door lock MITSUBISHI TRITON 1997 Workshop Manual

BODY ± Door42-24
Inspection Procedure 5
Passenger's side and rear power windows cannot be
operated by both the power window sub-switches and by
the power window main switch.
Probable cause
One of the following items can be defective:

Power supply circuit of the power window sub-switch

Earth circuit

Power window motor

Lock switch

Power window main switch

Power window sub-switch
Malfunction of power window main switch

Malfunction of power window sub-switch

Malfunction of power window motor

Malfunction of wiring harness or connector

Power window motor (passenger's side)
check (Refer to P.42-38.)NG
Replace
OK
Measure at the power window sub-
switch connector E-13.

Disconnect the connector and
measure at the harness side.

Voltage between 1 and body earth
OK:System voltageNGCheck the following connectors:
C-17, E-13NG
Repair
OK
Check trouble symptoms.
OK
Measure at the power window sub-
switch connector E-13.

Voltage between 3 and body earth
(When main switch is at DOWN)

Voltage between 6 and body earth
(When main switch is at UP)
OK:System voltageNGCheck the following connectors:
C-17, E-13NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between power
window sub-switch and the earth.NG
Repair
OK
Replace the power window sub-switch.
OK
Check the following connectors:
E-13, E-22NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between power
window sub-switch and power window
motor (passenger's side).OKReplace the power window main switch.
NG
RepairNG
Check the harness wire between power
window relay and power window sub-
switch, and repair if necessary.

BODY ± Door42-27
Inspection Procedure 8
When the glass is fully raised, it then lowers
automatically.
Probable cause
When the window is within 12 mm of being fully closed, the limit switch turns off
to prevent the window from being lowered. However, the above problem can occur
if there is a malfunction of the limit switch or a short-circuit in a harness.
Malfunction of limit switch

Malfunction of wiring harness or connector

Malfunction of power window main switch or sub-switch

Incorrect limit switch operation position
Limit switch operation position adjustment (Refer to P.42-39.)
Check trouble symptoms.
NG
Limit switch continuity check (Refer to P.42-39.)NG
Replace
OK
Check the following connectors:
E-03, E-10
E-13, E-21
E-04, E-08
E-15, E-19NG
Repair
OK
Check trouble symptoms.
NG
Check the harness between the limit switch and the power window
main switch or between the limit switch and the power window
sub-switch.OKDriver's side: Replace the power window main switch.
Passenger's side: Replace the power window sub-switch.
NG
Repair
Inspection Procedure 9
None of the door lock functions operate.
Probable cause
The cause may be a malfunction of the ETACS-ECU power supply circuit system
or of the earth circuit system.
Malfunction of ETACS-ECU

Malfunction of wiring harness or connector
Measure at the J/B connector C-81,
C-82.

Remove the ETACS-ECU and
measure at the J/B side.

Voltage between 1 and body earth
(C-82)

Voltage between 6 and body earth
(C-81)
OK:System voltageNGCheck the following connectors:
A-56X, C-81, C-82NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
C-87, C-91NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between ET-
ACS-ECU and the earth.NG
Repair
OK
Replace the ETACS-ECU.NG
Check the harness wire between fusible
link No.6 and J/B, and repair if neces-
sary.

BODY ± Door42-28
Inspection Procedure 10
None of the doors lock or unlock when the driver's-side
inside door locking knob is operated (including by means
of the door key).
Probable cause
The cause may be a malfunction of the door lock actuator switch, the ETACS-ECU
or of a wiring harness or connector.
Malfunction of front door lock actuator (driver's side)

Malfunction of ETACS-ECU

Malfunction of wiring harness or connector
MUT-II Pulse check
Front door lock actuator switch (driver's-
side) input signal
OK:The MUT-II buzzer sounds once
when the front door lock actuator
moves from the locked to the un-
locked position, or from the un-
locked to the locked position.NGDoor lock actuator check (driver's side).
(Refer to P.42-41.)NG
Replace
OK
Check the following connectors:
C-38, C-90, E-09NG
Repair
OK
Check trouble symptoms.OK
Replace the ETACS-ECU.NG
Check the harness wire between the
front door lock actuator (driver's side)
and ETACS-ECU, between front door
lock actuator and the earth, and repair
if necessary.
Inspection Procedure 11
Some doors do not lock or unlock.
Probable cause
The cause may be a malfunction of the door lock actuator or of a wiring harness
or connector.
Malfunction of door lock actuator

Malfunction of wiring harness or connector
Check the door lock actuator of the door that does not operate.
(Refer to P.42-41, 42.)NG
Replace
OK
Check the following connectors:
C-38, C-90, E-09
C-18, C-90, E-20
C-90, D-15, D-22, E-05
C-90, D-05, D-22, E-16OKCheck trouble symptoms.
NG
Check the harness between the ETACS-ECU and the door lock
actuator of the door that does not operate, and repair if necessary.
NG
Repair

