Mitsubishi 380. Manual - part 112

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-445

STEP 10. 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 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 
rear door switch (RH) should be normal.

STEP 11. Check the wiring harness between rear door 
switch (RH) connector D-06 (terminal 1) and ETACS-ECU 
connector C-217 (terminal 35).
Q: Is the wiring harness between rear door switch (RH) 

connector D-06 (terminal 1) and ETACS-ECU connector 
C-217 (terminal 35) in good condition?
YES : Replace the ETACS-ECU. If the functions described 

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

16DB307A

CONNECTOR: C-217

HARNESS SIDE

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JUNCTION BLOCK

(REAR VIEW)

16DB307A

CONNECTOR: C-217

HARNESS SIDE

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JUNCTION BLOCK

(REAR VIEW)

16DB464A

CONNECTORS: D-06, D-16

D-06

D-16

HARNESS SIDE

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-446

INSPECTION PROCEDURE N-4: ETACS-ECU does not receive any signal from the door lock key 
cylinder switch.

.

CIRCUIT OPERATION

The ETACS-ECU operates the central door locking 
system according to signal from the door lock key 
cylinder switch.

.

TECHNICAL DESCRIPTION (COMMENT)

If the signal is not normal, the systems, which are 
described in "CIRCUIT OPERATION", do not work 
normally.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The door lock key cylinder switch may be defec-

tive

• The wiring harness or connectors may have 

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

• The ETACS-ECU may be defective

16DB310A

CONNECTOR: C-12

16DB307A

CONNECTOR: C-217

HARNESS SIDE

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JUNCTION BLOCK

(REAR VIEW)

16DB465A

E-14 (B)

HARNESS SIDE

CONNECTOR: E-14

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-447

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check door lock key cylinder switch connector 
E-14 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector. 
Q: Is door lock key cylinder switch connector E-14 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 systems described in "CIRCUIT 

OPERATION" work normally, the input signal from the 
door lock key cylinder switch should be normal.

STEP 2. Check the door lock key cylinder switch.
Disconnect door lock key cylinder switch connector E-14. Then 
check continuity between the switch terminals.

Q: Is the door lock key cylinder switch in good condition?

YES : Go to Step 3.
NO :  Replace the door lock key cylinder switch. If the 

systems described in "CIRCUIT OPERATION" work 
normally, the input signal from the door lock key 
cylinder switch should be normal.

16DB465A

E-14 (B)

HARNESS SIDE

CONNECTOR: E-14

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

LOCK

2 

− 3

Less than 2 ohms

Neutral (OFF)

1 

− 2, 2 − 3

Open circuit

UNLOCK

1 

− 2

Less than 2 ohms

AC210743

1

3

2

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-448

STEP 3. Check the ground circuit to the door lock key 
cylinder switch. Measure the resistance at door lock key 
cylinder switch connector E-14.
(1) Disconnect door lock key cylinder switch connector E-14 

and measure the resistance available at the wiring harness 
side of the connector.

(2) Measure the resistance value between terminal 2 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 :  Go to Step 4.

STEP 4. Check the wiring harness between door lock key 
cylinder switch connector E-14 (terminal 2) and ground.

16DB465A

E-14 (B)

HARNESS SIDE

CONNECTOR: E-14

AC209364JC

CONNECTOR E-14
(HARNESS SIDE)

16DB465A

E-14 (B)

HARNESS SIDE

CONNECTOR: E-14