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1
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INSPECT ELECTRICAL SUPPLY UNIT (ESU) CONNECTOR CONDITION
• Switch the ignition off.
• Disconnect the negative battery cable.
• Disconnect the electrical supply unit (ESU) 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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With front combination light (bulb type):
• Go to the next step.
With front combination light (LED type):
• Go to Step 3.
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No
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Repair or replace the connector, then go to Step 6.
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2
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VISUALLY INSPECT HEADLIGHT HI/LO BULB (LH)
• Visually inspect the headlight HI/LO bulb (LH).
• Is the headlight HI/LO bulb (LH) 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 HI/LO bulb (LH), then go to Step 6.
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3
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INSPECT FRONT COMBINATION LIGHT (LH) CONNECTOR CONDITION
• Disconnect the front combination light (LH) 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 HEADLIGHT LO (LH) CONTROL CIRCUIT FOR SHORT TO GROUND
• Verify that the front combination light (LH) and electrical supply unit (ESU) connectors are disconnected.
• Inspect for continuity between front combination light (LH) terminal B (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 front combination light (LH) terminal B and electrical supply unit (ESU) terminal 4E.
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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With front combination light (bulb type):
• Go to Step 6.
With front combination light (LED type):
• Go to the next step.
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5
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VERIFY IF MALFUNCTIONING LOCATION IS FRONT COMBINATION LIGHT (LH) DEPENDING ON REPEATABILITY
• Always reconnect all disconnected connectors.
• Connect the negative battery cable.
• Clear the DTC for the electrical supply unit (ESU) using the M-MDS.
• Operate the light switch to the HEAD position and the dimmer switch to LO position.
• Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.
• Is the same DTC displayed?
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Yes
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Replace the front combination light (LH), then 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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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Always reconnect all disconnected connectors.
• Connect the negative battery cable.
• Clear the DTC for the electrical supply unit (ESU) using the M-MDS.
• Operate the light switch to the HEAD position and the dimmer switch to LO position.
• Retrieve the electrical supply unit (ESU) 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 electrical supply unit (ESU).
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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