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CAN BUS DIAGNOSTICS TABLE
 
 
cautionDuring diagnosis, a DTC 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 DTC(s). If DTC(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 diagnostic procedure below only when the CAN bus line is defective. Also, see the CAN Bus Diagnostic Procedure for how to diagnose CAN bus lines .
note
  • The "X" in the CAN bus diagnostics table indicates the system with diagnostic results of "NC" or "communication error."
  • Start the CAN bus diagnostics table check with CAN-C.
  • Since the BSW-ECU (master) stores the CAN bus line abnormality (DTC C2332) from the BSW-ECU (master) to the BSW-ECU (slave), it is excluded from the target of the CAN bus diagnostic of GROUP 54C. If "NC" is displayed only in the "BSW (SUB)" item on the scan tool (M.U.T.-IIISE) screen, read the DTC of the BSW-ECU (master) and perform the corresponding troubleshooting.
 
 
CAN-C
ECUETACSSteering Angle SensorSRS-AIR BAGGatewayEPBOCMFCM/LDW/AHBAWCELC-AT/CVT/TC-SSTABS/ASC/ASTC/WSSECPS/4WSACC/FCMMFIDiagnostic contents and reference pages
All diagnostic reading resultsXXXXXXXXXXXXXDiagnostic Item 1
Communication with no ECUs is possible (CAN-C).
Refer to .
Diagnostic Item 2*
Diagnose shorts in the power supply to CAN-C.
Refer to .
Diagnostic Item 3*
Diagnose shorts in the ground to CAN-C.
Refer to .
Diagnostic Item 4*
Diagnose shorts between CAN_H and L lines (CAN-C).
Refer to .
All diagnostic reading resultsX------------Diagnostic Item 5
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by ETACS-ECU.
Refer to .
-X-----------Diagnostic Item 6
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by steering wheel sensor.
Refer to .
--X----------Diagnostic Item 7
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by SRS-ECU.
Refer to .
All diagnostic reading results---X---------Diagnostic Item 8
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by gateway-ECU. <Vehicles with blind spot warning [BSW] (with Lane Change Assist) system>
Refer to .
----X--------Diagnostic Item 9
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by electric parking brake ECU. <Vehicles with electric parking brake>
Refer to .
All diagnostic reading results-----X-------Diagnostic Item 10
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by occupant classification-ECU.
Refer to .
------XXXXXXXDiagnostic Item 11
Diagnose the lines between the joint connectors (CAN1 and CAN2).
Refer to .
------X------Diagnostic Item 12
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by FCM/LDW/AHB-ECU.
Refer to .
All diagnostic reading results-------X-----Diagnostic Item 13
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by AWC-ECU. <AWD>
Refer to .
--------XXXXXDiagnostic Item 14
Diagnose the lines between the joint connectors (CAN2 and CAN3).
Refer to .
--------X----Diagnostic Item 15
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by TCM.
Refer to .
All diagnostic reading results---------X---Diagnostic Item 16
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by ASC-ECU.
Refer to .
----------X--Diagnostic Item 17
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by EPS-ECU.
Refer to .
-----------XXDiagnostic Item 18
Diagnose the lines between the joint connectors (CAN3 and CAN4).
Refer to .
All diagnostic reading results-----------X-Diagnostic Item 19
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by ACC/FCM-ECU. <Vehicles with ACC>
Refer to .
------------XDiagnostic Item 20
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by ECM.
Refer to .
note*: Diagnostic items 2, 3 and 4 should be checked after the cause of the fault is determined in diagnostic item 1 "Communication with no ECUs is possible".
 
 
CAN-C-Mid
cautionIf "NC" or "Communication error" is displayed in the "ETACS" item on the scan tool (M.U.T.-IIISE) screen, refer to CAN-C table and perform the corresponding troubleshooting.
ECUF.A.S.T./OSS/IMMO/KeylessMulti Around MonitorHUDAir ConditioningAUDIOMeterTCUDiagnostic contents and reference pages
All diagnostic reading resultsXXXXXXXDiagnostic Item 21
Communication with no ECUs is possible (CAN-C-Mid).
Refer to .
Diagnostic Item 22*
Diagnose shorts in the power supply to CAN-C-Mid.
Refer to .
Diagnostic Item 23*
Diagnose shorts in the ground to CAN-C-Mid.
Refer to .
Diagnostic Item 24*
Diagnose shorts between CAN_H and L lines (CAN-C-Mid).
Refer to .
X------Diagnostic Item 25
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by KOS&OSS-ECU. <Vehicles with KOS>
Refer to .
-X-----Diagnostic Item 26
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by Camera-ECU. <Vehicles with multi around monitor>.
Refer to .
All diagnostic reading results--X----Diagnostic Item 27
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by HUD. <Vehicles with HUD>
Refer to .
---X---Diagnostic Item 28
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by A/C controller assembly.
Refer to .
----X--Diagnostic Item 29
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by multivision display. <Vehicles with smartphone link display audio>
Refer to .
-----X-Diagnostic Item 30
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by combination meter.
Refer to .
------XDiagnostic Item 31
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by telematics control unit (TCU). <Vehicles with TCU>
Refer to .
note*: Diagnostic items 22, 23 and 24 should be checked after the cause of the fault is determined in diagnostic item 21 "Communication with no ECUs is possible (CAN-C-Mid)".
 
 
GW-CAN-C
caution
  • If "NC" or "Communication error" is displayed in the "Gateway" item on the scan tool (M.U.T.-IIISE) screen, refer to CAN-C table and perform the corresponding troubleshooting.
  • "BSW(SUB)" is excluded from the target of the CAN bus diagnosis of GROUP 54C. If "NC" is displayed only in the "BSW (SUB)" item on the scan tool (M.U.T.-IIISE) screen, read the diagnostic trouble code of the BSW-ECU (master) and perform the corresponding troubleshooting.
ECUBSWDiagnostic contents and reference pages
All diagnostic reading resultsXDiagnostic Item 32
Diagnose when the scan tool (M.U.T.-IIISE) cannot receive the data sent by BSW-ECU (master). <Vehicles with blind spot warning [BSW] (with Lane Change Assist) system>
Refer to .