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

id0902p4015300

System malfunction location

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

Detection condition

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

Fail-safe

—

Possible cause

•  DTCs are stored in the instrument cluster.

•  Rear body control module (RBCM) malfunction

System wiring diagram

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System malfunction location	Communication error between front body control module (FBCM) and instrument cluster
Detection condition	• The rear body control module (RBCM) receives error signals from the instrument cluster for 10 s or more continuously with the ignition switched ON (engine off or on).
Fail-safe	—
Possible cause	• DTCs are stored in the instrument cluster. • 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)].) • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the DTC U0447:86 displayed?	Yes	Go to the next step.
1		No	Go to Step 4.
2	VERIFY INSTRUMENT CLUSTER DTCs • Perform the DTC inspection for the instrument cluster using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is the DTC displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [INSTRUMENT CLUSTER].)
2		No	Go to the next step.
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)].) • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the DTC U0447:86 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.)
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.