DTC C1A67:78 [RADAR UNIT]

id1502a6018200

System malfunction location

Radar unit axis is deviated
Detection condition
•  Radar unit axis deviation is detected.
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
•  Radiator grille on vehicle with radar unit not installed
•  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 malfunction
•  DSC HU/CM malfunction
•  SAS control module malfunction
•  Radar unit malfunction
System wiring diagram
•  Not applicable


Diagnostic Procedure

Step

Inspection

Action
1
VERIFY RADIATOR GRILLE
•  Is the radiator on a vehicle with a radar unit installed?
Yes
Go to the next step.
No
Replace the radiator grille on the vehicle with a radar unit, then go to Step 9.
2
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 9.
No
Go to the next step.
3
VERIFY AREA AROUND RADAR UNIT
•  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 9.
No
Go to the next step.
4
VERIFY LCD
•  Is the message indicating “Front radar blocked” displayed in the LCD in the instrument cluster?
Yes
Switch the ignition off (LOCK), leave it for 30 min to cool down the radar unit, switch the ignition ON (engine off or on) again, and verify the message indicating “Front radar blocked” in the LCD.
“Front radar blocked” is not displayed
•  Go to the next step.
“Front radar blocked” is displayed
•  Replace radar unit, then go to Step 9.
No
Go to the next step.
5
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.)
Then go to Step 9.
No
Go to the next step.
6
PERFORM DTC INSPECTION FOR DSC HU/CM
•  Perform the DSC HU/CM DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
Then go to Step 9.
No
Go to the next step.
7
PERFORM DTC INSPECTION FOR SAS CONTROL MODULE
•  Perform the SAS control module DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SAS CONTROL MODULE].)
Then go to Step 9.
No
Go to the next step.
8
PERFORM DTC INSPECTION FOR RADAR UNIT
•  Perform the radar unit DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [RADAR UNIT].)
Then go to the next step.
No
Go to the next step.
9
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear radar unit DTCs using the M-MDS.
•  Switch the ignition ON (engine on).
•  Perform the radar unit DTC inspection using the M-MDS.
•  Is the same 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.
Go to the next step.
No
Go to the next step.
10
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.