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

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2014 - Mazda6 - Engine

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

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.

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 (V/C-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

Effects 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 “FOW, MRCC Radar blocked” displayed in the LCD in the instrument cluster?	Yes	Go to the next step.
1		No	Go to Step 3.
2	VERIFY AREA AROUND RADAR SENSOR Visually inspect the surface of the radar sensor or front bumper for any of the following conditions: Dirt is adhering to radar sensor surface Dirt is adhering to front bumper surface Foreign matter (reflective object) is adhering to radar sensor Foreign matter (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. “FOW, MRCC 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.) “FOW, MRCC Radar blocked” is displayed Replace the radar sensor. (See RADAR SENSOR REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
2		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].)
3		No	Go to the next step.
4	PERFORM RADAR SENSOR AIMING ADJUSTMENT Perform the radar sensor aiming adjustment. (See RADAR SENSOR AIMING [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].) Perform the DTC inspection using the M-MDS. (See DTC INSPECTION [VEHICLE CONTROL MODULE (V/C-MODULE)].) Is DTC C1A67:54 displayed?	Yes	Perform inspection for DTC C1A67:54 (See DTC C1A67:54 [VEHICLE CONTROL MODULE (V/C-MODULE)].)
4		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. (See RADAR SENSOR REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)

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