Mitsubishi L200. Manual - part 844

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-135

STEP 2. Resistance measurement at C-01 joint 
connector (CAN2) and C-20 A/T-ECU connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-7

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-7

.

AC903853

BL

Connector: C-01 <LHD>

C-01 (L)

AC903865AU

Connector: C-01 <RHD>

C-01 (L)

AC903856BR

Connector: C-20 <LHD>

Harness side

AC903868

CL

Connector: C-20 <RHD>

Harness side

(1) Disconnect joint connector (CAN2) and the A/T-

ECU connector, and measure at the wiring 
harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54C-7

.

(3) Ensure that the negative battery terminal is 

disconnected.

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

Harness side: C-01

Harness side: C-20

IN

Test harness

Test 
harness

(4) Continuity between C-01 joint connector (CAN2) 

terminal No.10 and C-20 A/T-ECU connector 

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-136

terminal No.53 <LHD>

OK: Continuity (2 

Ω or less) 

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

Harness side: C-01

Harness side: C-20

MX

Test harness

Test 
harness

(5) Continuity between C-01 joint connector (CAN2) 

terminal No.9 and C-20 A/T-ECU connector 
terminal No.53 <RHD>

OK: Continuity (2 

Ω or less) 

AC204740

AC204740

AC204740

AC204740

AC204740

Harness side: C-01

Harness side: C-20

AC204740

AC204740

AC204740IP

Test harness

Test 
harness

(6) Continuity between C-01 joint connector (CAN2) 

terminal No.21 and C-20 A/T-ECU connector 
terminal No.54 <LHD>

OK: Continuity (2 

Ω or less) 

AC204740

AC204740

AC204740

AC204740

AC204740

Harness side: C-01

Harness side: C-20

AC204740

AC204740

AC204740MY

Test harness

Test 
harness

(7) Continuity between C-01 joint connector (CAN2) 

terminal No.20 and C-20 A/T-ECU connector 
terminal No.54 <RHD>

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/T-ECU may be 
suspected. Diagnose the A/T. Refer to .

NO  : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

between joint connector (CAN2) and the A/
T-ECU connector.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-137

Diagnosis Item 13: Diagnose when the M.U.T.-III cannot receive the data sent by engine-ECU.

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-138

FUNCTION
The diagnostic result demonstrates that "the M.U.T.-
III cannot receive the sent data from the engine-
ECU" 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 cannot be received.