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1
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VERIFY FRONT BODY CONTROL MODULE (FBCM) DTCs AGAIN
• Clear front body control module (FBCM) DTCs using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Perform the front body control module (FBCM) DTC inspection using the M-MDS.
• Is the DTC U0231:68 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 9.
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2
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INSPECT AUTO-LIGHT SENSOR/RAIN SENSOR CONNECTOR CONDITION
• Switch the ignition to off.
• Disconnect the negative battery cable.
• Disconnect the auto-light sensor/rain sensor 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 8.
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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 8.
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4
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INSPECT AUTO-LIGHT SENSOR/RAIN SENSOR CIRCUIT FOR SHORT TO GROUND
• Verify that the auto-light sensor/rain sensor and front body control module (FBCM) connectors are disconnected.
• Inspect for continuity between front body control module (FBCM) terminal 2G (vehicle wiring harness side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness which is shorted to ground, then 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 AUTO-LIGHT SENSOR/RAIN SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY
• Verify that the auto-light sensor/rain sensor and front body control module (FBCM) connectors are disconnected.
• Connect the negative battery cable.
• Switch the ignition ON (engine off or on).
• Measure the voltage at front body control module (FBCM) terminal 2G (vehicle wiring harness side).
• Is the voltage 0 V?
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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 wiring harness which is shorted to power supply, then go to Step 8.
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6
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INSPECT AUTO-LIGHT SENSOR/RAIN SENSOR CIRCUIT FOR OPEN CIRCUIT
• Verify that the auto-light sensor/rain sensor and front body control module (FBCM) connectors are disconnected.
• Switch the ignition to off.
• Disconnect the negative battery cable.
• Inspect the wiring harness for continuity between auto-light sensor/rain sensor terminal A (vehicle wiring harness side) and front body control module (FBCM) terminal 2G (vehicle 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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Repair or replace the wiring harness which has an open circuit, then go to Step 8.
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7
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PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS AUTO-LIGHT SENSOR/RAIN SENSOR
• Reconnect all the disconnected connectors.
• Reconnect the disconnected negative battery cable.
• Clear front body control module (FBCM) DTCs using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Perform the front body control module (FBCM) DTC inspection using the M-MDS.
• Is the DTC U0231:68 displayed?
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Yes
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Replace the auto-light sensor/rain sensor, then go to the next step.
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No
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Go to Step 9.
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8
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Reconnect all the disconnected connectors.
• Reconnect the disconnected negative battery cable.
• Clear front body control module (FBCM) DTCs using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Perform the front body control module (FBCM) DTC inspection using the M-MDS.
• Is the DTC U0231:68 displayed?
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Yes
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replace the front body control module (FBCM), then go to the next step.
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No
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Go to the next step.
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9
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair 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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