trim than selected.
- INSPECT FUSE (A/C NO. 1)
- Remove the A/C NO. 1 fuse from the instrument panel junction block.
- Measure the resistance of the fuse.
Standard resistance
Tester Connection Condition Specified Condition A/C NO. 1 fuse Always Below 1 Ω
NG → REPLACE FUSE
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)
- Disconnect the D37 and D38 amplifier connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
Tester Connection Condition Specified Condition D37-21 (B) - Body ground Always 11 to 14 V D38-24 (+B2) - Body ground Always 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)
- Disconnect the D37 and D38 amplifier connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition D37-14 (GND) - Body ground Always Below 1 Ω D38-20 (GND2)* - Body ground Always Below 1 Ω *: w/ Rear Air Conditioning
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 4
- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE