2005 MITSUBISHI 380 Workshop Manual

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-449
NOTE: Also check intermediate connector C-12 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-12 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection P.00E-2.
Q: Is the wiring harness between door lock key cylinder
switch connector E-14 (terminals 2) and ground in good
condition?
YES : No action is necessary and testing is complete.
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
systems described in "CIRCUIT OPERATION" work
normally, the input signal from the door lock key
cylinder switch should be normal.
STEP 5. 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 6.
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.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-450
STEP 6. Check the wiring harness between door lock key
cylinder switch connector E-14 (terminals 1 and 3) and
ETACS-ECU connector C-217 (terminals 25 and 42).
NOTE: Also check intermediate connector C-12 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-12 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection P.00E-2.
Q: Is the wiring harness between door lock key cylinder
switch connector E-14 (terminals 1 and 3) and
ETACS-ECU connector C-217 (terminals 25 and 42) in
good condition?
YES : Replace the ETACS-ECU. If the systems described in
"CIRCUIT OPERATION" work normally, the input
signal from the door lock key cylinder switch 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
systems described in "CIRCUIT OPERATION" work
normally, the input signal from the door lock key
cylinder switch should be normal.

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-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.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-453
STEP 3. Check the front door lock actuator (RH).
Disconnect front door lock actuator (RH) connector E-05. Then
check continuity between the terminals.
Q: Is the front door lock actuator (RH) in good condition?
YES : Go to Step 4.
NO : Replace the front door lock actuator (RH). If the
functions described in "CIRCUIT OPERATION" work
normally, the input signal from the front door lock
actuator (RH) should be normal.
STEP 4. Check the ground circuit to the front door lock
actuator (RH). Measure the resistance at front door lock
actuator (RH) connector E-05.
(1) Disconnect front door lock actuator (RH) connector E-05
and measure the resistance available at the wiring harness
side of the connector.
(2) Measure the resistance value between terminal 3 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 6.
NO : Go to Step 5. LEVER POSITION TESTER
CONNECTIONSPECIFIED
CONDITION
UNLOCK 1
3 Less than 2 ohms
LOCK 1
3 Open circuit

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-454
STEP 5. Check the wiring harness between front door lock
actuator (RH) connector E-05 (terminal 3) and ground.
NOTE: Also check intermediate connector C-12 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-12 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection P.00E-2.
Q: Is the wiring harness between front door lock actuator
(RH) connector E-05 (terminal 3) and ground in good
condition?
YES : No action is necessary and testing is complete.
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 front door lock
actuator (RH) should be normal.
STEP 6. 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 7.
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.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-455
STEP 7. Check the wiring harness between front door lock
actuator (RH) connector E-05 (terminal 1) and ETACS-ECU
connector C-217 (terminal 36).
NOTE: Also check intermediate connector C-12 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-12 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection P.00E-2.
Q: Is the wiring harness between front door lock actuator
(RH) connector E-05 (terminal 1) and ETACS-ECU
connector C-217 (terminal 36) in good condition?
YES : Replace the ETACS-ECU. If the functions described
in "CIRCUIT OPERATION" work normally, the input
signal from the front door lock actuator (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 front door lock
actuator (RH) should be normal.

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-456
STEP 8. Check front door lock actuator (LH) connector
E-15 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is front door lock actuator (LH) connector E-15 in good
condition?
YES : Go to Step 9.
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 (LH) should be normal.
STEP 9. Check the front door lock actuator (LH).
Disconnect front door lock actuator (LH) connector E-15. Then
check continuity between the terminals.
Q: Is the front door lock actuator (LH) in good condition?
YES : Go to Step 10.
NO : Replace the front door lock actuator (LH). If the
functions described in "CIRCUIT OPERATION" work
normally, the input signal from the front door lock
actuator (LH) should be normal.
LEVER POSITION TESTER
CONNECTIONSPECIFIED
CONDITION
UNLOCK 3
1 Less than 2 ohms
LOCK 3
1 Open circuit