No.7 RVM WARNING INDICATOR LIGHT DOES NOT FLASH WHILE UNDER FLASHING CONDITIONS (TURN SIGNAL IS BEING OPERATED) [REAR VEHICLE MONITORING SYSTEM]SM2446179
No.7 RVM WARNING INDICATOR LIGHT DOES NOT FLASH WHILE UNDER FLASHING CONDITIONS (TURN SIGNAL IS BEING OPERATED) [REAR VEHICLE MONITORING SYSTEM]

id0903z7994600

7

RVM warning indicator light does not flash while under flashing conditions (turn signal is being operated)
DESCRIPTION
• RVM warning indicator light does not flash/remains illuminated despite satisfying conditions to flash RVM warning indicator light ( vehicle speed above 60 km/h {37 mph}, turn signals on, and vehicle in detection area)
• RVM warning indicator light does not flash or remains illuminated, but turn signals are on
Note
• This malfunction symptom is considered the same symptom as “No.5 RVM warning indicator light does not illuminate while under illumination conditions”.
POSSIBLE CAUSES
• Rear vehicle monitoring control modules false-detect a vehicle as being outside blind-spot area when it is actually inside of it, or cannot determine that no vehicle is entering blind-spot area.
― Rear vehicle monitoring control module radar is not emitted inside 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
― Rear vehicle monitoring control module radar does not receive echo-back correctly
• Rear vehicle monitoring control module malfunction
• 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 vehicle speed correctly (false-detection of vehicle speed as being within 55 km/h {34 mph} constantly)
― Communication error between PCM and rear vehicle monitoring control module (RH)
― ABS wheel-speed sensor malfunction
• Rear vehicle monitoring control modules false-detect vehicle is traveling on gentle curve (small curvature)
― Yaw rate signal malfunction
• Communication error between DSC HU/CM and rear vehicle monitoring control module (RH)
• Communication error between rear vehicle monitoring control modules (RH and LH)
• Yaw rate sensor (combined sensor) malfunction
• RVM warning indicator light illumination related malfunction
― RVM warning indicator light malfunction
― Open or short circuit in wiring harness between RVM warning indicator light and rear vehicle monitoring control module (LH)
― Rear vehicle monitoring control module (LH) malfunction (warning light illumination circuit disabled)
― Communication error between rear vehicle monitoring control modules (RH and LH) (Rear vehicle monitoring control module (LH) does not receive illumination request from rear vehicle monitoring control module (RH))
• Rear vehicle monitoring control modules do not detect turn signal operation
― Communication error between BCM and rear vehicle monitoring control module (RH)
― Turn signal switch (combination switch) malfunction (open circuit)
― Open circuit in wiring harness between turn signal switch (combination switch) and BCM
― Communication error between rear vehicle monitoring control modules (RH and LH) (turn signal is not transmitted to LH side)


Diagnostic Procedure

Step

Inspection

Action
1
VERIFY MALFUNCTION SYMPTOM
• Does the RVM warning indicator light illuminate when the illumination conditions are satisfied?
Yes
Go to the next step.
No
Go to the symptom troubleshooting procedure,“No.5 RVM warning indicator light does not illuminate while under illumination conditions”.
(See No.5 RVM WARNING INDICATOR LIGHT DOES NOT ILLUMINATE UNDER ILLUMINATION CONDITIONS [REAR VEHICLE MONITORING SYSTEM].)
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.
• Turn signal switch (combination switch) (See COMBINATION SWITCH REMOVAL/INSTALLATION.)
• Wiring harness between turn signal switch (combination switch) terminal A (L.H.D.)/M (R.H.D.) and BCM terminal 3R
• Wiring harness between turn signal switch (combination switch) terminal E (L.H.D.)/Q (R.H.D.) and BCM terminal 3P
• Wiring harness between turn signal switch (combination switch) terminal I and ground
If a malfunction is not detected, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)