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TROUBLESHOOTING HEATER, AIR CONDITIONER AND VENTILATION 55-105 Step 18. Check the wiring harness between C-206 • Check the PTC heater relay 1 power supply line for open circuit. Q: Is the check result normal? YES : The trouble can be an intermittent malfunction (Refer to GROUP 00, How to NO : Repair the wiring harness. Step 19. Measure the voltage at C-103 PTC heater (1) Disconnect the connector, and measure at the wiring harness side. (2) Turn the ignition switch to the "ON" position. (3) Disconnect A/C-ECU connector C-105 and earth terminal 46. (4) Voltage between terminal 4 and body earth. OK: System voltage Q: Is the check result normal? YES : Go to Step 28. NO : Go to Step 20. AC310631AF Connector: C-103 <RHD> Harness side AC310618 Connector: C-206 <RHD> AE 3 4 5 1 2 Junction block side Junction block (Front view) AC310631AF Connector: C-103 <RHD> Harness side AC310631AC Connector: C-105 <RHD> Harness side 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 AC309471 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 AC309471 Connector C-105 AE AC310507 Connector C-103 CV |