Mitsubishi Galant (2004+). Manual — part 387

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-159

STEP 41. Check the CAN_L line (communication line
including the SRS-ECU) between joint connector (3) and
the SRS-ECU connector for short to the power supply.

Measure the voltage 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

voltage at the wiring harness side of joint connector (3)
C-02.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal

14 and body ground.

OK: 4.0 V or less

Q: Does the voltage measure 4.0 V or less?

YES : If the voltage measures 4.0 V or less, go to Step 47 .
NO : If the voltage measures more than 4.0 V, go to Step

42.

STEP 42. 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 43.
NO : Repair the damaged parts.

AC305231AP

CONNECTOR: C-02

AC209365

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22

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AC209365

AC209365GE

HARNESS SIDE: C-02

TEST
HARNESS

AC305233 AI

CONNECTOR: C-22

C-22 (Y)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-160

STEP 43. Check the CAN_L-side bus line (communication
line including ECUs) of the floor wiring harness for short
to the power supply. Measure the voltage at 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 intermediate connector C-22, and measure the

voltage at the male side (at floor wiring harness side).

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between intermediate connector

terminal 23 and body ground.

OK: 4.0 V or less

Q: Does the voltage measure 4.0 V or less?

YES : If the voltage measures 4.0 V or less, go to Step 46.
NO : If the voltage measures more than 4.0 V, go to Step

44.

STEP 44. Check SRS-ECU connector C-121 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 SRS-ECU connector C-121 in good condition?

YES : Go to Step 45.
NO : Repair the damaged parts.

AC305233 AI

CONNECTOR: C-22

C-22 (Y)

AC209365

AC209365GF

MAIL SIDE: C-22

TEST
HARNESS

AC305233 AJ

CONNECTOR: C-121

HARNESS SIDE

C-121 (Y)

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DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-161

STEP 45. Check the CAN_L line (communication line only)
between the SRS-ECU connector and the intermediate
connector for a short circuit. Measure the voltage at

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 intermediate connector C-22 and SRS-ECU

connector C-121, and measure the voltage at the male side
of intermediate connector C-22 (at floor wiring harness
side).

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between intermediate connector

terminal 23 and body ground.

OK: 1.0 V or less

CAUTION

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

P.54C-5

.

Q: Does the voltage measure 1.0 V or less?

YES : If the voltage measures 1.0 V or less, diagnose CAN

bus lines thoroughly by referring to

P.54C-534

.

NO : If the voltage measures more than 1.0 V, repair the

wiring harness between intermediate connector C-22
and SRS-ECU connector.

AC305234AC

CONNECTORS: C-22, C-121

C-121 HARNESS SIDE

C-121 (Y)

C-22 (Y)

C-22

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AC209365

AC209365GF

MAIL SIDE: C-22

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-162

STEP 46. Check the CAN_L line (communication line only)
between joint connector (3) and the intermediate
connector for a short circuit. Measure the voltage 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 intermediate connector C-22 and joint

connector (3) C-02, and measure the voltage at the wiring
harness side of joint connector (3) C-02.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal

14 and body ground.

OK: 1.0 V or less

CAUTION

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

P.54C-5

.

Q: Does the voltage measure 1.0 V or more?

YES : If the voltage measures 1.0 V or less, diagnose CAN

bus lines thoroughly by referring to

P.54C-534

.

NO : If the voltage measures more than 1.0 V, repair the

wiring harness between intermediate connector C-22
and joint connector (3).

AC305231AP

CONNECTOR: C-02

AC305233 AI

CONNECTOR: C-22

C-22 (Y)

AC209365

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22

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14

2

13

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12

AC209365

AC209365GE

HARNESS SIDE: C-02

TEST
HARNESS