Mitsubishi Galant 9G. Manual — part 121

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-480

STEP 3. Check the front door switch (LH).
Remove the front door switch (LH). Refer to GROUP 42, Door,
Door Assembly

P.42-37

. Then check continuity between the

switch terminals and the body ground.

Q: Is the front door switch (LH) in good condition?

YES : Go to Step 4.
NO : Replace the front door switch (LH). If the functions

described in "CIRCUIT OPERATION" work normally,
the input signal from the front door switch (LH) should
be normal.

STEP 4. Measure resistance at the lower metal part of the
front door switch (LH) in order to check the ground circuit
to the front door switch (LH).
NOTE: Check that the front door switch (LH) is grounded to the
vehicle body via its mounting screw.
Remove the cap, and measure the resistance value between
the lower metal part and ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 5.
NO : Check the installation of the switch, and repair if

necessary. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
front door switch (LH) should be normal.

STEP 5. Check ETACS-ECU connector C-219 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-219 in good condition?

YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. If the functions described in "CIRCUIT

OPERATION" work normally, the input signal from the
front door switch (LH) should be normal.

SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

Released (ON)

1

− body ground

Less than 2 ohms

Pressed (OFF)

1

− body ground

Open circuit

1 2 3

ACX01865 AC

ON

OFF

AC210276AB

METAL PART

CUP

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-481

STEP 6. Check the wiring harness between front door
switch (LH) connector D-22 (terminal 1) and ETACS-ECU
connector C-219 (terminal 10).

NOTE: Also check junction block connector C-204 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-204 is damaged,
repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection

P.00E-2

.

Q: Is the wiring harness between front door switch (LH)

connector D-22 (terminal 1) and ETACS-ECU connector
C-219 (terminal 10) in good condition?
YES : Replace the ETACS-ECU. If the functions described

in "CIRCUIT OPERATION" work normally, the input
signal from the front door switch (LH) should be
normal.

NO : The wiring harness may be damaged or the

connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. If the
functions described in "CIRCUIT OPERATION" work
normally, the input signal from the front door switch
(LH) should be normal.

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

AC400532

HARNESS SIDE

CONNECTOR: D-22

AG

AC305415AJ

CONNECTOR: C-204

HARNESS SIDE

JUNCTION BLOCK

(FRONT VIEW)

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-482

STEP 7. Check front door switch (RH) connector D-34 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is front door switch (RH) connector D-34 in good

condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. If the functions described in "CIRCUIT

OPERATION" work normally, the input signal from the
front door switch (RH) should be normal.

STEP 8. Check the front door switch (RH).
Remove the front door switch (RH). Refer to GROUP 42, Door,
Door Assembly

P.42-37

. Then check continuity between the

switch terminals and the body ground.

Q: Is the front door switch (RH) in good condition?

YES : Go to Step 9.
NO : Replace the front door switch (RH). If the functions

described in "CIRCUIT OPERATION" work normally,
the input signal from the front door switch (RH) should
be normal.

STEP 9. Measure resistance at the lower metal part of the
front door switch (RH) in order to check the ground circuit
to the front door switch (RH).
NOTE: Check that the front door switch (RH) is grounded to the
vehicle body via its mounting screw.
Remove the cap, and measure the resistance value between
the lower metal part and ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 10.
NO : Check the installation of the switch, and repair if

necessary. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
front door switch (RH) should be normal.

AC400530

HARNESS SIDE

CONNECTOR: D-34

AM

SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

Released (ON)

1

− body ground

Less than 2 ohms

Pressed (OFF)

1

− body ground

Open circuit

1 2 3

ACX01865 AC

ON

OFF

AC210276AB

METAL PART

CUP

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-483

STEP 10. Check ETACS-ECU connector C-218 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-218 in good condition?

YES : Go to Step 11.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. If the functions described in "CIRCUIT

OPERATION" work normally, the input signal from the
front door switch (RH) should be normal.

STEP 11. Check the wiring harness between front door
switch (RH) connector D-34 (terminal 1) and ETACS-ECU
connector C-218 (terminal 65).

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

AC400530

HARNESS SIDE

CONNECTOR: D-34

AM