2005 MITSUBISHI 380 GROUP-90

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-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

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-451
INSPECTION PROCEDURE N-5: ETACS-ECU does not receive any signal from the front door lock
actuator.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or
systems according to signal from the front door lock
actuator:
Central door locking system
Keyless entry system
Dome 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 front door lock actuator 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

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-460
INSPECTION PROCEDURE N-6: ETACS-ECU does not receive any signal from the door lock switch
(incorporated in the power window main switch and front power window sub switch).
.
CIRCUIT OPERATION
The ETACS-ECU operates the central door locking
system according to signal from the door lock switch
(incorporated in the power window main switch and
front power window sub switch).
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the doors will not lock or
unlock. If the signal is not normal, the power window
main switch, front power window sub switch or the
ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The power window main switch or front power
window sub 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

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

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.
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

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-474
INSPECTION PROCEDURE N-9: ETACS-ECU does not receive any interior lamp loaded signal.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following equipment
or functions by the interior lamp loaded signal:
Interior lamp automatic shut-down function
Dome lamp
Ignition key hole illumination lamp
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the equipment or functions
described in "CIRCUIT OPERATION" do not work
normally.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
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

FRONT SEAT ASSEMBLY
INTERIOR52A-23
INSPECTIONM1522005500113
POWER SEAT CONTINUITY AND DIAGNOSIS
CHECK
SPECIAL TOOL:
MB991219: Inspection Test Harness
CIRCUIT DIAGRAMS:
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
NOTE: Check connectors and terminals for damage or
loose connections at the seat harness and all supply
circuits connections to seat. Repair or replace wiring
harness if damaged.
NON-MEMORY SEAT DIAGNOSIS
POWER SEAT SUPPLY AND GROUND CONNECTOR (D-40)
NOTE: The special tool (Inspection test harness) MB991219
for connector pin contact pressure should be used. The test
probe should never be forcibly inserted, as it may cause a
defective contact.
4-WAY TRACK (NON MEMORY)
NOTE: The special tool (Inspection test harness) MB991219
for connector pin contact pressure should be used. The test
probe should never be forcibly inserted, as it may cause a
defective contact. SUPPLY TEST
CONNECTION
(D-40) SPECIFIED CONDITION
BATTERY
SUPPLY112V
GROUND 2 Less than 2 ohms or 0V
SWITCH POSITION TEST CONNECTION SPECIFIED CONDITION
SWITCH MOTOR
REAR LIFT MOTOR UP 1 1 Less than 2 ohms
DOWN 4 5 Less than 2 ohms
FRONT LIFT MOTOR UP 2 1 Less than 2 ohms
DOWN 3 5 Less than 2 ohms