Mitsubishi L200. Manual — part 830

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-79

equipment side.

AC204738

AC204738

AC204738

AC204738

AC204738MO

Test
harness

Test
harness

Equipment side: C-43

(2) Resistance at C-43 A/C-ECU connector terminal

Nos.6 and 7

OK: 1 k

Ω or more

Q: Is the check result normal?

YES :

<1 k

Ω or more> Repair the wiring harness

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

NO :

<Less than 1 k

Ω> Check the A/C-ECU

connector, and repair if necessary. If the A/
C-ECU connector is in good condition,
replace the A/C-ECU.

STEP 23. Resistance measurement at C-119 joint
connector (CAN1).

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

BM

Connector: C-119 <LHD>

C-119 (GR)

AC903868

CM

Connector: C-119 <RHD>

C-119 (GR)

(1) Disconnect the joint connector (CAN1), 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.

AC204738

AC204738PI

Harness side: C-119

Test harness

Test harness

(4) Resistance between C-119 joint connector

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-80

(CAN1) terminal Nos.10 and 21

OK: 1 k

Ω or more

CAUTION

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

P.54C-7

.

Q: Is the check result normal?

YES :

<1 k

Ω or more> Repair the wiring harness

between joint connector (CAN1) and the
intermediate connector C-53.

NO :

<Less than 1 k

Ω> Check the diagnosis

connector, and repair if necessary. If the
diagnosis connector is in good condition,
repair the wiring harness between joint
connector (CAN1) and the diagnosis
connector.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-81

Diagnosis Item 4: Diagnose the terminator resistors

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-82

FUNCTION
The resistance in the communication errors condition
cannot be measured by the CAN bus diagnostics,
therefore, judge the terminator resistor only when
receiving the each ECU periodically sent data nor-

mally.