Mitsubishi 380. Manual - part 684

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-146

STEP 11. Check the CAN_H line (communication line only)
between joint connector (3) and ETACS-ECU connector for
short to ground. Measure the resistance at joint connector
(3) C-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 joint connector (3) C-02 and ETACS-ECU

connector C-218, and measure the resistance at the wiring
harness side of joint connector (3) C-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 joint connector (3)

terminal 5 and body ground.

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, diagnose

CAN bus lines thoroughly by referring to

P.54C-323

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between joint connector (3) and the
ETACS-ECU connector.

16DB408A

CONNECTOR: C-02

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

AC209364

11
22

AC209364

AC209364HX

HARNESS SIDE: C-02

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-147

STEP 12. Check the CAN_H line (communication line
including the A/C-ECU) between joint connector (3) and
the A/C-ECU connector for short to ground. Measure the
resistance at joint connector (3) C-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 joint connector (3) C-02, and measure the

resistance at the wiring harness side of joint connector (3)
C-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 joint connector (3)

terminal 6 and body ground.

OK: 1 k

Ω or more

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, go to Step

15 .

NO : If the resistance measures less than 1 k

Ω, go to Step

13.

16DB408A

CONNECTOR: C-02

AC209364

11
22

AC209364

AC209364JH

HARNESS SIDE: C-02

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-148

STEP 13. Check A/C-ECU connector C-15 automatic air
conditioning system for loose, corroded or damaged
terminals, or terminals pushed back in the connector.

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: Is A/C-ECU connector C-15 automatic air conditioning

system in good condition?
YES : Go to Step 14.
NO : Repair the damaged parts.

16DB477A

C-15 HARNESS SIDE

CONNECTOR: C-15

C-15 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-149

STEP 14. Check the CAN_H line (communication line only)
between joint connector (3) and A/C-ECU connector for
short to ground. Measure the resistance at joint connector
(3) C-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 joint connector (3) C-02 and A/C-ECU

connector C-15 automatic air conditioning system, and
measure the resistance at the wiring harness side of joint
connector (3) C-02.

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

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-4