Mitsubishi Montero (2002-2004). Manual — part 399

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-143

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.

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

SWS INPUT SIGNAL PROCEDURES

54Bc-144

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

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.

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

AC204170

CONNECTOR : D-27

AH

10

4

8

7

3

9

5

1

6

2

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-145

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

• MB991502: Scan Tool (MUT-II)

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-

56

.

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.

Transmitter Input Circuit

INPUT SIGNAL PROCEDURES

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SWS INPUT SIGNAL PROCEDURES

54Bc-146

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.42-56

.

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