Mitsubishi L200. Manual — part 818

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-31

STEP 9. M.U.T.-III CAN bus diagnostics [RV meter
connector disconnected]

AC903856

Connector: C-171 <LHD>

AY

Harness side

C-171 (GR)

AC903868

Connector: C-171 <RHD>

BQ

Harness side

C-171 (GR)

(1) Disconnect RV meter connector C-171, 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 RV meter
connector.

NO :

Check the RV meter connector, and repair if
necessary. If the RV meter connector is in
good condition, repair the RV meter power
supply circuit. (Refer to GROUP 54A

− RV

meter .)

STEP 10. Check the CAN line between joint
connector (CAN1) and the ABS-ECU. Voltage
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.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

AC209365

AC209365

AC209365

AC209365

AC209365RS

Harness side: C-119

Test
harness

(3) Voltage between C-119 joint connector (CAN1)

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-32

terminal No.5 (CAN_H) and body earth

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test
harness

AC209365

AC209365

AC209365RT

Harness side: C-119

(4) Voltage between C-119 joint connector (CAN1)

terminal No.16 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

CAUTION

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

P.54C-7

.

Q: Is the check result normal?

YES <vehicles without A/C> :

<4.0 V or less> Go

to Step 22.

YES <vehicles with A/C> :

<4.0 V or less> Go to

Step 20.

NO :

<More than 4.0 V> Go to Step 11.

STEP 11. M.U.T.-III CAN bus diagnostics [ABS-
ECU connector disconnected]

AC903897

Connector: A-01

AN

A-01 (GR)

Harness side

(1) Disconnect ABS-ECU connector A-01, 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 :

Check the intermediate connector (C-13),

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

NO :

Check the ABS-ECU connector, and repair
if necessary. If the ABS-ECU connector is in
good condition, go to Step 12.

STEP 12. 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 ABS-ECU connector, and repair
if necessary. If the ABS-ECU connector is in
good condition, replace the hydraulic unit
assembly.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-33

STEP 13. Check the CAN line between joint
connector (CAN1) and the ASTC-ECU. Voltage
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.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

AC209365

AC209365

AC209365

AC209365

AC209365RS

Harness side: C-119

Test
harness

(3) Voltage between C-119 joint connector (CAN1)

terminal No.5 (CAN_H) and body earth

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test
harness

AC209365

AC209365

AC209365RT

Harness side: C-119

(4) Voltage between C-119 joint connector (CAN1)

terminal No.16 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

CAUTION

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

P.54C-7

.

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 16.

NO :

<More than 4.0 V> Go to Step 14.

STEP 14. M.U.T.-III CAN bus diagnostics [ASTC-
ECU connector disconnected]

AC903897

Connector: A-48

AO

A-48 (B)

Harness side

(1) Disconnect ASTC-ECU connector A-48, 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.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-34

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

illustration?
YES :

Check the intermediate connector (C-13),

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

NO :

Check the ASTC-ECU connector, and repair
if necessary. If the ASTC-ECU connector is
in good condition, go to Step 15.

STEP 15. 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 ASTC-ECU connector, and repair
if necessary. If the ASTC-ECU connector is
in good condition, replace the hydraulic unit
assembly.

STEP 16. Check the CAN line between joint
connector (CAN1) and the steering wheel sensor.
Voltage 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.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

AC209365

AC209365

AC209365

AC209365

AC209365RU

Harness side: C-119

Test
harness

(3) Voltage between C-119 joint connector (CAN1)