|
|
COMBINATION METER CHASSIS ELECTRICAL 54A-49 PROBABLE CAUSES • Malfunction of CAN bus line • Malfunction of the CAN box unit (MMCS) • Malfunction of the combination meter 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 ). Repair the CAN bus line and go to Step 6. STEP 2. M.U.T.-III other system diagnosis code Q: Is the diagnosis code set? YES : Troubleshoot the CAN box unit (MMCS). NO : Go to Step 3. STEP 3. M.U.T.-III other system diagnosis code • Code No.U0245: AND CAN timeout Q: Is the diagnosis code set? YES : Go to Step 4. NO : Go to Step 5. STEP 4. Check whether the diagnosis code is not reset. Q: Is the diagnosis code set? YES : Replace CAN box unit (MMCS) and then go to Step 6. NO : A poor connection, open circuit or other − How to use troubleshooting/Inspection Service Points ). STEP 5. Check whether the diagnosis code is not reset. Q: Is the diagnosis code set? YES : Replace combination meter and then go to Step 6. NO : A poor connection, open circuit or other − How to use troubleshooting/Inspection Service Points ). STEP 6. Check whether the diagnosis code is not reset. Q: Is the diagnosis code set? YES : Go to Step 1. NO : The procedure is complete. Code No.U1000 OSS CAN timeout CAUTION • If the diagnosis code No. U1000 is set, be sure to diagnose the CAN bus line. • Before replacing the ECU or combination meter, ensure that the power supply circuit, DIAGNOSTIC FUNCTION If the signal from OSS-ECU cannot be received, the combination meter sets the diagnosis code No. JUDGEMENT CRITERIA With the ignition switch is at ON position, the diagno- |