2005 MITSUBISHI 380 Ignition

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-415
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.)
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A
STEP 1. Check the input signal (by using the pulse check
mode of the monitor).
Check the input signals from the front door switches.
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: Does diagnostic tool MB991958 sound when each front
door is opened and closed?
When the front door (RH) is opened and closed,
diagnostic tool MB991958 does not sound. : Go to Step
2.
When the front door (LH) is opened and closed,
diagnostic tool MB991958 does not sound. : Go to Step
7.
When either front door is opened and closed, diagnostic
tool MB991958 sounds. : Replace the ETACS-ECU. If the
functions described in "CIRCUIT OPERATION" work
normally, the input signal from the front door switches
should be normal.
STEP 2. Check front door switch (RH) connector D-34 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is front door switch (RH) connector D-34 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
front door switch (RH) should be normal.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-421
STEP 1. Use diagnostic tool MB991958 to select "ECU
COMM Check" on the SWS monitor display.
Check the column-ECU.
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958. Connect special tool MB991910 before con-
necting special tool MB991812. Be sure to connect special
tool MB991806 after turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS
monitor P.54B-13."
(2) Turn the ignition switch to the "ON" position.
(3) Operate the diagnostic tool according to the procedure
below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."
(4) Diagnostic tool (MUT-III) should show "OK" on the "ECU
COMM Check" menu for the "COLUMN ECU" menu.
Q: Is "OK" displayed for the "COLUMN ECU" menu?
YES : Go to Step 2.
NO : Refer to Inspection Procedure A-2 "Communication
with the column switch (column-ECU) is not possible
P.54B-68."

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-424
STEP 1. Use diagnostic tool MB991958 to select "ECU
COMM Check" on the SWS monitor display.
Check the column-ECU.
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958. Connect special tool MB991910 before con-
necting special tool MB991812. Be sure to connect special
tool MB991806 after turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS
monitor P.54B-13."
(2) Turn the ignition switch to the "ON" position.
(3) Operate the diagnostic tool according to the procedure
below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."
(4) Diagnostic tool (MUT-III) should show "OK" on the "ECU
COMM Check" menu for the "COLUMN ECU" menu.
Q: Is "OK" displayed for the "COLUMN ECU" menu?
YES : Go to Step 2.
NO : Refer to Inspection Procedure A-2 "Communication
with the column switch (column-ECU) is not possible
P.54B-68."

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-432
INSPECTION PROCEDURE N-1: ETACS-ECU does not receive any signal from the key reminder
switch.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or
systems according to signal from the key reminder
switch:
Forgotten key reminder
Keyless entry system
Timed locking mechanism
Dome lamp dimming function
Ignition key hole illumination lamp
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems
described in "CIRCUIT OPERATION" do not work
normally.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The key reminder switch may be defective
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
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP 1. Check key reminder switch connector C-310 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is key reminder switch connector C-310 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
key reminder switch should be normal.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-433
STEP 2. Check the key reminder switch.
Disconnect key reminder switch connector C-310. Then check
continuity between terminals.
Q: Is the key reminder switch in good condition?
YES : Go to Step 3.
NO : Replace the key reminder switch. If the functions
described in "CIRCUIT OPERATION" work normally,
the input signal from the key reminder switch should
be normal.
STEP 3. Check the ground circuit to the key reminder
switch. Measure the resistance at key reminder switch
connector C-310.
(1) Disconnect key reminder switch connector C-310 and
measure the resistance available at the wiring harness side
of the connector.
(2) Measure the resistance value between terminal 4 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. IGNITION KEY TESTER
CONNECTIONSPECIFIED
CONDITION
Removed 4
6 Open circuit
Inserted 4
6 Less than 2 ohms

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-440
INSPECTION PROCEDURE N-3: ETACS-ECU does not receive any signal from any of the door
switches.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or
systems according to signal from the front or rear
door switches:
Light reminder tone alarm function switch (RH)>
Door ajar warning buzzer
Ignition key reminder tone alarm switches>
Power window timer function switches>
Sunroof timer function
Headlamp automatic shutdown function door switch (RH)>
Keyless entry system
Timer lock
Dome lamp
Interior lamp automatic-shutdown function door switches>
Ignition key hole illumination lamp switch (RH)>
Door-ajar indicator lamp
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems
described in "CIRCUIT OPERATION" do not work
normally. If the signal is not normal, the front or rear
door switches or the ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The front or rear door switches may be defective
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
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.)
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A

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.
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.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-452
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.)
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A
STEP 1. Check the input signal (by using the pulse check
mode of the monitor).
Check the input signals from the front door lock actuators.
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 door lock actuators are operated, does
the diagnostic tool MB991958 sound?
When the front door lock actuator (RH) is operated, the
diagnostic tool MB991958 does not sound. : Go to Step
2.
When the front door lock actuator (LH) is operated, the
diagnostic tool MB991958 does not sound. : Go to Step
8.
STEP 2. Check front door lock actuator (RH) connector
E-15 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is front door lock actuator (RH) connector E-05 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
front door lock actuator (RH) should be normal.