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DIAGNOSTIC TROUBLE CODE PROCEDURES SMART WIRING SYSTEM (SWS) USING SWS MONITOR 54C-42 POSSIBLE CAUSES • Malfunction of the combination meter • Malfunction of the ETACS-ECU • Damaged harness wires and connectors DIAGNOSIS PROCEDURE Step 1. MUT-III CAN bus diagnostics Use the MUT-III to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus line (Refer to GROUP − Diagnosis go to Step 6. Step 2. MUT-III diagnosis code Check whether the combination meter-related Q: Is the diagnosis code set? YES : Diagnose the combination meter (Refer to GROUP 54A − Troubleshooting NO : Go to Step 3. Step 3. MUT-III diagnosis code Check if a diagnosis code, which relates to CAN • Engine U1108: Combination meter time-out diagnosis code Q: Is the diagnosis code set? YES : Go to Step 4. NO : Go to Step 5. Step 4. Check whether the diagnosis code is Check again if the diagnosis code is set. not reset. Q: Is the check result normal? YES : A poor connection, open circuit or other intermittent malfunction is present in the − How to Use Troubleshooting/Inspection Service Points ). NO : Replace the combination meter, and then go Step 5. Check whether the diagnosis code is Check again if the diagnosis code is set. not reset. Q: Is the check result normal? YES : A poor connection, open circuit or other intermittent malfunction is present in the − How to Use Troubleshooting/Inspection Service Points ). NO : Replace the ETACS-ECU, and then go to Step 6. Check whether the diagnosis code is Recheck if the diagnosis code is set. not reset. Q: Is the check result normal? YES : The procedure is complete. NO : Return to Step 1. Diagnosis code No.21 Meter failure information CAUTION If diagnosis code No.21 is set in the ETACS-ECU, CAUTION Whenever the ECU is replaced, ensure that the TROUBLE JUDGMENT The ETACS-ECU receives vehicle speed-related |