Mitsubishi 380. Manual — part 736

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-355

STEP 24. Check the CAN bus lines inside the ABS-ECU.
Measure the resistance at ABS-ECU connector A-02.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-4

.

(1) Disconnect ABS-ECU connector A-02, and measure the

resistance at the component side of ABS-ECU connector
A-02.

(2) Turn the ignition switch to the "LOCK" (OFF) position.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-4

.

(3) Disconnect the negative battery terminal.

(4) Measure the resistance between ABS-ECU connector

terminals 14 and 15.

OK: 2 ohms or less

(5) Measure the resistance between ABS-ECU connector

terminals 25 and 26.

OK: 2 ohms or less

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to

P.54C-5

.

Q: Do all the resistances measure 2 ohms or less?

YES : If all the resistances measure 2 ohms or less, go to

Step 25 or power supply to the ENGINE-ECU may be
suspected. Diagnose the engine. Refer to GROUP

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

16DB515A

COMPONENT SIDE: A-02

TEST
HARNESS

TEST
HARNESS

16DB516A

COMPONENT SIDE: A-02

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-356

13A, MPI diagnosis

P.13A-571

<3.8L engine>.

NO : If either of the resistances measures more than 2

ohms or all the resistances measure more than 2
ohms, replace the ABS-ECU.

STEP 25. Using diagnostic tool MB991958, diagnose the
CAN bus line (Disconnect ABS-ECU connector A-02, and
check the ABS-ECU system).
(1) Disconnect ABS-ECU connector A-02.
(2) Turn the ignition switch to the "ON" position.

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-357

(3) Diagnose CAN bus lines, and check if the MUT-III screen is

as shown in the illustration.

NOTE: When diagnosing CAN-BUS on vehi-

cles with manual transmission (M/T), disregard
A/T-ECU and it’s wiring circuits and measure
between ABS-ECU and ENGINE-ECU only.

NOTE: When diagnosing CAN-BUS on vehicles
not equipped with a multi-centre display, disre-
gard the multi-centre display and it’s wiring cir-
cuits.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Check ABS-ECU connector A-02.

Q: Does the MUT-III screen correspond to the illustration?

YES : If the MUT-III screen corresponds to the illustration,

go to Step 26 .

NO : If the MUT-III screen does not correspond to the

illustration, refer to diagnostics item 5: Check the
CAN_L and H lines for a short circuit (Refer to

P.54C-239

).

16DB593A

: Red section on screen

ENGINE

ECU

METER

-ECU

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

MUT

J/C

ABS-ECU

A/T-ECU

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-358

STEP 26. Check the CAN bus lines between intermediate
connector C-29 and the ABS-ECU. Measure the resistance
between intermediate connector C-29 and ABS-ECU
connector A-02.

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-4

.

(1) Disconnect intermediate connector C-29 and ABS-ECU

connector A-02, and measure the resistance between the
wiring harness side connector of ABS-ECU connector A-02
and the male side connector of intermediate connector
C-29 (at front wiring harness side).

(2) Turn the ignition switch to the "LOCK" (OFF) position.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-4

.

(3) Disconnect the negative battery terminal.

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

52DB014A

CONNECTOR: C-29