AC–67 AIR CONDITIONING SYSTEM – TROUBLESHOOTING INSPECTION PROCEDURE 1 Check the each LED lights up when the applicable switch is operated. C 1. Push each switch or turn fan sped dial on the A/C control assembly. 2. Check LED lighting according to switch operation. NG OK Proceed to next circuit inspection shown on matrix chart (See page AC–26). All LED OFF YES Check IG switch circuit. NO 2 Check voltage between terminal for LED (OFF) and terminal H12–9 of A/C control assembly. C 1. Push the switch on or OFF. 2. Check voltage between terminal for the LED (OFF) and terminal H12–9 of A/C control assembly. OK Switch Voltage ON Below 1.0 V OFF 10 ~ 14 V H12-9 (GND) N08864 NG OK Repair or replace A/C control assembly. 3 Check continuity of harness between A/C amplifier and A/C control assembly. OK NG Repair or replace harness or connector. Go to step 4 .