MRCC/SBS/DRSS MIS-OPERATION [VEHICLE CONTROL MODULE (V/C-MODULE)]

id0103g5010500


Description

•  The system operates on a vehicle traveling in the adjacent drive lane.
•  System operates on objects not within the millimeter wave emission range of the radar sensors.
•  MRCC unintentional vehicle speed decrease
•  MRCC unintentional vehicle speed increase

Possible malfunction

•  Radar sensor and radiator grille ornament soiling, scratches, or loss
•  Radar axis deviation due to impact around radar sensor
•  Radar axis deviation due to poor radar sensor installation
•  Aiming adjustment not implemented
•  Poor radar sensor
•  DSC HU/CM malfunction
•  SAS control module malfunction
•  Vehicle control module malfunction
•  Explain that the system may temporarily mis-operate due to the following causes.
―  Effects of traffic conditions
•  Driving on a continuously curving road, entrance to and exit of a curve, or narrow lane roads due to road construction or lane closures
•  Driving under erratic conditions in which there is an accident or vehicle breakdown within position of vehicle lane lines
―  Effects of driving conditions
•  Vehicle posture largely changes due to load condition
―  Affects from maintenance condition of vehicle
•  Dirt on radiator grille ornament, modifications, application of stickers (including transparent types), scratches, or damage
―  Effects of detected objects (driving under condition in which the following conditions recur repeatedly)
•  There is roadside structure at entrance to a curve
•  There is on-coming vehicle when making a right turn or cornering
•  Crossing narrow iron bridge
•  Passing through low or narrow gate
•  There is metal object, height difference, or projection on road surface
•  Approaching vehicle ahead rapidly
•  Passing through Electronic toll gate

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY INDICATION IN INSTRUMENT CLUSTER LCD
•  Is the message indicating “SBS, MRCC, DRCC Radar blocked” displayed in the LCD in the instrument cluster?
Yes
Go to the next step.
No
Go to Step 3.
2
VERIFY AREA AROUND RADAR SENSOR
•  Visually inspect the surface of the radar sensor or front bumper.
•  Any of the following conditions:
―  Dirt is adhering to radar sensor surface
―  Dirt is adhering to front bumper surface
―  Foreign material (reflective object) is adhering to radar sensor
―  Foreign material (reflective object) is adhering to front bumper
Yes
•  Clean and remove foreign matter from the radar sensors and surface of the front bumper (reflecting object), and verify the indication in the LCD.
“SBS, MRCC, DRCC Radar blocked” is not displayed
•  System is normal.
(Mis-operation due to soiling or foreign matter (reflecting object) on radar sensors or front bumper surface.)
“SBS, MRCC, DRCC Radar blocked” is displayed
•  Replace the radar sensor.
No
Go to the next step.
3
VERIFY RADAR SENSOR BRACKET
•  Verify that there is no bending or damage on the radar sensor bracket.
•  Is there bending or damage on the radar sensor bracket?
Yes
Replace the radar sensor bracket and perform the aiming adjustment.
(See RADAR SENSOR DISASSMBLY/ASSEMBLY [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
(See RADAR SENSOR AIMING [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
No
Go to the next step.
4
PERFORM RADAR SENSOR AIMING ADJUSTMENT
•  Perform the radar sensor aiming adjustment.
•  Perform the DTC inspection using the M-MDS.
•  Is DTC C1A67:54 displayed?
Yes
Perform inspection for DTC C1A67:54
(See DTC C1A67:54 [VEHICLE CONTROL MODULE (V/C-MODULE)].)
No
•  A temporary system malfunction can be considered.
•  Refer to the possible malfunctions and explain to the customer that there is no malfunction.
•  If the malfunction recurs, replace the radar sensor.