DTC B10A5:86 [REAR BODY CONTROL MODULE (RBCM)]

id0902p4013500

Description

Theft-deterrent siren signal error

Detection condition

•  Rear body control module (RBCM) receives the error signal from theft-deterrent siren for 1.5 s or more.

Fail-safe function

Not applicable

Possible cause

•  Malfunction in LIN bus communication line

―  Rear body control module (RBCM) terminal 3A—Theft-deterrent siren terminal A

•  Theft-deterrent siren malfunction

•  Rear body control module (RBCM) malfunction

Description	Theft-deterrent siren signal error
Detection condition	• Rear body control module (RBCM) receives the error signal from theft-deterrent siren for 1.5 s or more.
Fail-safe function	Not applicable
Possible cause	• Malfunction in LIN bus communication line ― Rear body control module (RBCM) terminal 3A—Theft-deterrent siren terminal A • Theft-deterrent siren malfunction • Rear body control module (RBCM) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY REAR BODY CONTROL MODULE (RBCM) DTCs AGAIN • Clear the DTC for the rear body control module (RBCM) 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. • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	A malfunction in LIN bus communication line can be considered. • Refer to the wiring diagram and verify whether or not there is a common connector between rear body control module (RBCM) terminal 3A and theft-deterrent siren terminal A. If there is a common connector: ― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a malfunction. ― Repair or replace the malfunctioning part. If there is no common connector: ― Repair or replace the wiring harness. Go to the next step.
1		No	Go to Step 4.
2	PERFORM DTC INSPECTION AND VERIFY THEFT-DETERRENT SIREN MALFUNCTION • Clear the DTC for the rear body control module (RBCM) 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. • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	Replace the theft-deterrent siren, then go to the next step. (See THEFT-DETERRENT SIREN REMOVAL/INSTALLATION.)
2		No	Go to Step 4.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the rear body control module (RBCM) 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. • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.) Go to the next step.
3		No	Go to the next step.
4	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].)
4		No	DTC troubleshooting completed.