DTC U0028:88 [CONNECTIVITY MASTER UNIT]
id0902n7106300
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Description |
Unit communication error (LOCAL-CAN) |
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Detection condition
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• The connectivity master unit (CMU) detects CAN bus communication line (LOCAL-CAN) malfunction 10 times continuously.
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Fail-safe function
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• Not applicable
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Possible cause
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• Malfunction in CAN bus communication line
• Connectivity master unit (CMU) 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 IF OTHER DTCs DISPLAYED FOR CONNECTIVITY MASTER UNIT (CMU)
• Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 7 s or more.
• Perform the DTC inspection for the connectivity master unit (CMU) using the M-MDS.
• Is DTC U00184:00 or U0187:00 displayed?
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Yes
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Repair the malfunctioning location 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 IF MALFUNCTIONING LOCATION IS CONNECTIVITY MASTER UNIT (CMU)
• Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 7 s or more.
• Perform the DTC inspection for the connectivity master unit (CMU) using the M-MDS.
• Is the same DTC displayed?
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Yes
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Replace the connectivity master unit (CMU), 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 IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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