ECU CHECK

Use the M.U.T.-III and the SWS monitor to check ECUs (Refer to M.U.T.-III User’s Manual).
The following ECUs can be checked by using the M.U.T.-III and the SWS monitor.

note If a malfunction is found by the "ECU CHECK", proceed "Symptom Procedure" (Refer to ).

SWS MONITOR-COMPATIBLE ECUS AND THEIR CONDITIONS

Item No.	ECUs to be checked	Display on M.U.T.-III	Normal condition	ECU conditions
80	Column switch (column-ECU)	COLUMN ECU	OK^*1	All of the column switch, power supply, earth and interconnecting communication line are normal
83	ETACS-ECU	ETACS ECU	OK	All of the ETACS-ECU switch, power supply, earth and interconnecting communication line are normal
84	Front-ECU	FRONT ECU	OK^*2	All of the front-ECU, power supply, earth and interconnecting communication line are normal
85	Power window main switch (power window module)	P/W MODULE	OK^*2 (when the ignition switch is ON)	All of the power window main switch, power supply, earth and interconnecting communication line are normal
-	Other SWS-related ECUs	Other ECUs	NG	ECUs are not used

note

^*1: If "NG" is displayed beside the ETACS-ECU while the ignition switch is off, "NG" is also displayed beside the column-ECU.
^*2: If "NG" is displayed beside the ETACS-ECU, "NG" is also displayed beside the front-ECU and the power window main switch (power window module).