Mitsubishi Galant 9G. Manual — part 1358

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-536

STEP 16. Check intermediate connector C-22 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 intermediate connector C-22 in good condition?

YES : Go to Step 17.
NO : Repair the damaged parts.

STEP 17. Check the CAN bus lines between intermediate
connector and the SRS-ECU. Measure the resistance
between intermediate connector C-22 and SRS-ECU
connector C-121.

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-22 and SRS-ECU

connector C-121, and measure the resistance at the wiring
harness sides of intermediate connector C-22 and
SRS-ECU connector C-121.

(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.

AC305233 AI

CONNECTOR: C-22

C-22 (Y)

AC305234AC

CONNECTORS: C-22, C-121

C-121 HARNESS SIDE

C-121 (Y)

C-22 (Y)

C-22

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DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-537

(4) Measure the resistance between intermediate connector

terminal 22 and SRS-ECU connector terminal 32.

OK: 2 ohms or less

(5) Measure the resistance between intermediate connector

terminal 23 and SRS-ECU connector terminal 43.

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 18.

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 intermediate
connector and the SRS-ECU connector.

AC204582

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AC204582

TEST
HARNESS

CC

TEST
HARNESS

MALE SIDE: C-22

HARNESS SIDE: C-121

AC204582

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AC204582

TEST
HARNESS

CB

TEST
HARNESS

MALE SIDE: C-22

HARNESS SIDE: C-121

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-538

STEP 18. Check the CAN bus lines between joint
connector (3) and the intermediate connector. Measure the
resistance between joint connector (3) C-02 and
intermediate connector C-22.

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 intermediate

connector C-22, and measure the resistance at the wiring
harness sides of joint connector (3) C-02 and intermediate
connector C-22.

(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.

AC305231AP

CONNECTOR: C-02

AC305233 AI

CONNECTOR: C-22

C-22 (Y)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-539

(4) Measure the resistance between joint connector (3)

terminal 3 and intermediate connector terminal 22.

OK: 2 ohms or less

(5) Measure the resistance between joint connector (3)

terminal 14 and intermediate connector terminal 23.

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, power

supply to the SRS-ECU may be suspected. Diagnose
the supplemental restraint system. Refer to GROUP
52B, SRS air bag diagnosis, equipment diagnosis

P.52B-29

.

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 joint
connector (3) and the intermediate connector.

AC204582

AC204582

HARNESS SIDE: C-02

TEST
HARNESS

CE

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TEST
HARNESS

FEMALE SIDE: C-22

AC204582

AC204582

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TEST
HARNESS

CD

TEST
HARNESS

HARNESS SIDE: C-02

FEMALE SIDE: C-22