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