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If the system does not communicate with the M.U.T.-III, power supply to the diagnosis connector
or CAN bus lines may be defective.
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- Damaged harness wires and connectors
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Check that the M.U.T.-III communicates with the engine-ECU <M/T> or
the engine-A/T-ECU when the M.U.T.-III is operated..
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Q.
Is the check result satisfactory?
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Perform MPI system troubleshooting. (Refer to GROUP 13A, Troubleshooting or
GROUP 13B, Troubleshooting .)
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result satisfactory?
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Diagnose the power supply circuit. Refer to .
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Repair the CAN bus lines (Refer to GROUP 54F, Diagnosis - Can Bus Diagnostics
Table ).
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