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1
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VERIFY PCM DTC
• Perform the DTC inspection for the PCM.
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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2
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VERIFY BODY CONTROL MODULE (BCM) DTC
• Perform the DTC inspection for the body control module (BCM).
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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3
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VERIFY DASH-ELECTRICAL SUPPLY UNIT DTC
• Perform the DTC inspection for the dash-electrical supply unit.
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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4
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DETERMINE IF MALFUNCTION CAUSE IS MAGNETIC CLUTCH OR OTHER
• Start the engine and idle it.
• Turn the A/C switch on.
• Does the magnetic clutch disengage?
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Yes
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Go to Step 8.
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No
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Go to the next step.
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5
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INSPECT IF MALFUNCTION CAUSE IS MAGNETIC CLUTCH POWER SUPPLY CIRCUIT OR MAGNETIC CLUTCH
• Verify that the A/C relay is removed.
• Switch the ignition off.
• Disconnect the magnetic clutch connector.
• Start the engine and idle it.
• Does the magnetic clutch disengage?
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Yes
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Go to the next step.
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No
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Go to Step 7.
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6
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INSPECT MAGNETIC CLUTCH POWER SUPPLY CIRCUIT FOR SHORT TO POWER SUPPLY
• Inspect the applicable circuit for a short to power supply.
• Is the circuit normal?
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Yes
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Go to repair completion verification.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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7
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INSPECT MAGNETIC CLUTCH CLEARANCE
• Verify the magnetic clutch clearance.
• Is the magnetic clutch clearance normal?
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Yes
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Inspect the magnetic clutch to see if it is stuck.
• If there is any malfunction:
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― Repair or replace the malfunctioning location and perform the repair completion verification.
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No
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Adjust the magnetic clutch clearance and perform the repair completion verification.
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8
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DETERMINE IF MALFUNCTION CAUSE IS A/C RELAY CONTROL SIGNAL OR A/C REQUEST SIGNAL
• Access the PCM PID A/C_SW using the M-MDS.
• Monitor the PID A/C_SW while turning on and off the air conditioner using the switch on the control panel.
• Is the A/C_SW PID value always ON?
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Yes
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Climate control unit always transmits A/C request signal.
• Replace the climate control unit and perform the repair completion verification.
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No
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Go to the next step.
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9
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INSPECT A/C RELAY FOR MALFUNCTION
• Inspect the applicable part.
• Is the part normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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10
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INSPECT A/C RELAY CONTROL CIRCUIT FOR SHORT TO GROUND
• Inspect the applicable circuit for a short to ground.
• Is the circuit normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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Repair completion verification 1
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting. (Explain contents of repair to customer)
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No
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
• If the CAN communication is normal, perform the diagnosis from Step 1.
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― If the malfunction recurs, go to the next step.
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Repair completion verification 2
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VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING
• Verify repair information and verify that there is a new calibration in the PCM.
• Is there a new calibration in the PCM?
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Yes
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Perform the PCM reprogramming and verify if the malfunction symptom was corrected.
• If the malfunction recurs, replace the PCM.
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No
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Replace the PCM.
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