DTC U3003:17 [RADAR UNIT]
id1502a6023600
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Description |
Radar unit power supply voltage increases |
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Detection condition
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• Radar unit power supply voltage is 16.3 V or more.
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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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• DTCs are stored in the PCM
• Battery malfunction
• Generator 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 PCM DTCs
• Retrieve the PCM DTCs using the M-MDS.
• 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.
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No
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Go to the next step.
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2
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INSPECT BATTERY
• Inspect the battery.
(See BATTERY INSPECTION.)
• Is the battery 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 battery, then go to Step 4.
(See BATTERY REMOVAL/INSTALLATION.)
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3
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INSPECT GENERATOR
• Inspect the generator.
• Is the generator 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 generator, then 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].)
• 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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