MRCC/SBS/DRSS MIS-OPERATION [RADAR UNIT]

id1503a1010700

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 units.

• MRCC unintentional vehicle speed decrease

• MRCC unintentional vehicle speed increase

Possible malfunction

Note

• The detection performance of the radar unit has limitations and the mazda radar cruise control (MRCC) system may not operate normally. For the detection performance limitations, refer to the [RADAR UNIT] in the technical guide.

• Radar unit and radiator grille ornament soiling, scratches, or loss

• Radar axis deviation due to impact around radar unit

• Radar axis deviation due to poor radar unit installation

• Aiming adjustment not implemented

• Poor radar unit

• DSC HU/CM malfunction

• SAS control module malfunction

• Radar unit 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

Without center display

Step

Inspection

Action

1

VERIFY AREA AROUND RADAR UNIT

•  Visually inspect the surface of the radar unit or front bumper for any of the following conditions:

―  Dirt is adhering to radar unit surface

―  Dirt is adhering to front bumper surface

―  Foreign matter (reflective object) is adhering to radar unit

―  Foreign matter (reflective object) is adhering to front bumper

Yes

Clean and remove foreign matter from the radar units and surface of the front bumper (reflecting object).

No

Go to the next step.

2

VERIFY RADAR UNIT BRACKET

•  Verify that there is no bending or damage on the radar unit bracket.

•  Is there bending or damage on the radar unit bracket?

Yes

Replace the radar unit bracket and perform the aiming adjustment.

(See RADAR UNIT DISASSMBLY/ASSEMBLY.)

(See RADAR UNIT AIMING.)

No

Go to the next step.

3

PERFORM RADAR UNIT AIMING ADJUSTMENT

•  Perform the radar unit aiming adjustment.
(See RADAR UNIT DISASSMBLY/ASSEMBLY.)

•  Perform the DTC inspection using the M-MDS.
(See DTC INSPECTION [RADAR UNIT].)

•  Is DTC C1A67:54 displayed?

Yes

Perform inspection for DTC C1A67:54

(See DTC C1A67:54 [RADAR UNIT].)

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 unit.
(See RADAR UNIT REMOVAL/INSTALLATION.)

Step	Inspection	Action
1	VERIFY AREA AROUND RADAR UNIT • Visually inspect the surface of the radar unit or front bumper for any of the following conditions: ― Dirt is adhering to radar unit surface ― Dirt is adhering to front bumper surface ― Foreign matter (reflective object) is adhering to radar unit ― Foreign matter (reflective object) is adhering to front bumper	Yes	Clean and remove foreign matter from the radar units and surface of the front bumper (reflecting object).
No	Go to the next step.
2	VERIFY RADAR UNIT BRACKET • Verify that there is no bending or damage on the radar unit bracket. • Is there bending or damage on the radar unit bracket?	Yes	Replace the radar unit bracket and perform the aiming adjustment. (See RADAR UNIT DISASSMBLY/ASSEMBLY.) (See RADAR UNIT AIMING.)
No	Go to the next step.
3	PERFORM RADAR UNIT AIMING ADJUSTMENT • Perform the radar unit aiming adjustment. (See RADAR UNIT DISASSMBLY/ASSEMBLY.) • Perform the DTC inspection using the M-MDS. (See DTC INSPECTION [RADAR UNIT].) • Is DTC C1A67:54 displayed?	Yes	Perform inspection for DTC C1A67:54 (See DTC C1A67:54 [RADAR UNIT].)
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 unit. (See RADAR UNIT REMOVAL/INSTALLATION.)

With center display

Step

Inspection

Action

1

VERIFY CENTER DISPLAY

•  Is the message indicating “The SBS/MRCC/DRSS radar (sensor) is soiled.Clean the entire surface of the radar (sensor).” displayed in the center display?

Yes

Go to the next step.

No

Go to Step 3.

2

VERIFY AREA AROUND RADAR UNIT

•  Visually inspect the surface of the radar unit or front bumper for any of the following conditions:

―  Dirt is adhering to radar unit surface

―  Dirt is adhering to front bumper surface

―  Foreign matter (reflective object) is adhering to radar unit

―  Foreign matter (reflective object) is adhering to front bumper

Yes

•  Clean and remove foreign matter from the radar units and surface of the front bumper (reflecting object), and verify the message indicating “The SBS/MRCC/DRSS radar (sensor) is soiled.Clean the entire surface of the radar (sensor).”

Message is not displayed

•  System is normal.
(Mis-operation due to soiling or foreign matter (reflecting object) on radar units or front bumper surface.)

Message is displayed

•  Replace the radar unit.
(See RADAR UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

3

VERIFY RADAR UNIT BRACKET

•  Verify that there is no bending or damage on the radar unit bracket.

•  Is there bending or damage on the radar unit bracket?

Yes

Replace the radar unit bracket and perform the aiming adjustment.

(See RADAR UNIT DISASSMBLY/ASSEMBLY.)

(See RADAR UNIT AIMING.)

No

Go to the next step.

4

PERFORM RADAR UNIT AIMING ADJUSTMENT

•  Perform the radar unit aiming adjustment.
(See RADAR UNIT DISASSMBLY/ASSEMBLY.)

•  Perform the DTC inspection using the M-MDS.
(See DTC INSPECTION [RADAR UNIT].)

•  Is DTC C1A67:54 displayed?

Yes

Perform inspection for DTC C1A67:54

(See DTC C1A67:54 [RADAR UNIT].)

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 unit.
(See RADAR UNIT REMOVAL/INSTALLATION.)

Step	Inspection		Action
1	VERIFY CENTER DISPLAY • Is the message indicating “The SBS/MRCC/DRSS radar (sensor) is soiled.Clean the entire surface of the radar (sensor).” displayed in the center display?	Yes	Go to the next step.
1		No	Go to Step 3.
2	VERIFY AREA AROUND RADAR UNIT • Visually inspect the surface of the radar unit or front bumper for any of the following conditions: ― Dirt is adhering to radar unit surface ― Dirt is adhering to front bumper surface ― Foreign matter (reflective object) is adhering to radar unit ― Foreign matter (reflective object) is adhering to front bumper	Yes	• Clean and remove foreign matter from the radar units and surface of the front bumper (reflecting object), and verify the message indicating “The SBS/MRCC/DRSS radar (sensor) is soiled.Clean the entire surface of the radar (sensor).” Message is not displayed • System is normal. (Mis-operation due to soiling or foreign matter (reflecting object) on radar units or front bumper surface.) Message is displayed • Replace the radar unit. (See RADAR UNIT REMOVAL/INSTALLATION.)
2		No	Go to the next step.
3	VERIFY RADAR UNIT BRACKET • Verify that there is no bending or damage on the radar unit bracket. • Is there bending or damage on the radar unit bracket?	Yes	Replace the radar unit bracket and perform the aiming adjustment. (See RADAR UNIT DISASSMBLY/ASSEMBLY.) (See RADAR UNIT AIMING.)
3		No	Go to the next step.
4	PERFORM RADAR UNIT AIMING ADJUSTMENT • Perform the radar unit aiming adjustment. (See RADAR UNIT DISASSMBLY/ASSEMBLY.) • Perform the DTC inspection using the M-MDS. (See DTC INSPECTION [RADAR UNIT].) • Is DTC C1A67:54 displayed?	Yes	Perform inspection for DTC C1A67:54 (See DTC C1A67:54 [RADAR UNIT].)
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 unit. (See RADAR UNIT REMOVAL/INSTALLATION.)