Mitsubishi L200. Manual — part 824

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-55

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

AC209364UE

Harness side: C-119

Test
harness

(3) Resistance between C-119 joint connector

(CAN1) terminal No.5 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UF

Test
harness

Harness side: C-119

(4) Resistance between C-119 joint connector

(CAN1) terminal No.16 (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 16.

NO :

<Less than 1 k

Ω > 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-56

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

illustration?
YES :

Check 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.
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

AC209364UG

Harness side: C-119

Test
harness

(3) Resistance between C-119 joint connector

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-57

(CAN1) terminal No.3 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UH

Test harness

Harness side: C-119

(4) Resistance between C-119 joint connector

(CAN1) terminal No.14 (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 18.

NO :

<Less than 1 k

Ω > Go to Step 17.

STEP 17. M.U.T.-III CAN bus diagnostics [steering
wheel sensor connector disconnected]

AC903858

Connector: C-308 <LHD>

AK

AC903869

Connector: C-308 <RHD>

AK

(1) Disconnect steering wheel sensor connector C-

308, 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 steering wheel
sensor connector.

NO :

Check the steering wheel sensor connector,
and repair if necessary. If the steering wheel
sensor connector is in good condition, repair
the steering wheel sensor power supply
circuit.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-58

STEP 18. Check the CAN line between joint
connector (CAN1) and the G and yaw rate sensor.
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

AC209364UI

Harness side: C-119

Test harness

(3) Resistance between C-119 joint connector

(CAN1) terminal No.4 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UJ

Test harness

Harness side: C-119

(4) Resistance between C-119 joint connector

(CAN1) terminal No.15 (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 <vehicles without A/C> :

<1 k

Ω or more> Go

to Step 22.

YES <vehicles with A/C> :

<1 k

Ω or more> Go to

Step 20.

NO :

<Less than 1 k

Ω > Go to Step 19.

STEP 19. M.U.T.-III CAN bus diagnostics [G and
yaw rate sensor connector disconnected]

AC903853

BN

Connector: C-144 <LHD>

C-144 (GR)

Harness side

AC903865 AV

Connector: C-144 <RHD>

C-144 (GR)

Harness side

(1) Disconnect G and yaw rate sensor connector C-