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1
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VERIFY FRONT BODY CONTROL MODULE (FBCM) DTCs AGAIN
• Clear the DTC for the front body control module (FBCM) using the M-MDS.
• Operate the light switch to the OFF position.
• Retrieve the front body control module (FBCM) DTCs using the M-MDS.
• Is the same DTC displayed?
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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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2
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INSPECT HEADLIGHT LO RELAY (RH)
• Switch the ignition off.
• Disconnect the negative battery cable.
• Remove the headlight LO relay (RH).
• Inspect the headlight LO relay (RH).
• Is the headlight LO relay (RH) 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 headlight LO relay (RH), then go to Step 6.
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3
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INSPECT FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION
• Disconnect the front body control module (FBCM) connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is the connector 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 connector, then go to Step 6.
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4
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INSPECT FOR SHORT TO GROUND IN HEADLIGHT LO RELAY (RH) CONTROL CIRCUIT
• Verify that the headlight LO relay (RH) is removed.
• Verify that the front body control module (FBCM) connector is disconnected.
• Inspect for continuity between front body control module (FBCM) terminal 2V (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Refer to the wiring diagram and verify whether or not there is a common connector between headlight LO relay (RH) terminal E and front body control module (FBCM) terminal 2V.
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 a short to ground.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has a short to ground.
Go to Step 6.
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No
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Go to the next step.
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5
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INSPECT FOR OPEN CIRCUIT IN HEADLIGHT LO RELAY (RH) CONTROL CIRCUIT
• Verify that the headlight LO relay (RH) is removed.
• Verify that the front body control module (FBCM) connector is disconnected.
• Inspect the wiring harness for continuity between headlight LO relay (RH) terminal E (wiring harness-side) and front body control module (FBCM) terminal 2V (wiring harness-side).
• 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 headlight LO relay (RH) terminal E and front body control module (FBCM) terminal 2V.
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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6
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Always reconnect all disconnected connectors.
• Reconnect the negative battery cable.
• Clear the DTC for the front body control module (FBCM) using the M-MDS.
• Operate the light switch to the OFF position.
• Retrieve the front body control module (FBCM) DTCs 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 front body control module (FBCM).
Go to the next step.
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No
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Go to the next step.
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7
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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