DTC U0423:68 [REAR VEHICLE MONITORING SYSTEM]

id0902z2888900

Description

Error signal received from instrument cluster

Detection condition

•  Rear vehicle monitoring control module (LH) receives the error signal from the instrument cluster for 2 s or more.

Fail-safe function

•  Inhibits the rear vehicle monitoring system.

Possible cause

•  DTCs are stored in the instrument cluster.

•  Instrument cluster malfunction

•  Rear vehicle monitoring control module (LH) malfunction

System wiring diagram

Not applicable

Description	Error signal received from instrument cluster
Detection condition	• Rear vehicle monitoring control module (LH) receives the error signal from the instrument cluster for 2 s or more.
Fail-safe function	• Inhibits the rear vehicle monitoring system.
Possible cause	• DTCs are stored in the instrument cluster. • Instrument cluster malfunction • Rear vehicle monitoring control module (LH) malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	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].)
1		No	Go to the next step.
2	INSPECT INSTRUMENT CLUSTER • Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.) • Is the instrument cluster normal?	Yes	Go to the next step.
2		No	Replace the instrument cluster, then go to Step 4. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
3	PERFORM DTC INSPECTION AND VERIFY INSTRUMENT CLUSTER MALFUNCTION • Clear the DTC for the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Switch the ignition ON (engine off or on) and wait for 3.5 s or more. • Retrieve the rear vehicle monitoring control module DTCs using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • 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 vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Switch the ignition ON (engine off or on) and wait for 3.5 s or more. • Retrieve the rear vehicle monitoring control module DTCs using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear vehicle monitoring control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE 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 VEHICLE MONITORING SYSTEM].)
5		No	DTC troubleshooting completed.