DTC B109F:86 [REAR BODY CONTROL MODULE (RBCM)]

id0902p4013200

System malfunction location

Intruder sensor signal error

Detection condition

•  Rear body control module (RBCM) receives error signal from intruder sensor for 1.5 s or more.

Fail-safe

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Possible cause

•  Intruder sensor malfunction

•  Rear body control module (RBCM) malfunction

System wiring diagram

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System malfunction location	Intruder sensor signal error
Detection condition	• Rear body control module (RBCM) receives error signal from intruder sensor for 1.5 s or more.
Fail-safe	—
Possible cause	• Intruder sensor malfunction • Rear body control module (RBCM) malfunction
System wiring diagram	—

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY REAR BODY CONTROL MODULE (RBCM) DTCs AGAIN • Clear rear body control module (RBCM) DTCs using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Switch the ignition ON (engine on) and wait for 3 s or more. • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is DTC B109F:86 displayed?	Yes	A malfunction in LIN bus communication line can be considered. • Repair or replace the wiring harness between the rear body control module (RBCM) and the intruder sensor, then go to the next step.
1		No	Go to Step 4.
2	PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS INTRUDER SENSOR • Clear rear body control module (RBCM) DTCs using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Switch the ignition ON (engine on) and wait for 3 s or more. • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is DTC B10A5:86 displayed?	Yes	Replace the intruder sensor, then go to the next step. (See INTRUDER SENSOR REMOVAL/INSTALLATION.)
2		No	Go to Step 4.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear rear body control module (RBCM) DTCs using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Switch the ignition ON (engine on) and wait for 3 s or more. • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is DTC B109F:86 displayed?	Yes	Replace the rear body control module (RBCM), then go to the next step. (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
3		No	Go to the next step.
4	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].)
4		No	DTC troubleshooting completed.