Mitsubishi Galant 9G. Manual — part 1319

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-380

STEP 23. Check the CAN_L and H lines (communication
lines including the multi-center display unit (middle-grade
type)) between joint connector (3) and the middle-grade
multi-center display for a short circuit. 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)

terminals 8 and 19.

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

27 .

NO : If the resistance measures less than 1 k

Ω, go to Step

24.

STEP 24. Check multi-center display unit (middle-grade
type) connector C-05 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 multi-center display unit (middle-grade type)

connector C-05 in good condition?
YES : Go to Step 25.
NO : Repair the damaged parts.

AC305231AP

CONNECTOR: C-02

AC209438

AC209438

TEST
HARNESS

AW

TEST
HARNESS

1110 9 8 7 6 5 4 3 2 1

22 21201918 1716 15 14 1312

HARNESS SIDE: C-02

AC305233 AF

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-381

STEP 25. Check the CAN_L and H lines (communication
lines only) between joint connector (3) and the multi-center
display unit (middle-grade type) for a short circuit.
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 multi-center display

unit (middle-grade type) connector C-05, 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)

terminals 8 and 19.

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, go to Step

26 .

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between joint connector (3) and
multi-center display unit (middle-grade type)
connector.

AC305231AP

CONNECTOR: C-02

AC305233 AF

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

AC209438

AC209438

TEST
HARNESS

AW

TEST
HARNESS

1110 9 8 7 6 5 4 3 2 1

22 21201918 1716 15 14 1312

HARNESS SIDE: C-02

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-382

STEP 26. Check the multi-center display unit
(middle-grade type) for short circuit. Measure the
resistance at multi-center display unit (middle-grade type)
connector C-05.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

(1) Disconnect multi-center display unit (middle-grade type)

connector C-05, and measure the resistance at the
component side of multi-center display unit (middle-grade
type) connector C-05.

(2) Measure the resistance between the multi-center display

unit (middle-grade type) connector terminals 12 and 13.

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, diagnose

CAN bus lines thoroughly by referring to

P.54C-520

.

NO : If the resistance measures lower than 1 k

Ω, replace

the multi-center display unit (middle-grade type).

STEP 27. Check data link connector C-125 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 data link connector C-125 in good condition?

YES : Go to Step 28.
NO : Repair the damaged parts.

AC305233 AF

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

AC209438

AC209438

COMPONENT SIDE: C-05

AZ

TEST
HARNESS

TEST
HARNESS

AC305231AR

CONNECTOR: C-125

C-125 (B)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-383

STEP 28. Check the CAN_L and H lines (communication
lines only) between joint connector (3) and the data link
connector for a short circuit. 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)

terminals 7 and 18.

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

29 .

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between joint connector (3) and the
data link connector.

AC305231AP

CONNECTOR: C-02

AC209438

1110 9 8 7 6 5 4 3 2 1

22 21201918 1716 15 14 1312

AC209438

AC209438

TEST
HARNESS

BA

TEST
HARNESS

HARNESS SIDE: C-02