ECU CHECK

Use the M.U.T.-III and the SWS monitor to check ECUs.
1.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

2.SWS monitor-compatible ECUs and their conditions

Item No.	ECUs to be checked	Display on M.U.T.-III	Normal condition	ECU condition
Item 80	Column switch (column-ECU)	COLUMN ECU	OK^*1	All of the column switch, power supply, earth and interconnecting communication line are normal
Item 81	Multi-centre display	CENTRE DISP	NG	The M.U.T.-III always displays "NG" due to CAN communication.
Item 83	ETACS-ECU	ETACS ECU	OK	All of the ETACS-ECU switch, power supply, earth and interconnecting communication line are normal
Item 84	Front-ECU	FRONT ECU	OK^*2	All of the front-ECU, power supply, earth and interconnecting communication line are normal
Item 85	Power window main switch (power window module) <Vehicles for South Africa>	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
Item 86	Sunroof motor assembly (sunroof-ECU)	SUNROOF ECU	OK^*2	All of the sunroof motor assembly, 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 the M.U.T.-III shows "NG" beside the ETACS-ECU, it also shows "NG" beside the power window main switch (power window module).