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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.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• 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 5.
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2
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INSPECT FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION
• Switch the ignition off.
• Disconnect the negative battery cable.
• 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 4.
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3
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VERIFY FRONT BODY CONTROL MODULE (FBCM) POWER SUPPLY VOLTAGE
• Always reconnect all disconnected connectors.
• Reconnect the negative battery cable.
• Display the PID VPWR_B using the M-MDS.
• Is the voltage B+?
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Yes
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Go to the next step.
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No
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Inspect the ROOM 15A fuse, HAZARD 25 A fuse and MAIN 200 A fuse.
• If the fuse is blown:
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― Refer to the wiring diagram and verify whether or not there is a common connector between the following:
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• MAIN 200 A fuse—Front body control module (FBCM) terminal 2A
• MAIN 200 A fuse—Front body control module (FBCM) terminal 1A
• MAIN 200 A fuse—Front body control module (FBCM) terminal 1B
• MAIN 200 A fuse—Front body control module (FBCM) terminal 3K
• MAIN 200 A fuse—Front body control module (FBCM) terminal 3L
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:
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― Replace the fuse.
• If the fuse is normal:
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― Refer to the wiring diagram and verify whether or not there is a common connector between the following:
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• Battery positive terminal—Front body control module (FBCM) terminal 2A
• Battery positive terminal—Front body control module (FBCM) terminal 1A
• Battery positive terminal—Front body control module (FBCM) terminal 1B
• Battery positive terminal—Front body control module (FBCM) terminal 3K
• Battery positive terminal—Front body control module (FBCM) terminal 3L
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 an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
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• Repair or replace the wiring harness which has an open circuit.
Go to the next step.
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4
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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.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• 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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5
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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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