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1
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INSPECT FUSE
• Switch the ignition off.
• Disconnect the negative battery cable.
• Remove the C/U IG1 15 A fuse.
• Is the fuse normal?
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Yes
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Install the C/U IG1 15 A fuse, then go to the next step.
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No
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If the fuse is blown:
• Refer to the wiring diagram and verify whether or not there is a common connector between C/U IG1 15 A fuse and climate control unit terminal.
If there is a common connector:
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― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
― Repair or replace the malfunctioning part.
If there is no common connector:
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― Repair or replace the wiring harness which has a short to ground.
• Replace the fuse.
If the fuse is damaged:
• Replace the fuse.
Then go to Step 7.
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2
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INSPECT IG1 RELAY FOR MALFUNCTION
• Switch the ignition off.
• Disconnect the negative battery cable.
• Is the IG1 relay normal?
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Yes
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Go to the next step.
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No
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Replace the IG1 relay, then go to Step 7.
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3
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VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION
• Disconnect the climate control unit connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Are the connector and terminals 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/replace the connector or terminal.
After repair procedure, go to Step 7.
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4
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VERIFY FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION
• Disconnect the front body control module (FBCM) connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Are the connector and terminals 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/replace the connector or terminal.
After repair procedure, go to Step 7.
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5
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INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between the following terminals (wiring harness-side):
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― Climate control unit terminal 1D—IG1 relay terminal C
• Is there continuity?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and IG1 relay terminal.
If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open circuit.
Go to Step 7.
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6
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INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between the following terminals (wiring harness-side):
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― Climate control unit terminal 1F—front body control module (FBCM) terminal 1C
• Is there continuity?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and front body control module (FBCM) terminal.
If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open circuit.
Go to the next step.
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7
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VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
• Reconnect the disconnected connectors.
• Connect the negative battery cable.
• Clear DTCs using the M-MDS.
• Perform the climate control unit DTC inspection using the M-MDS.
• Is the same DTC displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the climate control unit.
Go to the next step.
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No
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Go to the next step.
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8
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VERIFY THAT NO OTHER DTCs ARE PRESENT
• Verify other DTCs displayed.
• Are any other DTCs output?
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Yes
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Perform the corresponding DTC inspection.
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No
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DTC troubleshooting completed.
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