No.6 RVM WARNING INDICATOR LIGHT FLASHES WHILE NOT UNDER FLASHING CONDITIONS [REAR VEHICLE MONITORING SYSTEM]

id0903z7827300

Description

• RVM warning indicator light flashes although the RVM warning indicator light illumination conditions (vehicle speed above 60 km/h {37 mph}, turn signals on, and vehicle in detection area) are not satisfied.

• RVM warning indicator light flashes but turn signals are not operated.

Note

• This malfunction symptom is basically the same as symptom “No.4 RVM warning indicator light illuminates while not under illumination conditions”.

Possible Causes

• Rear vehicle monitoring control modules false-detect a vehicle as being inside detection area when it is actually outside of it, or cannot determine that a vehicle is entering blind-spot area.

― Rear vehicle monitoring control module radar is not emitted inside of detection area (deviates from blind-spot area or adjacent lanes)

• Damage, deformity or looseness to rear vehicle monitoring bracket or vehicle frame (including moderate impacts)

• Incorrect installation of rear bumper, soiling to radar emitting/receiving area, application of stickers (including transparent types), repairs using putty application

― Effect of non-genuine, after-market electronic device installation

Note

• The radar sensor cannot receive echo-back correctly if there is a thick moisture film (such as condensation) or excessive soiling covering the rear bumper radar emitting/receiving areas.

• Non-genuine rear bumper or paint, or installation of after-market parts may negatively affect radar echo-back ability.

• Rear vehicle monitoring control modules do not detect the vehicle speed correctly (false detection of vehicle speed as being above 60 km/h {37 mph} constantly).

― Communication error between PCM and rear vehicle monitoring control module (RH)

― Rear vehicle monitoring control module (RH) malfunction

― ABS wheel-speed sensor malfunction

• Rear vehicle monitoring control modules false-detect that turn signals are on.

― Communication error between BCM and rear vehicle monitoring control module (RH)

― BCM malfunction

― Rear vehicle monitoring control module (RH) malfunction

― Short circuit to ground in wiring harness between light switch and BCM

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY MALFUNCTION SYMPTOM

•  Do the RVM warning indicator light and RVM warning light (amber) illuminate when the illumination conditions are not satisfied?

Yes

Go to the symptom troubleshooting procedure, “No.4 RVM warning indicator light illuminates while not under illumination conditions”.

(See No.4 RVM WARNING INDICATOR LIGHT ILLUMINATES WHILE NOT UNDER ILLUMINATION CONDITIONS [REAR VEHICLE MONITORING SYSTEM].)

No

Go to the next step.

2

VERIFY DTCs

•  Retrieve DTCs from the rear vehicle monitoring system and BCM using the M-MDS.
(See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].)

(See DTC INSPECTION [BCM].)

•  Are any DTCs displayed?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)

(See DTC TABLE [BCM].)

No

Go to the next step.

3

DETERMINE IF MALFUNCTION CAUSE IS INPUT SIGNAL OR REAR VEHICLE MONITORING CONTROL MODULE RELATED

•  Monitor the following rear vehicle monitoring system PIDs using the M-MDS:
(See PID/DATA MONITOR INSPECTION [REAR VEHICLE MONITORING SYSTEM].)

―  TURN_SW_R

―  TURN_SW_L

•  Does the monitoring value turn on and off according to the turn signal switch operation?

Yes

Replace the rear vehicle monitoring control module (RH).

(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to the next step.

4

INSPECT TURN SIGNAL SWITCH SIGNAL

•  Monitor the following BCM PIDs using the M-MDS:
(See PID/DATA MONITOR INSPECTION [BCM].)

―  TURN_SW_R

―  TURN_SW_L

•  Does the monitoring value turn on and off according to the turn signal switch operation?

Yes

Replace the rear vehicle monitoring control module (RH).

(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)

No

Inspect the following. If a malfunction is detected, repair or replace the malfunctioning part.

•  Light switch
(See LIGHT SWITCH INSPECTION.)

•  Wiring harness between light switch (LH) terminal E and BCM terminal 3E*¹

•  Wiring harness between light switch (RH) terminal G and BCM terminal 3H*¹

•  Wiring harness between light switch terminal I and ground*¹

•  Wiring harness between light switch (LH) terminal I and BCM terminal 3E*²

•  Wiring harness between light switch (RH) terminal G and BCM terminal 3H*²

•  Wiring harness between light switch terminal E and ground*²

If a malfunction is not detected, replace the BCM.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Step	Inspection	Action
1	VERIFY MALFUNCTION SYMPTOM • Do the RVM warning indicator light and RVM warning light (amber) illuminate when the illumination conditions are not satisfied?	Yes	Go to the symptom troubleshooting procedure, “No.4 RVM warning indicator light illuminates while not under illumination conditions”. (See No.4 RVM WARNING INDICATOR LIGHT ILLUMINATES WHILE NOT UNDER ILLUMINATION CONDITIONS [REAR VEHICLE MONITORING SYSTEM].)
No	Go to the next step.
2	VERIFY DTCs • Retrieve DTCs from the rear vehicle monitoring system and BCM using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) (See DTC INSPECTION [BCM].) • Are any DTCs displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].) (See DTC TABLE [BCM].)
No	Go to the next step.
3	DETERMINE IF MALFUNCTION CAUSE IS INPUT SIGNAL OR REAR VEHICLE MONITORING CONTROL MODULE RELATED • Monitor the following rear vehicle monitoring system PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION [REAR VEHICLE MONITORING SYSTEM].) ― TURN_SW_R ― TURN_SW_L • Does the monitoring value turn on and off according to the turn signal switch operation?	Yes	Replace the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
No	Go to the next step.
4	INSPECT TURN SIGNAL SWITCH SIGNAL • Monitor the following BCM PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION [BCM].) ― TURN_SW_R ― TURN_SW_L • Does the monitoring value turn on and off according to the turn signal switch operation?	Yes	Replace the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
No	Inspect the following. If a malfunction is detected, repair or replace the malfunctioning part. • Light switch (See LIGHT SWITCH INSPECTION.) • Wiring harness between light switch (LH) terminal E and BCM terminal 3E¹ • Wiring harness between light switch (RH) terminal G and BCM terminal 3H¹ • Wiring harness between light switch terminal I and ground¹ • Wiring harness between light switch (LH) terminal I and BCM terminal 3E² • Wiring harness between light switch (RH) terminal G and BCM terminal 3H² • Wiring harness between light switch terminal E and ground² If a malfunction is not detected, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

*1 :Vehicles with light switch on left side

*2 :Vehicles with light switch on right side