DTC B10A6:64 [BCM]
id0902f5068100
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Description |
Light switch error signal received |
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Detection condition
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• BCM receives error signals from the start stop unit for 5 s or more with the ignition switched ON (engine off or on).
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Fail-safe
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Exterior lighting system
• Turn the TNS and headlights LO on, and turn off other exterior light controls.
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Possible cause
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• Start stop unit malfunction
• Light switch malfunction
• BCM malfunction
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System wiring diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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VERIFY BCM DTCs AGAIN
• Clear the DTC for the BCM using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the BCM DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
• 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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VERIFY START STOP UNIT DTCs
• Retrieve the start stop unit DTCs using the M-MDS.
• 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.
(See DTC TABLE [START STOP UNIT].)
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No
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Go to the next step.
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3
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INSPECT LIGHT SWITCH
• Inspect the light switch.
• Is the light switch normal?
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Yes
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Replace the start stop unit, then go to the next step.
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No
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Replace the light switch, then go to the next step.
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4
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Clear the DTC for the BCM using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the BCM DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
• Is the same DTC displayed?
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Yes
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Replace the BCM, then 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.
(See DTC TABLE [BCM].)
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No
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DTC troubleshooting completed.
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