Mitsubishi 380. Manual - part 111

 

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Mitsubishi 380. Manual - part 111

 

 

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-441

STEP 1. Check the input signal (by using the pulse check 
mode of the monitor).
Check the input signals from the all door switches.

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958.
(1) Connect the diagnostic tool MB991958. Refer to "How to 

connect SWS monitor 

P.54B-13

."

(2) Operate diagnostic tool MB991958 according to the 

procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."

(3) Check that diagnostic tool MB991958 sounds.

Q: When the front and rear doors are opened/closed, does 

the diagnostic tool MB991958 sound?
When the front doors are opened and closed, diagnostic 
tool MB991958 does not sound. : 
Refer to Inspection 

Procedure M-4 "ETACS-ECU does not receive any 
signal from the front door switches 

P.54B-413

."

When the rear door (LH) is opened and closed, 
diagnostic tool MB991958 does not sound. : 
Go to Step 

2.

When the rear door (RH) is opened and closed, 
diagnostic tool MB991958 does not sound. : 
Go to Step 

7.

STEP 2. Check rear door switch (LH) connector D-16 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is rear door switch (LH) connector D-16 in good 

condition?
YES : 
Go to Step 3.
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 (LH) should be normal.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

16DB464A

CONNECTORS: D-06, D-16

D-06

D-16

HARNESS SIDE

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-442

STEP 3. Check the rear door switch (LH).
Remove the rear door switch (LH). Refer to GROUP 42, Door, 
Door Assembly 

P.42-37

. Then check continuity between the 

switch terminals and the body ground.

Q: Is the rear door switch (LH) in good condition?

YES : Go to Step 4.
NO :  Replace the rear door switch (LH). If the functions 

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

STEP 4. Measure resistance at the lower metal part of the 
rear door switch (LH) in order to check the ground circuit 
to the rear door switch (LH).

NOTE: Check that the rear door switch (LH) is grounded to the 
vehicle body via its mounting screw.
Remove the cap, and measure the resistance value between 
the lower metal part 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 :  Check the installation of the switch, and repair if 

necessary. If the functions described in "CIRCUIT 
OPERATION" work normally, the input signal from the 
rear door switch (LH) should be normal.

STEP 5. Check ETACS-ECU connector C-219 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-219 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 functions described in "CIRCUIT 

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

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Released (ON)

− body ground

Less than 2 ohms

Pressed (OFF)

− body ground

Open circuit

1 2 3

ACX01865AC

ON

OFF

AC210276AB

METAL PART

CUP

54DB014A

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-443

STEP 6. Check the wiring harness between rear door 
switch (LH) connector D-16 (terminal 1) and ETACS-ECU 
connector C-219 (terminal 7).

NOTE: Also check junction block connector C-204 for loose, 
corroded, or damaged terminals, or terminals pushed back in 
the connector. If junction block connector C-204 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 rear door switch (LH) 

connector D-16 (terminal 1) and ETACS-ECU connector 
C-219 (terminal 7) 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 (LH) 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 
(LH) should be normal.

54DB014A

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

16DB464A

CONNECTORS: D-06, D-16

D-06

D-16

HARNESS SIDE

16DB324A

CONNECTOR: C-204

HARNESS SIDE

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-444

STEP 7. Check rear door switch (RH) connector D-06 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is rear door switch (RH) connector D-06 in good 

condition?
YES : 
Go to Step 8.
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 8. Check the rear door switch (RH).
Remove the rear door switch (RH). Refer to GROUP 42, Door, 
Door Assembly 

P.42-37

. Then check continuity between the 

switch terminals and the body ground.

Q: Is the rear door switch (RH) in good condition?

YES : Go to Step 9.
NO :  Replace the rear door switch (RH). If the functions 

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

STEP 9. Measure resistance at the lower metal part of the 
rear door switch (RH) in order to check the ground circuit 
to the rear door switch (RH).

NOTE: Check that the rear door switch (RH) is grounded to the 
vehicle body via its mounting screw.
Remove the cap, and measure the resistance value between 
the lower metal part and ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 10.
NO :  Check the installation of the switch, and repair if 

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

16DB464A

CONNECTORS: D-06, D-16

D-06

D-16

HARNESS SIDE

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Released (ON)

− body ground

Less than 2 ohms

Pressed (OFF)

− body ground

Open circuit

1 2 3

ACX01865AC

ON

OFF

AC210276AB

METAL PART

CUP

 

 

 

 

 

 

 

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