DTC U0121:82 [PARKING ASSIST UNIT]
id0902q6242200
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Description |
Error signal received from DSC HU/CM |
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Detection condition
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• Parking assist unit receives the error signal from the DSC HU/CM for 5 s or more with the ignition switched ON (engine off or on).
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Fail-safe
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Not applicable
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Possible cause
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• DTCs are stored in the DSC HU/CM.
• DSC HU/CM malfunction
• Parking assist 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 OTHER PARKING ASSIST UNIT DTCs
• Clear the DTC for the parking assist unit using the M-MDS.
• Retrieve the parking assist unit DTCs using the M-MDS.
• Is DTC U3000:49 displayed?
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Yes
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Replace the parking assist unit, 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 DSC HU/CM DTCs
• Retrieve the DSC HU/CM DTCs using the M-MDS.
(See DTC INSPECTION [DSC HU/CM].)
• Are any 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 [DSC HU/CM].)
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No
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Go to the next step.
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3
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VERIFY IF MALFUNCTIONING LOCATION IS DSC HU/CM DEPENDING ON REPEATABILITY
• Clear the DTC for the parking assist unit using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the parking assist unit DTCs using the M-MDS.
• Is the same DTC displayed?
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Yes
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Replace the DSC HU/CM, then go to the next step.
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No
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Go to Step 5.
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4
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Clear the DTC for the parking assist unit using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the parking assist unit DTCs using the M-MDS.
• 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 parking assist unit.
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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.
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No
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DTC troubleshooting completed.
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