CAN BUS DIAGNOSTICS TABLE



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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


Failure in red displayed area is estimated.
 Diagnosis Item 1
Communication with no ECUs is possible (CAN-C).
-
 -
 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*3: Failure in red displayed area is estimated.
 Diagnosis Item 5
Communication with no ECUs is possible (GW-CAN-C). <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>
-
 -
 Diagnosis Item 6*2
Diagnose shorts in the power supply to GW-CAN-C. <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>
-
 -
 Diagnosis Item 7*2
Diagnose shorts in the earth to GW-CAN-C. <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>
-
 -
 Diagnosis Item 8*2
Diagnose shorts between CAN_H and L lines (GW-CAN-C). <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>


CAN-C-Mid: Failure in red displayed area is estimated.
 Diagnosis Item 9
Communication with no ECUs is possible (CAN-C-Mid).
-
 -
 Diagnosis Item 10*2
Diagnose shorts in the power supply to CAN-C-Mid.
-
 -
 Diagnosis Item 11*2
Diagnose shorts in the earth to CAN-C-Mid.
-
 -
 Diagnosis Item 12*2
Diagnose shorts between CAN_H and L lines (CAN-C-Mid).


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 ETACS-ECU.


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 gateway-ECU. <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 15
Diagnose when the M.U.T.-III cannot receive the data sent by SRS-ECU.


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 steering wheel sensor. <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 clearance warning control unit. <Vehicles with ultrasonic misacceleration mitigation system/corner sensor system or reversing sensor system>


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 electric parking brake ECU. <Vehicles with electric parking brake>


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 19
Diagnose the lines between the joint connectors (CAN4 and CAN3). <RHD>


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 20
Diagnose when the M.U.T.-III cannot receive the data sent by 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC>. <4WD>


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 FCM/LDW/AHB-ECU. <Vehicles with FCM>


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 22
Diagnose the lines between the joint connectors (CAN3 and CAN1).


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 23
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 24
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 25
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 26
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 27
Diagnose the lines between the joint connectors (CAN1 and CAN2). <Vehicles with ACC>


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 28
Diagnose when the M.U.T.-III cannot receive the data sent by ACC-ECU. <Vehicles with ACC>


CAN-C: Failure in red displayed area is estimated.
 Diagnosis Item 29
Diagnose when the M.U.T.-III cannot receive the data sent by engine-ECU.


CAN-C*3: Failure in red displayed area is estimated.
 Diagnosis Item 30
Diagnose when the M.U.T.-III cannot receive the data sent by BSW-ECU. <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>


CAN-C-Mid: Failure in red displayed area is estimated.
 Diagnosis Item 31
Diagnose when the M.U.T.-III cannot receive the data sent by OSS-ECU. <Vehicles with KOS>


CAN-C-Mid: Failure in red displayed area is estimated.
 Diagnosis Item 32
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 33
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 34
Diagnose when the M.U.T.-III cannot receive the data sent by display audio <Vehicles with display audio>.


CAN-C-Mid: Failure in red displayed area is estimated.
 Diagnosis Item 35
Diagnose when the M.U.T.-III cannot receive the data sent by 1CD audio. <Vehicles with 1CD audio>


CAN-C-Mid: Failure in red displayed area is estimated.
 Diagnosis Item 36
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 37
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 38
Diagnose when the M.U.T.-III cannot receive the data sent by camera-ECU. <Vehicles with multi around monitor>


CAN-C-Mid: Failure in red displayed area is estimated.
 Diagnosis Item 39
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)".
  • *3: GW-CAN-C, which the BSW-ECU is connected to, is displayed as "CAN-C."

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