DTC U0447:86 [REAR BODY CONTROL MODULE (RBCM)]

id0902p4015300

Description

Communication error between front body control module (FBCM) and instrument cluster

Detection condition

•  Rear body control module (RBCM) receives the error signals from the instrument cluster for 10 times continuously with the ignition switched ON (engine off or on).

Fail-safe function

Not applicable

Possible cause

•  DTCs are stored in the instrument cluster.

•  Instrument cluster malfunction

•  Rear body control module (RBCM) malfunction

System wiring diagram

Not applicable

Description	Communication error between front body control module (FBCM) and instrument cluster
Detection condition	• Rear body control module (RBCM) receives the error signals from the instrument cluster for 10 times continuously with the ignition switched ON (engine off or on).
Fail-safe function	Not applicable
Possible cause	• DTCs are stored in the instrument cluster. • Instrument cluster malfunction • Rear body control module (RBCM) malfunction
System wiring diagram	Not applicable

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)].) • 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	Go to the next step.
1		No	Go to Step 5.
2	VERIFY INSTRUMENT CLUSTER DTCs • Retrieve the instrument cluster DTCs using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [INSTRUMENT CLUSTER].)
2		No	Go to the next step.
3	PERFORM DTC INSPECTION AND VERIFY INSTRUMENT CLUSTER MALFUNCTION • 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 instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
3		No	Go to Step 5.
4	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)].) • 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.
4		No	Go to the next step.
5	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)].)
5		No	DTC troubleshooting completed.