DTC U3000:04 [RADAR UNIT]

id1502a6020400

Description

Smart brake support (SBS) system operation malfunction
Detection condition
•  The smart brake support (SBS) 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
•  Signal error in circuit between radar unit and radar unit
•  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.
•  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
VERIFY DSC HU/CM DTCs
•  Retrieve the DSC HU/CM DTCs using the M-MDS.
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [DSC HU/CM].)
No
Go to the next step.
5
VERIFY SAS CONTROL MODULE DTCs
•  Retrieve the SAS control module DTCs using the M-MDS.
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SAS CONTROL MODULE].)
No
Go to the next step.
6
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear the DTC for the radar unit using the M-MDS.
•  Retrieve the radar unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the radar unit.
Go to the next step.
No
Go to the next step.
7
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [RADAR UNIT].)
No
DTC troubleshooting completed.