DTC B109F:86 [BCM]


id0902f5412700


Description

•  Signal error from intruder sensor

Detection Condition

•  Signal error from intruder sensor.

Possible Causes

•  Intruder sensor connector or terminals malfunction
•  BCM connector or terminals malfunction
•  Short to ground in wiring harness between intruder sensor terminal C and BCM terminal 6F
•  Short to power supply in wiring harness between intruder sensor terminal C and BCM terminal 6F
•  Intruder sensor malfunction
•  BCM malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1
PERFORM DTC INSPECTION
•  Clear the DTCs using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the DTC B109F:86 present?
Yes
Go to the next step.
No
DTC troubleshooting completed.
2
INSPECT INTRUDER SENSOR CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the intruder sensor connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
3
INSPECT BCM CONNECTOR CONDITION
•  Disconnect the BCM connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
4
INSPECT INTRUDER SENSOR CIRCUIT FOR SHORT TO GROUND
•  Intruder sensor and BCM connectors are disconnected.
•  Inspect for continuity between intruder sensor terminal C (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
No
Go to the next step.
5
INSPECT INTRUDER SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY
•  Intruder sensor and BCM connectors are disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the intruder sensor terminal C (wiring harness-side).
•  Can the voltage be measured?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
No
Go to the next step.
6
INSPECT INTRUDER SENSOR
•  Inspect the intruder sensor.
•  Is there any malfunction?
Yes
Replace the intruder sensor, then go to the next step.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTCs using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the DTC B109F:86 present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the BCM.
Go to the next step.
No
Go to the next step.
8
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.