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.