DTC U3000:04 [RADAR UNIT]

id1502a6020400

Description

Mazda radar cruise control (MRCC) system operation malfunction

Detection condition

•  The MRCC brake is operated excessively

Fail-safe

•  Inhibits the Mazda radar cruise control (MRCC) system control

•  Inhibits the smart brake support (SBS) system control

•  Inhibits the distance recognition support system (DRSS) control

Possible cause

•  Dirt on radiator grille ornament, modifications, application of stickers (including transparent types), scratches, or damage

•  Dirt on radar unit, scratches, or damage

•  Impact is transmitted to area around radar unit

•  Incorrect installation of radar unit

•  Radar unit aiming adjustment error

•  DSC HU/CM malfunction

•  SAS control module malfunction

•  Radar unit malfunction

System wiring diagram

Not applicable

Description	Mazda radar cruise control (MRCC) system operation malfunction
Detection condition	• The MRCC brake is operated excessively
Fail-safe	• Inhibits the Mazda radar cruise control (MRCC) system control • Inhibits the smart brake support (SBS) system control • Inhibits the distance recognition support system (DRSS) control
Possible cause	• Dirt on radiator grille ornament, modifications, application of stickers (including transparent types), scratches, or damage • Dirt on radar unit, scratches, or damage • Impact is transmitted to area around radar unit • Incorrect installation of radar unit • Radar unit aiming adjustment error • DSC HU/CM malfunction • SAS control module malfunction • Radar unit malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY AREA AROUND RADIATOR GRILLE ORNAMENT

•  Visually inspect the surface of the radiator grille ornament.

•  Under the following conditions?

―  Dirt is adhering to radiator grille ornament.

―  Foreign matter (reflective object) is adhering to radiator grille ornament

―  Radiator grille ornament is scratched or damaged

Yes

Return the surfaces of the radiator grille ornament to their normal condition, then go to Step 6.

No

Go to the next step.

2

VERIFY AREA AROUND RADAR SENSOR

•  Remove front bumper.
(See FRONT BUMPER REMOVAL/INSTALLATION.)

•  Visually inspect the surface of the radar unit.

•  Under the following conditions?

―  Dirt is adhering to radar unit

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

―  Radar unit is scratched or damaged

Yes

Return the radar unit to their normal condition, then go to Step 6.

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.)

Go to Step 6.

No

Go to the next step.

4

PERFORM DTC INSPECTION FOR DSC HU/CM

•  Perform the DSC HU/CM DTC inspection using the M-MDS.
(See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)

Go to Step 6.

No

Go to the next step.

5

PERFORM DTC INSPECTION FOR SAS CONTROL MODULE

•  Perform the SAS control module DTC inspection using the M-MDS.
(See DTC INSPECTION [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

(See DTC INSPECTION [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

(See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].)

Go to the next step.

No

Go to the next step.

6

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

•  Clear radar unit DTCs using the M-MDS.
(See CLEARING DTC [RADAR UNIT].)

•  Switch the ignition ON (engine on).

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

•  Is the same Pending DTC present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction does not recur, go to the next step.

•  If the malfunction recurs, replace the radar unit.
(See RADAR UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Verify other DTCs displayed.

•  Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

Step	Inspection		Action
1	VERIFY AREA AROUND RADIATOR GRILLE ORNAMENT • Visually inspect the surface of the radiator grille ornament. • Under the following conditions? ― Dirt is adhering to radiator grille ornament. ― Foreign matter (reflective object) is adhering to radiator grille ornament ― Radiator grille ornament is scratched or damaged	Yes	Return the surfaces of the radiator grille ornament to their normal condition, then go to Step 6.
1		No	Go to the next step.
2	VERIFY AREA AROUND RADAR SENSOR • Remove front bumper. (See FRONT BUMPER REMOVAL/INSTALLATION.) • Visually inspect the surface of the radar unit. • Under the following conditions? ― Dirt is adhering to radar unit ― Foreign matter (reflective object) is adhering to radar unit ― Radar unit is scratched or damaged	Yes	Return the radar unit to their normal condition, then go to Step 6.
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.) Go to Step 6.
3		No	Go to the next step.
4	PERFORM DTC INSPECTION FOR DSC HU/CM • Perform the DSC HU/CM DTC inspection using the M-MDS. (See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].) Go to Step 6.
4		No	Go to the next step.
5	PERFORM DTC INSPECTION FOR SAS CONTROL MODULE • Perform the SAS control module DTC inspection using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].) (See DTC INSPECTION [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].) (See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].) Go to the next step.
5		No	Go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear radar unit DTCs using the M-MDS. (See CLEARING DTC [RADAR UNIT].) • Switch the ignition ON (engine on). • Perform the radar unit DTC inspection using the M-MDS. (See DTC INSPECTION [RADAR UNIT].) • Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction does not recur, go to the next step. • If the malfunction recurs, replace the radar unit. (See RADAR UNIT REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT • Verify other DTCs displayed. • Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
7		No	DTC troubleshooting completed.