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*NO RESPONSE FROM HVAC (MTC) (CONTINUED) 3. (Z24) GROUND CIRCUIT OPEN Turn the ignition off. Using a 12-volt test light connected to 12-volts, check the (Z24) Does the test light illuminate brightly? Yes >> Go To 4 No >> Repair the (Z24) ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. 4. (D55) AND (D54) CAN B BUS CIRCUITS OPEN NOTE: One open circuit will not cause this condition. Measure the voltage between the (D55) CAN B Bus (+) circuit and Is there any voltage present on either circuit? Yes >> Replace the A/C Heater Control in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. No >> Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage. Perform BODY VERIFICATION TEST - VER 1. HB ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 153 |