DTC U0402:68 [ELECTRONIC 4WD CONTROL SYSTEM]
id0302a6201300
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DTC U0402:68 |
Abnormal message from TCM |
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DETECTION CONDITION
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• Correct data cannot be received from TCM
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FAIL-SAFE FUNCTION
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• Control maintained by the specified data.
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POSSIBLE CAUSE
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• TCM malfunction
• 4WD CM 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 |
Results |
Action |
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1
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INSPECT FOR TCM MALFUNCTION
• Using the M-MDS, perform the DTC inspection for the TCM.
• Is the DTC displayed?
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Yes
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Go to applicable DTC inspection.
DTC troubleshooting completed, then go to the next step.
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No
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Go to the next step.
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2
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VERIFY THAT THE SAME DTC IS NOT PRESENT
• Clear the DTCs from the memory.
• Using the M-MDS, perform the 4WD control module DTC inspection.
• Is the same DTC present?
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Yes
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Replace the 4WD CM, then go to the next step.
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No
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Go to the next step.
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3
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VERIFY THAT NO OTHER DTCS ARE PRESENT
• Are any other DTCs output?
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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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