Mitsubishi L200. Manual — part 825

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-59

144, and diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?
YES :

Repair the wiring harness between joint

connector (CAN1) and the G and yaw rate
sensor connector.

NO :

Check the G and yaw rate sensor
connector, and repair if necessary. If the G
and yaw rate sensor connector is in good
condition, repair the G and yaw rate sensor
power supply circuit.

STEP 20. Check the CAN line between joint
connector (CAN1) and the A/C-ECU. 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 joint connector (CAN1), and measure

at the wiring harness side.

CAUTION

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

P.54C-7

.

(2) Ensure that the negative battery terminal is

disconnected.

AC209364

AC209364UK

Harness side: C-119

Test harness

(3) Resistance between C-119 joint connector

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-60

(CAN1) terminal No.6 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UL

Test harness

Harness side: C-119

(4) Resistance between C-119 joint connector

(CAN1) terminal No.17 (CAN_L) and body earth

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> Go to Step 22.

NO :

<Less than 1 k

Ω > Go to Step 21.

STEP 21. M.U.T.-III CAN bus diagnostics [A/C-
ECU connector disconnected]

AC903856BS

Connector: C-43 <LHD>

Harness side

AC903868

CN

Connector: C-43 <RHD>

Harness side

(1) Disconnect A/C-ECU connector C-43, and

diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?
YES :

Repair the wiring harness between joint

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

NO :

Check the A/C-ECU connector, and repair if
necessary. If the A/C-ECU connector is in
good condition, repair the A/C-ECU power
supply circuit. (Refer to GROUP 55B .)

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-61

STEP 22. Check the CAN line between joint
connector (CAN1) and the diagnosis connector.
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 joint connector (CAN1), and measure

at the wiring harness side.

CAUTION

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

P.54C-7

.

(2) Ensure that the negative battery terminal is

disconnected.

AC209364

AC209364UM

Harness side: C-119

Test harness

(3) Resistance between C-119 joint connector

(CAN1) terminal No.10 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UN

Test harness

Harness side: C-119

(4) Resistance between C-119 joint connector

(CAN1) terminal No.21 (CAN_L) and body earth

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 intermediate

connector C-53 <LHD> or C-35 <RHD>, or
the wiring harness between joint connector
(CAN1) and the intermediate connector C-
53 <LHD> or C-35 <RHD>.

NO :

<Less than 1 k

Ω > Repair the diagnosis

connector, or the wiring harness between
joint connector (CAN1) and the diagnosis
connector.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-62

STEP 23. M.U.T.-III CAN bus diagnostics [engine-
ECU connector disconnected]

AC903853

BV

Connector: C-103 <LHD>

C-103 (B)

Harness side

AC903865 AY

Connector: C-103 <RHD>

Harness side

C-103 (B)

(1) Disconnect engine-ECU connector C-103 and

diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?
YES :

Go to Step 25.

NO :

Check the engine-ECU connector, and
repair if necessary. If the engine-ECU
connector is in good condition, go to Step
24.

STEP 24. M.U.T.-III CAN bus diagnostics (retest
the system)
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Check the engine-ECU connector, and
repair if necessary. If the engine-ECU
connector is in good condition, replace the
engine-ECU.

STEP 25. M.U.T.-III CAN bus diagnostics [ETACS-
ECU connector disconnected]

AC509934

Connector: C-219 <LHD>

AD

C-219 (GR)

Harness side

Junction block

AC509943

Connector: C-219 <RHD>

AB

C-219 (GR)

Harness side

Junction block
(Rear view)

(1) Disconnect ETACS-ECU connector C-219, and

diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?