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 28 .

    • 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



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 AFS>


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 AWC-ECU <RALLIART>



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 ABS-ECU <vehicles without ASC> or ASC-ECU <vehicles with ASC>



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 AFS-ECU <vehicles with AFS>


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 electric power steering-ECU <1500>


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 A/T-ECU <1500> or CVT-ECU <1800, 2000-PETROL>


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 shift lever <RALLIART>


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 transmission assembly (TC-SST-ECU) <RALLIART>



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-C: Disconnection in red displayed area is estimated.
 Diagnosis Item 17
Diagnose the lines between joint connector (CAN3) and joint connector (CAN4) <RALLIART>



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 KOS-ECU <vehicles with KOS>
Diagnosis Item 19
Diagnose when the M.U.T.-III cannot receive the data sent by WCM <vehicles with WCM>



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 SRS-ECU



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 A/C-ECU <vehicles with A/C> or heater control unit <vehicles without A/C>



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 CAN box unit <vehicles with MMCS>



CAN-B: Disconnection in red displayed area is estimated.
 Diagnosis Item 23
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 24
Diagnose when the M.U.T.-III cannot receive the data sent by radio and CD player <vehicles with radio and CD player >



CAN-B: Disconnection in red displayed area is estimated.
 Diagnosis Item 25
Diagnose when the M.U.T.-III cannot receive the data sent by hands free-ECU <vehicles with hands free cellular phone system>



CAN-B: A failure in the red section, or a bus-off failure is present in the gateway ECU.
 Diagnosis Item 26
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 27
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 28
Short to power supply or earth, open circuit or line-to-line short in the CAN-B bus lines