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B1080–AUXILIARY COOLANT PUMP CONTROL CIRCUIT OPEN (MTC) (CONTINUED) For the Manual Temperature Control (MTC) circuit diagram (Refer to 24 - HEATING & AIR CONDITIONING - SCHE- For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT SHORTED TO VOLTAGE (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT OPEN (Z931) GROUND CIRCUIT OPEN AUXILIARY COOLANT PUMP A/C HEATER CONTROL NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC Diagnostic Test 1. CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C43) Auxiliary Coolant Pump Driver cir- Is the voltage above 0.2 volts? Yes >> Repair the (C43) Auxiliary Coolant Pump Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. No >> Go To 2 HB HVAC - ELECTRICAL DIAGNOSTICS 24 - 293 |