CAN BUS DIAGNOSTICS TABLE



caution During diagnosis, a diagnosis code associated with another system may be stored when the electric motor switch is turned on with connector(s) disconnected. After completing the repair, confirm all systems for diagnosis code(s). If diagnosis code(s) are stored, 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
<LHD>

Failure in red displayed area is estimated.
Diagnosis Item 1
Communication with no ECUs is possible (CAN-C).

<RHD>

-
-
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>

<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>

<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>

<RHD>

CAN-C: Failure in red displayed area is estimated.
Diagnosis Item 12
Diagnose the lines between the joint connectors (CAN4 and CAN3). <RHD>



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 LDW-ECU <Vehicles with LDW>.

<LHD>

CAN-C: Failure in red displayed area is estimated.
Diagnosis Item 14
Diagnose the lines between the joint connectors (CAN3 and CAN1).

<RHD>



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 ASC-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 EPS-ECU.



CAN-C: Failure in red displayed area is estimated.
Diagnosis Item 17
Diagnose the lines between the joint connectors (CAN1 and CAN2).



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 ACC/FCM-ECU <Vehicles with ACC>.



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 engine-ECU.



CAN-C-Mid: Failure in red displayed area is estimated.
Diagnosis Item 20
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 21
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 22
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 23
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 24
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 25
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 26
Diagnose when the M.U.T.-III cannot receive the data sent by electric tailgate control unit <vehicles with electric tailgate>.



CAN-C: Failure in red displayed area is estimated.
Diagnosis Item 27
Diagnose when the M.U.T.-III cannot receive the data sent by combination meter.

<LHD>

CAN-C: Failure in red displayed area is estimated.
Diagnosis Item 28
Diagnose the lines between the joint connectors (CAN4 and CAN3). <LHD>

<LHD>

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 PHEV-ECU.

<RHD>



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 EV remote-ECU.<Vehicles with MITSUBISHI remote control>



Failure in red displayed area is estimated.
Diagnosis Item 31
Communication with no ECUs is possible (EV-CAN).

-
-
Diagnosis Item 32*3
Diagnose shorts in the power supply to EV-CAN.

-
-
Diagnosis Item 33*3
Diagnose shorts in the earth to EV-CAN.

-
-
Diagnosis Item 34*3
Diagnose shorts between CAN_H and L lines (EV-CAN).



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 35
Diagnose when the M.U.T.-III cannot receive the data sent by front power drive unit.



EV-CAN: 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 compressor.



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 37
Diagnose the lines between the joint connectors (CAN2 and CAN1).



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 38
Diagnose when the M.U.T.-III cannot receive the data sent by electrical parking driver unit.



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 39
Diagnose the lines between the joint connectors (CAN1 and CAN6).



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 40
Diagnose when the M.U.T.-III cannot receive the data sent by rear electric motor control unit.



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 41
Diagnose when the M.U.T.-III cannot receive the data sent by on board charger/DC-DC converter.



EV-CAN: Failure in red displayed area is estimated.
Diagnosis Item 42
Diagnose when the M.U.T.-III cannot receive the data sent by battery management unit.

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: diagnosis items 32, 33 and 34 should be checked AFTER the cause of the fault is determined in diagnosis item 31 "Communication with no ECUs is possible (EV-CAN)".