Mitsubishi 380. Manual - part 118

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-469

INSPECTION PROCEDURE N-7: ETACS-ECU does not receive any signal from the trunk lid latch 
assembly.

.

CIRCUIT OPERATION

The ETACS-ECU operates the trunk lamp according 
to signal from the trunk lid latch assembly.

.

TECHNICAL DESCRIPTION (COMMENT)

The trunk lid latch assembly input signal is used to 
operate the trunk lamp. If the signal fails, this func-
tion will not work normally.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The trunk lid latch assembly may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

16DB350A

CONNECTOR:C-28

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

28

29

21

22

23

24

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

JUNCTION BLOCK

(REAR VIEW)

AC305260

AC

CONNECTOR: F-05

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-470

DIAGNOSIS

.

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check trunk lid latch assembly connector F-05 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector. 
Q: Is trunk lid latch assembly connector F-05 in good 

condition?
YES : Go to Step 2.
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 
trunk lid latch assembly should be normal.

STEP 2. Check the trunk lid latch assembly.
Remove the trunk lid latch assembly. Refer to GROUP 42, 
Trunk lid, Trunk lid latch inspection 

P.42-65

.

Q: Is the trunk lid latch assembly in good condition?

YES : Go to Step 3.
NO :  Replace the trunk lid latch assembly. The input signal 

from the trunk lid latch assembly should be able to be 
checked and the functions, which are described in the 
"Technical Description (comment)," should work 
normally.

STEP 3. Check ETACS-ECU connector C-217 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-217 in good condition?

YES : Go to Step 4.
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 
trunk lid latch assembly should be normal.

AC305260

CONNECTOR: F-05

AI

HARNESS SIDE

LEVER POSITION TESTER 

CONNECTION

SPECIFIED 
CONDITION

ON (Latch open)

2 

− Ground 

Less than 2 ohms

OFF (Latch shut)

2 

− Ground 

Open circuit

1 2

<FRONT 
VIEW>

ON

OFF

LEVER

16DB424A

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

28

29

21

22

23

24

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

JUNCTION BLOCK

(REAR VIEW)

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-471

STEP 4. Check the wiring harness between trunk lid latch 
assembly connector F-05 (terminal 2) and ETACS-ECU 
connector C-217 (terminal 37).

NOTE: Also check intermediate connector C-28 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-28 is damaged, repair or 
replace the connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between trunk lid latch assembly 

connector F-05 (terminal 2) and ETACS-ECU connector 
C-217 (terminal 37) in good condition?
YES : Replace the ETACS-ECU. If the functions described 

in "CIRCUIT OPERATION" work normally, the input 
signal from the trunk lid latch assembly 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 trunk lid latch 
assembly should be normal.

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

28

29

21

22

23

24

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

JUNCTION BLOCK

(REAR VIEW)

AC305260

CONNECTOR: F-05

AI

HARNESS SIDE

16DB350A

CONNECTOR:C-28

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-472

INSPECTION PROCEDURE N-8: Transmitter (integrated into key): ETACS-ECU does not receive any 
signal from the lock, unlock, trunk or panic switch.

CAUTION

Whenever the ECU is replaced, ensure that the input signal 
circuit is normal.

.

COMMENTS ON TROUBLE SYMPTOM

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

Input signal from the keyless entry transmitter is used to oper-
ate the keyless entry system. If the signal is abnormal, the key-
less entry system will not work normally.

.

POSSIBLE CAUSES

• Malfunction of the ETACS-ECU

• Malfunction of the keyless entry transmitter

• Defective battery of the keyless entry transmitter

1. Lock switch

2. Unlock switch

3. Trunk switch

4. Panic switch

5. Indicator lamp

Receiver and Transmitter Communication Circuit

Key Integrated Transmitter

ETACS-ECU