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B27F0 REFRIGERANT CHANNEL SWITCHING 2 WAY TYPE VALVE HAC-155 < DTC/CIRCUIT DIAGNOSIS > [AUTO A/C (WITH HEAT PUMP)] C D E F G H J K L M A B HAC N O P Is the inspection result normal? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK REFRIGERANT CHANNEL SWITCHING 2 WAY TYPE VALVE CONTROL CIRCUIT FOR SHORT (BATTERY) 1. Turn power switch ON. 2. Check continuity between heat pump control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair harness or connector. 3. CHECK REFRIGERANT CHANNEL SWITCHING 2 WAY TYPE VALVE CONTROL CIRCUIT FOR SHORT (GROUND) 1. Turn power switch OFF. 2. Check continuity between heat pump control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> Repair harness or connector. 4. CHECK REFRIGERANT CHANNEL SWITCHING 2 WAY TYPE VALVE POWER SUPPLY 1. Turn power switch ON. 2. Check continuity between refrigerant channel switching 2 way type valve harness connector and ground. Is the inspection result normal? YES >> GO TO 6. NO >> GO TO 5. 5. CHECK A/C RELAY CIRCUIT Check A/C relay circuit. Refer to EVC-385, "Diagnosis Procedure" . Is the inspection result normal? YES >> Repair harness or connector between A/C relay and refrigerant channel switching 2 way type valve. NO >> Repair or replace malfunctioning components. 6. CHECK HEAT PUMP CONTROL UNIT COMMUNICATION LINE FOR OPEN Refrigerant channel switching 2 way type valve Heat pump control unit Continuity Connector Terminal Connector Terminal E90 2 M102 6 Yes + − Voltage (Approx.) Heat pump control unit Connector Terminal M102 6 Ground 0 V Heat pump control unit — Continuity Connector Terminal M102 6 Ground No + − Voltage (Approx.) Refrigerant channel switching 2 way type valve Connector Terminal E90 1 Ground Battery voltage |