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

id0903z7994300

4	RVM warning indicator light illuminates while not under illumination conditions
DESCRIPTION	•  RVM warning indicator light illuminates although illumination conditions (vehicle speed above 60 km/h {37 mph}, turn signals off, and vehicle in detection area) are not satisfied.
POSSIBLE CAUSES	•  Rear vehicle monitoring control modules false-detect that a vehicle is 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) •  Yaw rate signal error (communication error between DSC HU/CM and rear vehicle monitoring control module (RH), communication error between rear vehicle monitoring control modules (RH and LH), or combined sensor 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 above 60 km/h {37 mph} constantly). ―  Communication error between PCM and rear vehicle monitoring control module (RH) ―  ABS wheel-speed sensor malfunction •  RVM warning indicator light illumination circuit disabled ―  Rear vehicle monitoring control module (LH) internal malfunction (RVM warning indicator light illumination circuit disabled) ―  Rear vehicle monitoring control module (RH) malfunction (outputs incorrect illumination request)

Diagnostic Procedure

Warning

•  When performing a road test, always verify the safety of the surrounding area before performing the test.

•  To assure safety, perform a road test using two people when the vehicle is being driven. (One drives the vehicle and the other operates the M-MDS.)

•  Do not perform a road test at a speed which exceeds the legal speed limit.

Step	Inspection		Action
1	VERIFY DTCs •  Retrieve DTCs from the rear vehicle monitoring system, PCM, DSC, and instrument cluster using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) (See ON-BOARD DIAGNOSTIC TEST [ZY, Z6].) (See ON-BOARD DIAGNOSTIC TEST [LF, L5].) (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO4 emission level)].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO5 emission level)].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) •  Are any DTCs displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].) (See DTC TABLE [INSTRUMENT CLUSTER].) (See DTC TABLE [ZY, Z6].) (See DTC TABLE [LF, L5].) (See DTC TABLE [MZR 2.0 DISI i-stop].) (See DTC TABLE [L3 Turbo].) (See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].) (See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].) (See DTC TABLE [MZR-CD 2.2].) (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
		No	Go to the next step.
2	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].) ―  VSPD ―  YAW_RATE •  Are the monitoring values normal?	Yes	Go to Step 6.
		No	•  If VSPD monitor value is not normal, go to the next step. •  If the YAW_RATE monitor value is not normal: ―  Go to Step 4. (Vehicles with combined sensor) ―  Go to Step 5. (Vehicles without combined sensor)
3	INSPECT VEHICLE SPEED SIGNAL •  Monitor the PID VSS for the PCM using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [ZY, Z6].) (See ON-BOARD DIAGNOSTIC TEST [LF, L5].) (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO4 emission level)].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO5 emission level)].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) •  Are the monitoring values normal?	Yes	Replace the rear vehicle monitoring control module (RH).
		No	Inspect the ABS wheel speed sensor related parts. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION.)
4*	INSPECT YAW RATE SENSOR •  Inspect the yaw rate sensor (combined sensor). (See COMBINED SENSOR INSPECTION.) •  Is the yaw rate sensor normal?	Yes	Replace the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the combined sensor. (See COMBINED SENSOR REMOVAL/INSTALLATION.)
5	INSPECT YAW RATE SENSOR •  Inspect the DTC for the SAS control module ON-BOARD DIAGNOSTIC SYSTEM. (See DTC INSPECTION [TYPE B].) •  Have DTCs C1280 been recorded in memory?	Yes	Inspect the DTC C1280 for the SAS control module. (See DTC C1280, C1282, C2770 [TYPE B].)
		No	Replace the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
6	VERIFY REAR BUMPER CONDITION •  Inspect the rear bumper at the rear vehicle monitoring control module installation area for the following: ―  Installation condition ―  Application of stickers (including transparent types) ―  Excessive soiling ―  Repairs using putty •  Is the rear bumper condition normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning part, or replace the rear bumper. (See REAR BUMPER REMOVAL/INSTALLATION.)
7	VERIFY INSTALLATION CONDITION OF REAR VEHICLE MONITORING CONTROL MODULES •  Remove the rear bumper. (See REAR BUMPER REMOVAL/INSTALLATION.) •  Inspect the installation condition of the rear vehicle monitoring control modules for the following: ―  Looseness ―  Damage or deformity to the bracket ―  Distortion at vehicle installation surface •  Is the rear vehicle monitoring control modules installation condition normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning part.
8	VERIFY IF MALFUNCTION CAUSE IS AFTER-MARKET ELECTRONIC DEVICE INSTALLATION •  Disconnect the non-genuine, after-market electronic device connectors. •  Verify that the malfunction symptom recurs as stated by the customer. •  Does the malfunction recur?	Yes	Go to the next step.
		No	Explain to the customer that the malfunction occurred due to after-market electronic device installation.
9	VERIFY IF MALFUNCTION CAUSE IS RVM WARNING INDICATOR LIGHT ILLUMINATION CIRCUIT RELATED •  Switch the ignition to ON. •  Turn on and off the RVM warning indicator light using the following rear vehicle monitoring system active commands by using the M-MDS: (See ACTIVE COMMAND MODES INSPECTION [REAR VEHICLE MONITORING SYSTEM].) ―  WRN_IND_R ―  WRN_IND_L •  Does RVM warning indicator light turn on and off according to active command?	Yes	Go to Step 11.
		No	Go to the next step.
10	DETERMINE IF MALFUNCTION CAUSE IS REAR VEHICLE MONITORING CONTROL MODULES OR RVM WARNING INDICATOR LIGHTS •  Inspect the following: RVM warning indicator light (RH) related: ―  Wiring harness between RVM warning indicator light (RH) terminal B and rear vehicle monitoring control module (LH) terminal J ―  Wiring harness between RVM warning indicator light (RH) terminal D and rear vehicle monitoring control module (LH) terminal I RVM warning indicator light (LH) related: ―  Wiring harness between RVM warning indicator light (LH) terminal B and rear vehicle monitoring control module (LH) terminal A ―  Wiring harness between RVM warning indicator light (LH) terminal D and rear vehicle monitoring control module (LH) terminal E •  Is any malfunction verified?	Yes	Repair or replace the malfunctioning part.
		No	•  Replace the rear vehicle monitoring control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
11	INSPECT REAR VEHICLE MONITORING CONTROL MODULES •  Inspect the malfunctioning rear vehicle monitoring control module. •  Is the rear vehicle monitoring control module normal?	Yes	Temporary malfunction with the radar echo-back. If the same symptom recurs repeatedly, replace the rear vehicle monitoring control module. (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)