DIAGNOSIS PROCEDURE |
STEP 1. Check that the engine-ECU communicates with the M.U.T.-III. |
Check whether the DIESEL system-related diagnosis code is set. |
Q.
Is the check result satisfactory?
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Go to Step 2. |
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Diagnose DIESEL system. (Refer to GROUP 13A, Troubleshooting .) |
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STEP 2. M.U.T.-III CAN bus diagnostics |
Use the M.U.T.-III to diagnose the CAN bus lines. |
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 54C, Diagnosis - Can Bus Diagnostics
Table ). |
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