Mitsubishi Galant 9G. Manual - part 1230

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-24

NOTE: If the screen other than above is displayed, 
troubles are present at two or more spots. In this 
case, diagnose CAN bus lines by referring to the 
trouble spot pinpoint procedures.

NOTE: If a trouble cannot be solved after performing 
the diagnosis other than item 15, diagnose CAN bus 
line thoroughly.

<Comment>
Harness disconnection or loose connection in red 
displayed area is 
estimated.

Diagnostic Item 22
Diagnose the lines between CAN main 
bus line and the A/C-ECU.

P.54C-587

<Comment>
Harness disconnection or loose connection in red 
displayed area is 
estimated.

Diagnostic Item 23
Diagnose the lines between CAN main 
bus line and the SRS-ECU.

P.54C-594

<Comment>
Harness disconnection or loose connection in red 
displayed area is 
estimated.

Diagnostic Item 24
Diagnose the lines between CAN main 
bus line and the combination meter.

P.54C-602

MUT-III SCREEN

DIAGNOSIS DETAILS

REFERENCE 
PAGE

AC305791

: Red section on screen

AJ

MUT

ETACS

-ECU

AC-ECU

SRS-ECU

ABS-ECU

J/C

METER

-ECU

PCM

AC305791

: Red section on screen

AK

MUT

ETACS

-ECU

AC-ECU

SRS-ECU

ABS-ECU

J/C

METER

-ECU

PCM

AC305791

: Red section on screen

AL

MUT

ETACS

-ECU

AC-ECU

SRS-ECU

ABS-ECU

J/C

METER

-ECU

PCM

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-25

Vehicles with ABS and vehicles with multi-center display (middle-grade type)

MUT-III SCREEN

DIAGNOSIS DETAILS

REFERENCE 
PAGE

<Comment>
Short circuit to battery in red displayed area is 
estimated.

Diagnostic Item 3
Diagnose shorts in the power supply to 
CAN bus line <Vehicles with ABS and 
vehicles with multi-center display 
(middle-grade type)>

P.54C-119

<Comment>
Grounding in red displayed area is 
estimated.

Diagnostic Item 6
Diagnose shorts in the ground to CAN 
bus line <Vehicles with ABS and 
vehicles with multi-center display 
(middle-grade type)>

P.54C-255

<Comment>
Short circuit between CAN_H and CAN_L in red 
displayed area is 
estimated.

Diagnostic Item 9
Diagnose shorts between CAN_L and H 
lines <Vehicles with ABS and vehicles 
with multi-center display (middle-grade 
type)>

P.54C-360

AC305792

ETACS

-ECU

AC-ECU

: Red section on screen

PCM

SRS-ECU

METER

-ECU

AB

MUT

J/C

C.DISPLAY

ABS-ECU

AC305792

ETACS

-ECU

AC-ECU

: Red section on screen

PCM

SRS-ECU

METER

-ECU

AB

MUT

J/C

C.DISPLAY

ABS-ECU

AC305792

ETACS

-ECU

AC-ECU

: Red section on screen

PCM

SRS-ECU

METER

-ECU

AB

MUT

J/C

C.DISPLAY

ABS-ECU

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-26

<Comment>
Disconnection in red displayed area is 
estimated.

Diagnostic Item 11
Diagnose terminator resistors at both 
ends <Vehicles with ABS>

P.54C-407

MUT-III SCREEN

DIAGNOSIS DETAILS

REFERENCE 
PAGE

AC305792

: Red section on screen

PCM

METER

-ECU

AC

MUT

J/C

ABS-ECU

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-27

<Comment>
Malfunction of terminating resistance is 
estimated.

Diagnostic Item 13
Diagnose a terminator resistor at either 
end <Vehicles with ABS>

P.54C-441

<Comment>
Disconnection, loose connection or terminating 
resistance in red displayed area is 
estimated.

<Comment>
Disconnection, loose connection or terminating 
resistance in red displayed area is 
estimated.

MUT-III SCREEN

DIAGNOSIS DETAILS

REFERENCE 
PAGE

AC305792

: Red section on screen

PCM

METER

-ECU

AD

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

MUT

J/C

ABS-ECU

AC305792

: Red section on screen

PCM

METER

-ECU

AE

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

MUT

J/C

ABS-ECU

AC305792

: Red section on screen

PCM

METER

-ECU

AF

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

MUT

J/C

ABS-ECU