DTC U0401:68 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]
id09021c399300
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DESCRIPTION |
Signal error from PCM |
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DETECTION CONDITION
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• Keyless control module receive engine state or engine speed data from PCM, while steering is locked.
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POSSIBLE CAUSE
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• PCM malfunction
• Keyless control module malfunction
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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VERIFY ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM DTC
• Clear the DTC from the keyless control module using the M-MDS.
• Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
• Are the following DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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2
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VERIFY PCM DTC
• Perform the PCM DTC inspection using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0 DISI].)
(See DTC TABLE [MZR-CD 2.2].)
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No
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Go to the next step.
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3
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VERIFY PCM MALFUNCTION
• Clear the DTC from the keyless control module using the M-MDS.
• Switch the ignition to off, then open the door to lock the steering.
• Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
• Is the DTC U0401:68 present?
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Yes
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Replace the PCM, 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 TROUBLESHOOTING COMPLETED
• Clear the DTC from the keyless control module using the M-MDS.
• Switch the ignition to off, then open the door to lock the steering.
• Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
• Is the DTC U0401:68 present?
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Yes
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Repeat the inspection from Step 1.
If the malfunction recurs, replace the keyless control module, then 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 THAT NO OTHER DTCs ARE PRESENT
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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