DTC B1566 [BCM]
id0902f5838200
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DTC B1566 |
Door ajar circuit short to ground |
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DETECTION CONDITION
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Short to GND in wiring harness between BCM and door switches
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POSSIBLE CAUSE
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• Short to GND in wiring harness between BCM terminal 5Y and rear door switch (LH) terminal A
• Short to GND in wiring harness between BCM terminal 5Z and rear door switch (RH) terminal A
• Rear door switch malfunction
• BCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT REAR DOOR SWITCH CONNECTOR
• Turn the ignition switch to the LOCK position.
• Disconnect the rear door switch connector.
• Inspect the rear door switch connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 5.
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No
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Go to the next step.
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2
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INSPECT BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the BCM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 5.
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No
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Go to the next step.
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3
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INSPECT REAR DOOR SWITCH
• Inspect the rear door switch.
(See DOOR SWITCH INSPECTION.)
• Is there any malfunction?
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Yes
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Replace the rear door switch, then go to Step 5.
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No
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Go to the next step.
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4
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INSPECT SLIDING DOOR SWITCH SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between rear door switch terminal A (wiring harness-side) body GND.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible open circuit, then go o 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 TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the BCM memory using the M-MDS.
• Turn the ignition switch to LOCK position then ON position.
• Is the same DTC present?
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Yes
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Replace the BCM.
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No
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DTC troubleshooting completed.
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