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

id0902p4090300

System malfunction location

Collision detection

Detection condition

•  RBCM received collision signal and door is unlocked with ignition switched ON

Fail-safe

•  Do not lock door until ignition is switched OFF

Possible cause

•  Vehicle collision

•  Rear body control module (RBCM) malfunction

System wiring diagram

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System malfunction location	Collision detection
Detection condition	• RBCM received collision signal and door is unlocked with ignition switched ON
Fail-safe	• Do not lock door until ignition is switched OFF
Possible cause	• Vehicle collision • Rear body control module (RBCM) malfunction
System wiring diagram	—

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY VEHICLE COLLISION • Explain to the customer that the vehicle was hit. • Has the vehicle been hit?	Yes	Explain to the customer that the door unlocked due to a vehicle collision and this DTC has been detected.
1		No	Go to the next step.
2	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Reconnect the disconnected negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Clear rear body control module (RBCM) DTCs using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • 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 B1207:09 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear body control module (RBCM), then go to the next step. (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
2		No	Go to the next step.
3	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)].)
3		No	DTC troubleshooting completed.