DTC C1A67:92 [RADAR UNIT]
id1502a6018300
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Description |
Radar unit sensitivity lowered |
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Detection condition
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• Radar unit sensitivity decreases.
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Fail-safe
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• 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
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Possible cause
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• Dirt, snow, or thick moisture film (such as condensation) is adhering to surface of radar unit or radiator grille ornament
• Reflective object is adhering to radar unit surface and the area around it
• Radar unit malfunction
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System wiring diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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VERIFY AREA AROUND RADIATOR GRILLE ORNAMENT
• Visually inspect the area around the radiator grille ornament for the following:
• Is there any dirt, foreign matter (reflective object) or damage, or are there any scratches around the radiator grille?
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Yes
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Return the surfaces of the radiator grille ornament to their normal condition, then go to Step 4.
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No
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Go to the next step.
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2
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VERIFY AREA AROUND RADAR UNIT
• Remove front bumper.
(See FRONT BUMPER REMOVAL.)
(See FRONT BUMPER INSTALLATION.)
• Visually inspect the area around the radar unit for the following:
• Is there any dirt, foreign matter (reflective object) or damage, or are there any scratches around the radar unit?
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Yes
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Return the radar unit to their normal condition, then go to Step 4.
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No
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Go to the next step.
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3
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VERIFY MULTI-INFORMATION DISPLAY
• Verify if "Front radar blocked" is displayed in the instrument cluster multi-information display.
• Is "Front radar blocked" displayed?
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Yes
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Switch the ignition off, 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 multi-information display.
“Front radar blocked” is not displayed
• Go to the next step.
“Front radar blocked” is displayed
• Replace radar unit, then go to next step.
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No
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Go to the next step.
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4
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Clear the DTC for the radar unit using the M-MDS.
(See CLEARING DTC [RADAR UNIT].)
• Drive the vehicle at 40 km/h (25 mph) or more for 3 min or more.
• Retrieve the radar unit DTCs using the M-MDS.
(See DTC INSPECTION [RADAR UNIT].)
• Is the same DTC displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the radar unit.
Go to the next step.
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No
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Go to the next step.
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5
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [RADAR UNIT].)
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No
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DTC troubleshooting completed.
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