DTC C1A67:78 [RADAR UNIT]
id1502a6018200
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Description |
Radar unit axis is deviated |
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Detection condition
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• Radar unit axis deviation is detected.
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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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• 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
• Radar unit bracket malfunction
• 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 IF RADIATOR GRILLE IS CORRECTLY INSTALLED
• Verify the radiator grille installation condition on vehicles equipped with a radar unit.
• Is the installation condition normal?
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Yes
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Go to the next step.
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No
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Replace the radiator grille on the vehicle with a radar unit, then go to Step 6.
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2
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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 6.
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No
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Go to the next step.
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3
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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 6.
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No
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Go to the next step.
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4
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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 Step 6.
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No
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Go to the next step.
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5
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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?
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Yes
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Replace the radar unit bracket and perform the aiming adjustment.
(See RADAR UNIT AIMING.)
Go to the next step.
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No
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Go to the next step.
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6
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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].)
• 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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7
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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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