BRIGHTNESS LEVEL OF RVM WARNING INDICATOR LIGHTS IS TOO HIGH OR LOW [REAR VEHICLE MONITORING SYSTEM]

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Note

•  If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [REAR VEHICLE MONITORING SYSTEM] malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [REAR VEHICLE MONITORING SYSTEM].)

Description	Brightness level of RVM warning indicator lights is too high or low
	•  The brightness level of the RVM warning indicator light is low in the daytime (headlights off) (correct level at night). •  The brightness level of the RVM warning indicator light is high at night (headlights on) (correct level in the daytime).
Possible Causes	Note •  The detection performance of the rear vehicle monitoring control module has limitations and the Rear vehicle monitoring system may not operate normally. For the detection performance limitations, refer to the [REAR VEHICLE MONITORING CONTROL MODULE] in the technical guide. •  The rear view monitoring control module (LH) cannot receive the TNS switch signal. ―  TNS switch (light switch) malfunction (stuck) ―  Instrument cluster malfunction ―  Rear vehicle monitoring control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	DETERMINE IF MALFUNCTION CAUSE IS RVM WARNING INDICATOR LIGHT ILLUMINATION CIRCUIT •  Monitor the following rear vehicle monitoring system PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION [REAR VEHICLE MONITORING SYSTEM].) ―  OP_BRT_R ―  OP_BRT_L •  Turn the headlight switch (TNS switch) on/off. Note •  While the headlights turned on, the PID monitoring value increases (brighter). •  Does the PID display value change according to the operation of the headlight switch?	Yes	Replace the rear vehicle monitoring control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Go to the next step.
2	INSPECT LIGHT SWITCH •  Inspect the light switch. (See LIGHT SWITCH INSPECTION.) •  Is the light switch normal?	Yes	Go to the next step.
		No	Replace the light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION.)
3	DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER OR REAR VEHICLE MONITORING CONTROL MODULE (LH) •  Display the instrument cluster PID I_ILLUMI_M item using the M-MDS. (See PID/DATA MONITOR INSPECTION [INSTRUMENT CLUSTER].) •  Turn the headlight switch (TNS switch) on/off. •  Does the PID/data monitor display switch normally?	Yes	Replace the rear vehicle monitoring control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)