DTC B143A:00 [REAR BODY CONTROL MODULE (RBCM)]

id0902p4090300

Description

Collision detection unlock function operation

Detection condition

•  Rear body control module (RBCM) operates the collision detection unlock function.

Fail-safe

Not applicable

Possible cause

Caution

•  The rear body control module (RBCM) operates the collision detection unlock function in the event of a collision to enhance rescue operation from outside the vehicle. The rear body control module (RBCM) operates the collision detection unlock function and outputs this DTC simultaneously. Explain to the customer that this may not indicate a malfunction even if this DTC is output.

•  Collision detection unlock function operated due to vehicle collision.

•  Rear body control module (RBCM) internal malfunction

System wiring diagram

Not applicable

Description	Collision detection unlock function operation
Detection condition	• Rear body control module (RBCM) operates the collision detection unlock function.
Fail-safe	Not applicable
Possible cause	Caution • The rear body control module (RBCM) operates the collision detection unlock function in the event of a collision to enhance rescue operation from outside the vehicle. The rear body control module (RBCM) operates the collision detection unlock function and outputs this DTC simultaneously. Explain to the customer that this may not indicate a malfunction even if this DTC is output. • Collision detection unlock function operated due to vehicle collision. • Rear body control module (RBCM) internal malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY IF COLLISION DETECTION UNLOCK FUNCTION OPERATED • Lock all the doors by operating the driver’s door lock knob. • Clear the DTC for the rear body control module (RBCM) using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • 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 rear body control module (RBCM), then go to the next step. (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
1		No	Go to the next step.
2	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)].)
2		No	DTC troubleshooting completed.