Mitsubishi L200. Manual - part 841

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-123

terminal No.6

OK: Continuity (2 

Ω or less) 

AC204740

Harness side: C-43

Harness side: C-119

AC204740

AC204740

AC204740

AC204740IC

Test harness

Test 
harness

(5) Continuity between C-119 joint connector (CAN1) 

terminal No.17 and C-43 A/C-ECU connector 
terminal No.7

OK: Continuity (2 

Ω or less) 

CAUTION

Strictly observe the specified wiring harness 
repair procedure. For details refer to 

P.54C-7

.

Q: Is the check result normal?

YES : 

<All the resistances measure 2 

Ω or less> 

Power supply to the A/C-ECU may be 
suspected. Diagnose the A/C-ECU. Refer to 
.

NO  : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

between joint connector (CAN1) and the A/
C-ECU connector.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-124

Diagnosis Item 11: Diagnose the lines between the joint connectors (CAN1 and CAN2)

CAUTION

When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water 
pipe. If you fail to do, a component connected to the CAN bus line may be broken.

Wire colour code 
B : Black     LG : Light green     G : Green     L : Blue     W : White 
Y : Yellow     SB : Sky blue     BR : Brown     O : Orange     GR : Grey 
R : Red     P : Pink     V : Violet     PU : Purple     SI : Silver

A/T-ECU

DIAGNOSIS 
CONNECTOR

ENGINE-ECU

STEERING 
WHEEL 
SENSOR

G AND 
YAW RATE 
SENSOR

A/C-ECU

ABS-ECU

ASTC-ECU

ETACS-ECU

RV METER

NOTE

:VEHICLES WITH ABS
:VEHICLES WITH ASTC
:VEHICLES WITH RV METER
:VEHICLES WITH AUTOMATIC-A/C
:LHD
:RHD
:A/T

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-125

FUNCTION
The diagnostic result demonstrates that "diagnose 
the lines between the joint connectors (CAN1 and 
CAN2)" when the M.U.T.-III checks the periodically 
sent data from each ECU.

TROUBLE JUDGEMENT CONDITIONS
M.U.T.-III judges the trouble when the periodically 
sent data from engine-ECU and the A/T-ECU <A/T> 
cannot be received.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-126

PROBABLE CAUSE
Damaged harness wires and connectors