Control Module HVAC: Testing and Inspection

Auto Amp. Check
Check power supply circuit for auto amp. with ignition switch ON. Measure voltage across terminal Nos. 26, 27, 33 and body ground.

If OK, check auto amp.
- If NG, check 7.5 A fuses [Nos. 11 and 24, located in the fuse block - junction box (J/B)] and 15 A fuses [Nos. 1 and 2, located in the fuse block - junction box (J/B)].
- If fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.
- If fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.







Check body ground circuit for auto amp. with ignition switch OFF. Check for continuity between terminal Nos. 32, 14 and body ground.

NOTE:
If OK, replace auto amp.
If NG, repair or replace harness.