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POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER HAC-151 < DTC/CIRCUIT DIAGNOSIS > [MANUAL A/C (TYPE 1)] C D E F G H J K L M A B HAC N O P SYMPTOM: A/C system does not come on. 1. CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL 1. Turn ignition switch ON. 2. Check voltage between front air control harness connector M180 (B) terminal 15 and M181 (A) terminal 27, and ground. Is the inspection result normal? YES >> GO TO 2. NO >> Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to . • If fuses are OK, check harness for open circuit. Repair or replace as necessary. • If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces- sary. 2. CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL 1. Turn ignition switch OFF. 2. Disconnect front air control connectors. 3. Check continuity between front air control harness connector M181 terminal 35 and ground. Is the inspection result normal? OK >> Replace front air control. Refer to NG >> Repair harness or connector. AWIIA0438GB Terminals Ignition switch position (+) (-) OFF ACC ON Front air control connector Terminal No. M180 15 Ground Approx. 0V Approx. 0V Battery M181 27 Battery Battery Battery AWIIA1047ZZ 35 - Ground : Continuity should exist. AWIIA0440ZZ |