DTC U0420:68 [HEADLIGHT AUTO LEVELING SYSTEM]
id0902i7017500
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Description |
Error signal received from EPS control module |
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Detection condition
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• Auto leveling control module received the error signal from the EPS control module for 5 s or more with the ignition switched ON (engine off or on).
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Fail-safe function
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• Control of the headlight auto leveling system is continued.
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Possible cause
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• DTCs are stored in the EPS control module.
• EPS control module malfunction
• Auto leveling control module 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 EPS CONTROL MODULE DTCs
• Retrieve the EPS control module DTCs using the M-MDS.
• 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.
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No
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Go to the next step.
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2
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PERFORM DTC INSPECTION AND VERIFY EPS CONTROL MODULE MALFUNCTION
• Clear the DTC for the auto leveling control module using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the auto leveling control module DTCs using the M-MDS.
• Is the same DTC displayed?
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Yes
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Replace the EPS control module, then go to the next step.
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No
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Go to Step 4.
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3
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Clear the DTC for the auto leveling control module using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the auto leveling control module 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 auto leveling control module.
Go to the 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 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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