Mitsubishi L200. Manual — part 835

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-99

TROUBLE JUDGEMENT CONDITIONS
M.U.T.-III judges the trouble when the periodically
sent data from ABS-ECU <vehicles with ABS> or
ASTC-ECU <vehicles with ASTC> cannot be
received.

PROBABLE CAUSES

• Damaged harness wires and connectors

• Power supply circuit malfunction of the ABS-ECU

<vehicles with ABS> or ASTC-ECU <vehicles
with ASTC>

• Malfunction of the ABS-ECU <vehicles with

ABS> or ASTC-ECU <vehicles with ASTC>

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-100

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-13 intermediate
connector, C-119 joint connector (CAN1) and A-
01 ABS-ECU <vehicles with ABS> or A-48 ASTC-
ECU <vehicles with ASTC> connector

AC903990

Connectors: A-01, A-48

AB

A-01 (GR)
A-48 (B)

Harness side

A-01

Harness side

A-48

AC903853

BO

C-13

Connectors: C-13, C-119 <LHD>

C-119 (GR)

C-13

C-119

AC903868

CO

C-13

Connectors: C-13, C-119 <RHD>

C-119 (GR)

C-13

C-119

CAUTION

The strand end of the twist wire should be within
10 cm from the connector. For details refer to

P.54C-7

.

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC

Short pin

When checking the joint connector, ensure that its
wiring harness side and its short pins are not dam-
aged.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the defective connector. Replace the
joint connector as necessary.

STEP 2. Resistance measurement at C-119 joint
connector (CAN1) and C-13 intermediate
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

BO

C-13

Connectors: C-13, C-119 <LHD>

C-119 (GR)

C-13

C-119

AC903868

CO

C-13

Connectors: C-13, C-119 <RHD>

C-119 (GR)

C-13

C-119

(1) Disconnect the joint connector (CAN1) and the

intermediate connector, and measure at the
wiring harness side.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-101

(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

Harness side: C-13

Harness side: C-119

LW

Test
harness

Test
harness

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

terminal No.5 and C-13 intermediate connector

terminal No.14 <LHD>

OK: Continuity (2

Ω or less)

AC204740

Harness side: C-13

Harness side: C-119

NC

Test
harness

Test
harness

(5) Continuity between C-119 joint connector (CAN1)

terminal No.5 and C-13 intermediate connector
terminal No.13 <RHD>

OK: Continuity (2

Ω or less)

AC204740

AC204740

AC204740

Harness side: C-13

AC204740

AC204740

Harness side: C-119

NE

Test
harness

Test
harness

(6) Continuity between C-119 joint connector (CAN1)

terminal No.16 and C-13 intermediate connector

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-102

terminal No.15 <LHD>

OK: Continuity (2

Ω or less)

AC204740

AC204740

AC204740

Harness side: C-13

AC204740

AC204740

Harness side: C-119

ND

Test
harness

Test
harness

(7) Continuity between C-119 joint connector (CAN1)

terminal No.16 and C-13 intermediate connector
terminal No.12 <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>

Go to Step 3 .

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN1) and
intermediate connector (C-13).