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HAC-202 < DTC/CIRCUIT DIAGNOSIS > [MANUAL AIR CONDITIONING] REAR A/C CONTROL COMMUNICATION SIGNAL NAL 1. Turn ignition switch OFF. 2. Disconnect A/C amp. connector. 3. Turn ignition switch ON. 4. Check voltage between A/C amp. harness connector and ground. Is the inspection result normal? YES >> Replace front A/C control (A/C amp.). Refer to HAC-238, "Removal and Installation" . NO >> GO TO 6. 6. CHECK COMMUNICATION SIGNAL (A/C AMP. → REAR A/C CONTROL) CIRCUIT FOR OPEN 1. Turn ignition switch OFF. 2. Disconnect rear A/C control connector. 3. Check continuity between rear A/C control harness connector and A/C amp. harness connector. Is the inspection result normal? YES >> GO TO 7. NO >> Repair harness or connector. 7. CHECK COMMUNICATION SIGNAL (A/C AMP. → REAR A/C CONTROL) CIRCUIT FOR SHORT Check continuity between rear A/C control harness connector and ground. Is the inspection result normal? YES >> Check rear A/C control power supply circuit. Refer to HAC-200, "REAR A/C CONTROL : Diagno- NO >> Repair harness or connector. + − Voltage (Approx.) A/C amp. Connector Terminal M49 32 Ground 5 V Rear A/C control A/C amp. Continuity Connector Terminal Connector Terminal R16 9 M49 32 Existed Rear A/C control — Continuity Connector Terminal R16 9 Ground Not existed |