DTC C1A67:92 [VEHICLE CONTROL MODULE (V/C-MODULE)]

id0102i0001800

System malfunction location

Radar sensor sensitivity lowered
Detection condition
•  Radar sensor sensitivity decreases.
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, snow, or thick moisture film (such as condensation) is adhering to surface of radar sensor or radiator grille ornament
•  Reflective object is adhering to radar sensor surface and the area around it
•  Radar sensor malfunction
•  Vehicle control module (V/C-module) 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 material (reflective object) is adhering to radiator grille ornament
Yes
Return the surfaces of the radiator grille ornament to their normal condition, then go to Step 4.
No
Go to the next step.
2
VERIFY AREA AROUND RADAR SENSOR
•  Remove front bumper.
•  Visually inspect the surface of the radar sensor.
•  Under the following conditions?
―  Dirt is adhering to radar sensor
―  Foreign material (reflective object) is adhering to radar sensor
Yes
Return the radar sensor to their normal condition, then go to Step 4.
No
Go to the next step.
3
VERIFY CENTER DISPLAY INDICATION
•  Is the message indicating “SBS, MRCC, DRCC Radar Malfunction” displayed in the center display?
Yes
Switch the ignition off, leave it for 30 min to cool down the radar sensor, switch the ignition ON (engine off or on) again, and verify the message indicating “SBS, MRCC, DRCC Radar Malfunction in the center display.
“SBS, MRCC, DRCC Radar Malfunction” is not displayed
•  Go to the next step.
“SBS, MRCC, DRCC Radar Malfunction” is displayed
•  Replace radar sensor, then go to Step 9.
No
Go to the next step.
4
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear vehicle control module (V/C-module) DTCs using the M-MDS.
•  Switch the ignition ON (engine on).
•  Drive the vehicle at 40 km/h (25 mph) or more for 3 min or more.
•  Perform the vehicle control module (V/C-module) DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the vehicle control module (V/C-module).
Go to the next step.
No
Go to the next step.
5
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.