CAN BUS DIAGNOSTICS TABLE

caution

A diagnosis code may not also be set in the CAN-B lines under the conditions below. If no diagnosis code has been set due to electrical noise, confirm diagnosis item 25 .

Open circuit at the CAN_H side of the CAN-B bus lines
Open circuit at the CAN_L side of the CAN-B bus line
Short to earth at the CAN_H side of the CAN-B bus line

During diagnosis, a diagnosis code associated with another system may be set when the ignition switch is turned on with connector(s) disconnected. After completing the repair, confirm all systems for diagnosis code(s). If diagnosis code(s) are set, erase them all.

M.U.T.-III screen		Diagnosis detail	Reference page
(The ECUs that are not adopted are not displayed).	Comment	Diagnosis detail	Reference page
	Trouble is suspected in the section displayed in red.	Diagnosis Item 1 Diagnose when the M.U.T.-III cannot receive the data sent by ETACS-ECU
	Trouble is suspected in the section displayed in red.	Diagnosis Item 2 Malfunction of the ETACS-ECU
	CAN-C: A bus-off failure is present in the gateway ECU.	Diagnosis Item 3 Abnormal short between the CAN-C bus lines
	CAN-C: Earthing in red displayed area is estimated	Diagnosis Item 4 Diagnose shorts in the earth to CAN-C bus line
	CAN-C: Short circuit to battery in red displayed area is estimated	Diagnosis Item 5 Diagnose shorts in the power supply to CAN-C bus line
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 6 Diagnose when the M.U.T.-III cannot receive the data sent by steering wheel sensor <vehicles with ASC or headlamp automatic levelling system>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 7 Diagnose when the M.U.T.-III cannot receive the data sent by 4WD-ECU <4WD>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 8 Diagnose when the M.U.T.-III cannot receive the data sent by corner sensor/back sensor-ECU <vehicles with reversing sensor system>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 9 Diagnose when the M.U.T.-III cannot receive the data sent by CVT-ECU <CVT>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 10 Diagnose when the M.U.T.-III cannot receive the data sent by ABS-ECU <vehicles without ASC> or ASC-ECU <vehicles with ASC>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 11 Diagnose when the M.U.T.-III cannot receive the data sent by headlamp automatic levelling-ECU <vehicles with headlamp automatic levelling system>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 12 Diagnose when the M.U.T.-III cannot receive the data sent by EPS-ECU
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 13 Diagnose when the M.U.T.-III cannot receive the data sent by AS&G-ECU <vehicles with automatic stop & go system>
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 14 Diagnose when the M.U.T.-III cannot receive the data sent by engine-ECU
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 15 Diagnose the lines between the ETACS-ECU and joint connector (CAN2)
	CAN-C: Disconnection in red displayed area is estimated.	Diagnosis Item 16 Diagnose the lines between joint connector (CAN2) and joint connector (CAN3)
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 17 Diagnose when the M.U.T.-III cannot receive the data sent by KOS-ECU <vehicles with KOS>
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 18 Diagnose when the M.U.T.-III cannot receive the data sent by WCM <vehicles without KOS>
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 19 Diagnose when the M.U.T.-III cannot receive the data sent by SRS-ECU
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 20 Diagnose when the M.U.T.-III cannot receive the data sent by heater control panel <vehicles without A/C> or A/C control panel <vehicles with A/C>
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 21 Diagnose when the M.U.T.-III cannot receive the data sent by combination meter
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 22 Diagnose when the M.U.T.-III cannot receive the data sent by OSS-ECU <vehicles with KOS>
	CAN-B: A failure in the red section, or a bus-off failure is present in the gateway ECU.	Diagnosis Item 23 Short to power supply or earth in both CAN_H and CAN_L lines of the CAN-B bus lines.
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 24 Diagnose the ETACS-ECU, joint connector (CAN1) or lines between ETACS-ECU and joint connector (CAN1)
	CAN-B: Disconnection in red displayed area is estimated.	Diagnosis Item 25 Short to power supply or earth, open circuit or line-to-line short in the CAN-B bus lines