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MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS) CHASSIS ELECTRICAL 54A-366 Code No.B2477: Chassis No. not programmed CAUTION • If the diagnosis code No. B2477 is set, be sure to diagnose the CAN bus line. • When replacing the CAN box unit, always check that the communication circuit is nor- TROUBLE JUDGEMENT PROBABLE CAUSES • Malfunction of the CAN bus line. • Malfunction of the ETACS-ECU. • Malfunction of the CAN box unit. DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III CAN bus diagnostics Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus line (Refer to GROUP − Troubleshooting ). STEP 2. M.U.T.-III other system diagnosis code Q: Is the diagnosis code set? YES : Diagnose the ETACS-ECU (Refer to GROUP 54A − ETACS-ECU − Troubleshooting ). NO : Go to Step 3. STEP 3. Recheck for diagnosis code. position to "ON" position. (3) Check if diagnosis code is set. Q: Is the diagnosis code set? YES : Replace the CAN box unit. NO : The trouble can be an intermittent − How to Cope with Intermittent Malfunction ). Code No.U0019 Bus off (CAN-B) CAUTION • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior • Before replacing the CAN box unit, be sure to check that the power supply circuit, earth cir- TROUBLE JUDGEMENT COMMENTS ON TROUBLE SYMPTOM PROBABLE CAUSES • Malfunctions of CAN box unit • Malfunction of CAN bus line wiring harness and connector DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III CAN bus diagnostics Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus line (Refer to GROUP − Troubleshooting ). STEP 2. Check whether the M.U.T.-III can Q: Is the check result normal? YES : Erase the diagnosis code. This diagnosis is complete. NO : Check the power supply circuit of the CAN |