DTC B2177 [BCM]
id0902f5832500
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DTC B2177 |
Intruder sensor circuit failure |
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DETECTION CONDITION
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Intruder sensor malfunction or circuit malfunction
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POSSIBLE CAUSE
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• Open circuit in wiring harness between BCM terminal 5P and intruder sensor terminal C
• Short to power supply in wiring harness between BCM terminal 5P and intruder sensor terminal C
• Short to GND in wiring harness between BCM terminal 5P and intruder sensor terminal C
• Intruder sensor 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 INTRUDER SENSOR CONNECTOR
• Turn the ignition switch off.
• Disconnect the intruder sensor connector.
• Inspect the intruder sensor 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 6.
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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 6.
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No
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Go to the next step.
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3
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INSPECT INTRUDER SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between BCM terminal 5P (wiring harness-side) and intruder sensor terminal C (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 for a possible open circuit, then go to Step 6.
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4
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INSPECT INTRUDER SENSOR SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between BCM terminal 5P (wiring harness-side) and body GND.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to GND, then go to Step 6.
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No
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Go to the next step.
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5
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INSPECT INTRUDER SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between BCM terminal 5P (wiring harness-side) and body GND.
• Is the voltage B+?
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Yes
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Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
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No
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Replace the intruder sensor, then go to the next step.
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6
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VERIFY TROUBLESHOOTING COMPLETED
• 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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Troubleshooting completed.
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