Mitsubishi Montero (2004+). Manual — part 842

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-625

STEP 5. Check hood switch connector A-14 and
ETACS-ECU connector D-223 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are hood switch connector A-14 and ETACS-ECU

connector D-223 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 theft-alarm system operates normally,

it indicates that a correct signal is sent from the hood
switch.

STEP 6. Check the wiring harness between hood switch
connector A-14 (terminal 1) and ETACS-ECU connector
D-223 (terminal 48).

AC204167

CONNECTOR : A-14

HARNESS
SIDE

A-14(B)

A-14(B)

AC

1

2

AC204174

CONNECTOR : D-223

AC

D-223(B)

D-223(B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

AC204167

CONNECTOR : A-14

HARNESS
SIDE

A-14(B)

A-14(B)

AC

1

2

AC204174

CONNECTOR : D-223

AC

D-223(B)

D-223(B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-626

NOTE: Also check intermediate connector D-27 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector D-27 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 hood switch connector

A-14 (terminal 1) and ETACS-ECU connector D-223
(terminal 48) in good condition?
YES : Replace the ETACS-ECU. If the theft-alarm system

operates normally, it indicates that a correct signal is
sent from the hood switch.

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
theft-alarm system operates normally, it indicates that
a correct signal is sent from the hood switch.

INSPECTION PROCEDURE P-10: Transmitter: ETACS-ECU does not receive any signal from the lock,
unlock switch or panic switch.

.

CIRCUIT OPERATION
The ETACS-ECU receives signal through its receiver
from the transmitter, and operates the keyless entry
system according to the signal.

.

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the systems, which are
described in "CIRCUIT OPERATION", do not work
normally.

.

TROUBLESHOOTING HINTS

• The transmitter may be defective

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

AC204170

CONNECTOR : D-27

AH

10

4

8

7

3

9

5

1

6

2

Transmitter Input Circuit

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-627

STEP 1. Register the transmitter.
Replace the transmitter. Refer to GROUP 42, Keyless Entry
System, On-vehicle Service, How to register secret code

P.42-59

.

Q: Can the transmitter be registered correctly?

YES : If the systems, which are described in "CIRCUIT

OPERATION", work normally, the input signal from
the transmitter should be normal.

NO : Go to Step 2.

STEP 2. Check the transmitter battery.
Measure the voltage of the transmitter battery.

• The voltage should equal approximately 2.5 - 3.2 volts.

Q: Is the measured voltage approximately 2.5 - 3.2 volts?

YES : Go to Step 3.
NO : Replace the battery. If the transmitter can be

registered normally, and the systems, which are
described in "CIRCUIT OPERATION", operate
normally, it indicates that the transmitter is sending
normal signal to the ECU.

STEP 3. Check the transmitter.
Substantial other transmitter in order to register encrypted
code. Refer to GROUP 42, Keyless Entry System, On-vehicle
Service, How to register secret code

P.42-59

.

Q: Can the transmitter be registered correctly?

YES : If the systems, which are described in "CIRCUIT

OPERATION", work normally, the input signal from
the transmitter should be normal.

NO : Replace the ETACS-ECU. If the systems, which are

described in "CIRCUIT OPERATION", work normally,
the input signal from the transmitter should be normal.

ACX01609

CHECK AT ECU TERMINAL

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-628

CHECK AT ECU TERMINAL

M1549001200436

1. ETACS-ECU

NOTE: *: The terminal 1 to 20 connectors can not be
measured as the ETACS-ECU is installed directly on
the junction block. Therefore, this information is only
for reference.

19 20

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56

ACX01511

*

AB

TERMINAL
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL VALUE

1

Output to rear wiper

When rear wiper is operating

Battery positive voltage

2

Power supply to ignition switch
(ACC)

Ignition switch: "ACC"

Battery positive voltage

3

Output to rear washer

When rear washer is operating

Battery positive voltage

4

Output to door lock

When door lock actuator is
operating (doors locked)

Battery positive voltage

5

Input of automatic stop signal to
rear wiper

When rear wiper is operating

Battery positive voltage

6

Battery power supply (for ECU)

Always

Battery positive voltage

7

Input from door switches

Either of door switches: ON
(Door open)

0 V

8

Output to power window relay

When the power windows can
work

2 V or less

9

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

Battery positive voltage (for
central door lock)

Always

Battery positive voltage

14

Output to turn-signal light (LH)

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

15

Output to turn-signal light (RH)

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

16

Power supply to ignition switch
(IG1)

Ignition switch: "ON"

Battery positive voltage

17

Output to door unlock (excluding
direr's door)

When door lock actuator is
operating (doors unlocked)

Battery positive voltage

18

Output to dome light

When dome light is on

2 V or less

19

Output to door unlock (for
driver's door)

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

Battery positive voltage

20

Ground (for ECU)

Always

0 V

21

SWS communication line

Always

0

− 12 V (pulse signal)

22

Input of diagnosis indication
selection

When scan tool is connected

0 V

23

Ground (for sensor)

Always

0 V