CAN BUS DIAGNOSTICS TABLE

caution

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.

This diagnosis applies only to the CAN bus lines. If a different system is defective, proceed to the applicable diagnosis section for each system. Observe the diagnosis procedure below only when the CAN bus line is defective.

M.U.T.-III screen		Diagnosis detail	Reference page
(The ECUs that are not adopted are not displayed.)	Comment	Diagnosis detail	Reference page
<LHD>	Failure in red displayed area is estimated.	Diagnosis Item 1 Communication with no ECUs is possible (CAN-C).
<RHD>	Failure in red displayed area is estimated.
-	-	Diagnosis Item 2^*1 Diagnose shorts in the power supply to CAN-C.
-	-	Diagnosis Item 3^*1 Diagnose shorts in the earth to CAN-C.
-	-	Diagnosis Item 4^*1 Diagnose shorts between CAN_H and L lines (CAN-C).
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 5 Communication with no ECUs is possible (CAN-C-Mid).
-	-	Diagnosis Item 6^*2 Diagnose shorts in the power supply to CAN-C-Mid.
-	-	Diagnosis Item 7^*2 Diagnose shorts in the earth to CAN-C-Mid.
-	-	Diagnosis Item 8^*2 Diagnose shorts between CAN_H and L lines (CAN-C-Mid).
<LHD>	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 9 Diagnose when the M.U.T.-III cannot receive the data sent by ETACS-ECU.
<RHD>	CAN-C: Failure in red displayed area is estimated.
<LHD>	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 10 Diagnose when the M.U.T.-III cannot receive the data sent by SRS-ECU.
<RHD>	CAN-C: Failure in red displayed area is estimated.
<LHD>	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 11 Diagnose when the M.U.T.-III cannot receive the data sent by steering wheel sensor.
<RHD>	CAN-C: Failure in red displayed area is estimated.
<RHD>	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 12 Diagnose the lines between the joint connectors (CAN-4 and CAN3).
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 13 Diagnose when the M.U.T.-III cannot receive the data sent by 4WD-ECU <4WD>.
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 14 Diagnose when the M.U.T.-III cannot receive the data sent by LDW-ECU <Vehicles with LDW>.
<LHD>	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 15 Diagnose the lines between the joint connectors (CAN-3 and CAN1).
<RHD>	CAN-C: Failure in red displayed area is estimated.
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 16 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: Failure in red displayed area is estimated.	Diagnosis Item 17 Diagnose when the M.U.T.-III cannot receive the data sent by EPS-ECU.
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 18 Diagnose when the M.U.T.-III cannot receive the data sent by AS&G-ECU. <vehicles with AS&G system>
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 19 Diagnose when the M.U.T.-III cannot receive the data sent by CVT-ECU <CVT> or A/T-ECU <A/T>.
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 20 Diagnose the lines between the joint connectors (CAN-1 and CAN2).
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 21 Diagnose when the M.U.T.-III cannot receive the data sent by ACC/FCM-ECU <Vehicles with ACC>.
	CAN-C: Failure in red displayed area is estimated.	Diagnosis Item 22 Diagnose when the M.U.T.-III cannot receive the data sent by engine-ECU.
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 23 Diagnose when the M.U.T.-III cannot receive the data sent by KOS-ECU. <Vehicles with KOS>
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 24 Diagnose when the M.U.T.-III cannot receive the data sent by OSS-ECU. <Vehicles with OSS>
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 25 Diagnose when the M.U.T.-III cannot receive the data sent by CAN box unit and multivision display <vehicles with MMCS>.
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 26 Diagnose when the M.U.T.-III cannot receive the data sent by radio and CD player <vehicles with radio and CD player>.
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 27 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-Mid: Failure in red displayed area is estimated.	Diagnosis Item 28 Diagnose when the M.U.T.-III cannot receive the data sent by A/C-ECU.
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 29 Diagnose when the M.U.T.-III cannot receive the data sent by electric tailgate control unit <vehicles with electric tailgate>.
	CAN-C-Mid: Failure in red displayed area is estimated.	Diagnosis Item 30 Diagnose when the M.U.T.-III cannot receive the data sent by combination meter.

note

^*1: diagnosis items 2, 3 and 4 should be checked AFTER the cause of the fault is determined in diagnosis item 1 "Communication with no ECUs is possible (CAN-C)".
^*2: diagnosis items 6, 7 and 8 should be checked AFTER the cause of the fault is determined in diagnosis item 5 "Communication with no ECUs is possible (CAN-C-Mid)".