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HAC-36 < COMPONENT DIAGNOSIS > [MANUAL AIR CONDITIONER] PTC HEATER CONTROL SYSTEM NO >> GO TO 4. 4. CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC CONTROL UNIT 1. Turn ignition switch OFF. 2. Disconnect PTC control unit connector. 3. Check continuity between PTC control unit harness connector Is the inspection result normal YES >> GO TO 5. NO >> GO TO 7. 5. CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC HEATER 1. Disconnect PTC heater connector. 2. Check continuity between PTC relay-1 harness connector E61 Is the inspection result normal YES >> GO TO 6. NO >> Repair harness or connector. 6. CHECK PTC HEATER GROUND CIRCUIT Check continuity between PTC heater harness connector M66 termi- Is the inspection result normal YES >> Replace PTC heater. Refer to XX. NO >> Repair harness or connector. 7. CHECK POWER SUPPLY VOLTAGE FOR PTC CONTROL UNIT 1. Turn ignition switch ON. 2. Check voltage between PTC control unit harness connector Is the inspection result normal YES >> GO TO 8. A B Continuity Connector Terminal Connector Terminal PTC control unit: M84 2 PTC relay-1: E61 1 Yes AWIIA0456ZZ A B Continuity Connector Terminal Connector Terminal PTC relay-1: E61 5 PTC heater: M66 1 Yes SJIA0915E Connector Terminal Ground Continuity PTC heater: M66 2 Yes SJIA0916E Terminals Voltage (Approx.) (+) ( − ) Connector Terminal Ground Battery voltage PTC control unit: M84 1 SJIA0911E |