Mitsubishi Galant 9G. Manual — part 138

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-548

NOTE: Also check junction block connector C-215 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-215 is damaged,
repair or replace the damaged component(s) as described in
Q: Is the wiring harness between ETACS-ECU connector

C-219 (terminal 18) and ignition switch (ACC) in good
condition?
YES : No action is necessary and testing is complete.
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 or equipment described in "CIRCUIT
OPERATION" work normally, the interior light loaded
signal should be normal.

AC305415

HARNESS SIDE

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-215

AV

CHECK AT ECU TERMINAL

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-549

CHECK AT ECU TERMINAL

M1549001201031

ETACS-ECU

NOTE: *:The terminal No.1 to 20 connectors cannot
be measured as the ETACS-ECU is installed directly
on the junction block. Therefore, this information is
only for reference.

AC101265

C-218

C-219

C-217

AC

TERMINAL
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL VALUE

1

Output to power window relay

When the power windows can
work

Battery positive voltage

2

Battery positive voltage (for
central door lock)

Always

Battery positive voltage

3

Ground (for ECU)

Always

0 V

4

Power supply to ignition switch
(ACC)

Ignition switch: "ACC"

Battery positive voltage

5

Output to dome light

When dome light is on

2 V or less

6

Power supply to interior light

Always (when interior light
shutoff function is not operating)

Battery positive voltage

7

Input from rear door switch (LH) Rear door switch (LH): ON (rear

door (LH) open)

0 V

8

Power supply to ignition switch
(IG1)

Ignition switch: "ON"

Battery positive voltage

9

Output to turn-signal light (RH)

When turn-signal light (RH) is on Battery positive voltage

10

Input from driver’s door switch

Driver's door switch: ON (driver's
door open)

0 V

11

Battery power supply for
turn-signal light

Always

Battery positive voltage

12

Output to door lock

When door lock actuator is
operating (doors locked)

Battery positive voltage

13

Output to door unlock (excluding
driver's door)

When door lock actuator is
operating (doors unlocked)

Battery positive voltage

14

Output to turn-signal light (LH)

When turn-signal light (LH) is on Battery positive voltage

15

− 17

−

−

−

18

Power supply to ignition switch
(ACC)

Ignition switch: "ACC"

Battery positive voltage

19

−

−

−

20

Battery power supply (for ECU)

Always

Battery positive voltage

21

−

−

−

CHECK AT ECU TERMINAL

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-550

22

Output to door unlock (for
driver's door)

When driver's door lock actuator
is operating (doors unlocked)

Battery positive voltage

23, 24

−

−

−

25

Input of door lock key cylinder
switch (UNLOCK) signal

Door lock key cylinder switch:
UNLOCK

0 V

26

− 28

−

−

−

29

Input of rear door lock actuator
(UNLOCK) signal

Rear door lock actuator:
UNLOCK

0 V

30

Input of key reminder switch
signal

Key reminder switch: ON (when
ignition key is removed)

0 V

31, 32

−

−

−

33

Input of door lock switch (LOCK)
signal

Door lock switch (incorporated in
power window switch): LOCK

0 V

34

Input of door lock switch
(UNLOCK) signal

Door lock switch (incorporated in
power window switch): UNLOCK

0 V

35

Input from rear door switch (RH) Rear door switch (RH): ON (rear

door (RH) open)

0 V

36

Input of driver's door lock
actuator (UNLOCK) signal

Driver's door lock actuator:
UNLOCK

0 V

37

Input from trunk lid latch
assembly

Trunk lid latch: ON (trunk open)

0 V

38

Ground (for sensor)

Always

0 V

39

− 41

−

−

−

42

Input of door lock key cylinder
switch (LOCK) signal

Door lock key cylinder switch:
LOCK

0 V

43

Input of front passenger's door
lock actuator (UNLOCK) signal

Front passenger’s door lock
actuator: UNLOCK

0 V

44

Output to horn relay

When a horn sounds by the
keyless entry horn answerback
function

2 V or less

45

− 50

−

−

−

51

Output to data link connector

When DTC sets

0

− 12 V (pulse signal)

When input check signal is
output

0

− 12 V (when input

pulse signal is
fluctuating)

52, 53

−

−

−

54

Input of fog light switch signal

Fog light switch: ON

0 V

55

Input of hazard warning light
switch signal

Hazard warning light switch: ON
(When the switch is depressed)

0 V

56

Ground (for sensor)

Always

0 V

57, 58

−

−

−

59

SWS communication line

Always

0

− 12 V (pulse signal)

TERMINAL
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL VALUE

CHECK AT ECU TERMINAL

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SIMPLIFIED WIRING SYSTEM (SWS)

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60

− 64

−

−

−

65

Input from front passenger's door
switch

Front passenger's door switch:
ON (front passenger's door
open)

0 V

66

Input of signal from variable
intermittent wiper control switch

Ignition switch: "ACC,"
Variable intermittent wiper
control switch: "FAST" to
"SLOW"

0

→ 2.5 V

67

Input of diagnosis indication
selection

When scan tool is connected

0 V

68

Output of data request signal

Always

0

− 12 V (pulse signal)

69

Output to ignition key hole
illumination light

When ignition key hole
illumination light is on

0 V

70

−

−

−

71

Power supply to interior light

Always (when interior light
shutoff function is not operating)

Battery positive voltage

72

− 74

−

−

−

TERMINAL
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL VALUE