Mitsubishi 380. Manual — part 719

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-287

STEP 11. Check the CAN bus lines (communication line
only) between ABS-ECU and the A/T-ECU. Measure the
resistance at ABS-ECU connector A-02 and A/T-ECU
connector B-19.

NOTE: when diagnosing CAN-BUS on vehicles with
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and
ENGINE-ECU only.

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

.

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-288

(1) Disconnect ABS-ECU connector A-02 and A/T-ECU

connector B-19, and measure the resistance between each
wiring harness side connector.

(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:

16DB480A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-289

(4) Measure the resistance between ABS-ECU connector

terminal 15 and A/T-ECU B-19 connector terminal 14.

OK: 2 ohms or less

(5) Measure the resistance between ABS-ECU connector

terminal 26 and A/T-ECU B-19 connector terminal 13.

OK: 2 ohms or less

NOTE: when diagnosing CAN-BUS on vehicles with
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and
ENGINE-ECU only.

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 12.

NO : If either of the resistances measures more than 2

ohms or all the resistances measure more than 2
ohms, repair the wiring harness between the
ABS-ECU connector and the A/T-ECU connector, and
then go to Step 8.

STEP 12. Check A/T-ECU connector B-19 and ENGINE-ECU
connector B-21 for loose, corroded or damaged terminals,
or terminals pushed back in the connector.

NOTE: when diagnosing CAN-BUS on vehicles with
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and
ENGINE-ECU only.

16DB507A

HARNESS SIDE: A-02

HARNESS SIDE: B-19

TEST
HARNESS

TEST
HARNESS

16DB508A

HARNESS SIDE: A-02

HARNESS SIDE: B-19

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-290

CAUTION

The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to

P.54C-4

.

Q: Are A/T-ECU connector B-19 and ENGINE-ECU

connector B-21 in good condition?
YES : Go to Step 13.
NO : Repair the damaged parts. Then go to Step 8.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

16DB480A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT