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DIAGNOSTIC TROUBLE CODE PROCEDURES SMART WIRING SYSTEM (SWS) USING SWS MONITOR 54C-34 YES : If a trouble is solved, it is determined that there is an intermittent malfunction such as − How to use troubleshooting/Inspection Service Points ). NO : Go to Step 3. Step 3. ECU check by using the SWS monitor Check that the power supply and earth lines to the • Ignition switch: OFF ECUS TO BE CHECKED • Column ECU • ETACS ECU OK: "OK" is displayed for all the items Q: Are the check result normal? Normal conditions are displayed for all the items. : The trouble can be an intermittent − How to Cope with Intermittent Malfunction "NG" is displayed on the "COLUMN ECU" menu. : Refer to Inspection Procedure A-2 ." "NG" is displayed on the "ETACS ECU" menu. : Refer to Inspection Procedure A-3 Diagnosis code No.03 Communication error with front-ECU CAUTION If diagnosis code No.03 is set in the ETACS-ECU, TROUBLE JUDGMENT The ETACS-ECU communicates with the front-ECU COMMENTS ON TROUBLE SYMPTOM The front-ECU, the ETACS-ECU, connector(s), or POSSIBLE CAUSES • Malfunction of the front-ECU • 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 Step 2. Check whether the diagnosis code is Check again if the diagnosis code is set. not reset. Q: Is the check result normal? YES : If a trouble is solved, it is determined that there is an intermittent malfunction such as − How to use troubleshooting/Inspection Service Points ). NO : Go to Step 3. Step 3. ECU check by using the SWS monitor Check that the power supply and earth lines to the • Ignition switch: OFF ECUS TO BE CHECKED • Front ECU • ETACS ECU OK: "OK" are displayed for all the items Q: Are the check result normal? |