54-3
REAR WINDOW DEFOGGER 83. . . . . . .
SPECIAL TOOL 83. . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 83. . . . . . . . . . . . . . . . .
Printed-heater Line Check 83. . . . . . . . . . . . . . . .
REAR WINDOW DEFOGGER SWITCH 84. . .
RADIATOR FAN MOTOR
Refer to GROUP 14 . . . . . . . . . . . . . . . . . . .
INTERCOOLER (INTERCOOLER FAN
MOTOR) Refer to GROUP 15. . . . . . . . . .
REAR DIFFERENTIAL LOCK
Refer to GROUP 27 . . . . . . . . . . . . . . . . . . .
SERVICE BRAKES (ABS)
Refer to GROUP 35B, 35C . . . . . . . . . . . .
DOOR GLASS AND REGULATOR
(POWER WINDOWS)
Refer to GROUP 42 . . . . . . . . . . . . . . . . . . . DOOR HANDLE AND LATCH (DOOR
LOCKING) Refer to GROUP 42. . . . . . . .
WINDSHIELD WIPER AND WASHER
Refer to GROUP 51 . . . . . . . . . . . . . . . . . . .
HEADLAMP WASHER
Refer to GROUP 51 . . . . . . . . . . . . . . . . . . .
DOOR MIRROR (ELECTRONIC
CONTROLLED DOOR MIRROR)
Refer to GROUP 51 . . . . . . . . . . . . . . . . . . .
FRONT SEAT (HEATED SEAT)
Refer to GROUP 52A . . . . . . . . . . . . . . . . .
SRS AIR BAG
Refer to GROUP 52B . . . . . . . . . . . . . . . . .
HEATER Refer to GROUP 55. . . . . . . . . .
AIR CONDITIONER
Refer to GROUP 55 . . . . . . . . . . . . . . . . . . .

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-8
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Communication with MUT-II is impossible.
(Communication with all systems is impossible.)
Probable cause
The cause is probably a defective power supply system (including earth) for the
diagnosis line.
Malfunction of connector

Malfunction of harness wire
Refer to GROUP 13A ± Troubleshoot-
ing.
Inspection Procedure 2
Communication with MUT-II is impossible. (Communica-
tion with the one-shot pulse input signal only is
impossible.)
Probable cause
The cause is probably a defective one-shot pulse input circuit system of the diagnosis
line.
Malfunction of connector

Malfunction of harness wire

Malfunction of ETACS-ECU
Check the harness wire between the
diagnosis connector and junction block.OKCheck the following connectors:
C-35, C-90NG
Repair
OK
Check trouble symptoms.NGReplace the ETACS-ECU.
NG
Repair
Inspection Procedure 3
Even if the driver's side door is opened, the key hole
illumination lamp does not illuminate.
Probable cause
The cause is probably a defective key hole illumination lamp circuit system or a defective
driver's side door switch input circuit system.
Malfunction of driver's side door switch

Malfunction of key hole illumination lamp

Malfunction of harness or connector

Malfunction of ETACS-ECU
Driver's side door switch input circuit
system check (Refer to Inspection Pro-
cedure 5 on P.54-9.)
OK
Key hole illumination lamp check
(Refer to P.54-22.)NG
Replace
OK
Disconnect the key reminder switch
connector C-72 and measure at the har-
ness side.

Voltage between the terminal No.1
and body earth
OK:System voltageOKCheck the following connectors:
C-72, C-86, C-91NG
Repair
OK
Check trouble symptom.
NGNG
Check the following connectors:
C-72, C-79NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the key re-
minder switch and junction block, and
repair if necessary.
Check the harness between the key re-
minder switch and junction block, and
repair if necessary.OKReplace the ETACS-ECU.
NG
Repair

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-9
Inspection Procedure 4
Key hole illumination lamp remains illuminated.
Probable cause
The cause is probably a short harness or a defective ETACS-ECU.
Malfunction of harness

Malfunction of ETACS-ECU
When the connector C-86 of the junction block is disconnected,
does the lamp switch off?NoCheck the harness between the key reminder switch and junction
block, and repair if necessary.
Ye s
Replace the ETACS-ECU.
Inspection Procedure 5
Driver's side door switch input circuit system check
Door switch check (Refer to GROUP
42 ± Door Assembly.)NG
Replace
OK
Door switch earth checkNG
Repair
OK
Disconnect the door switch connector
D-17 and measure at the harness side.

Voltage between the terminal No.2
and body earth
OK:5 VNGCheck the following connectors:
C-87, D-17, D-21NG
Repair
OK
Replace the ETACS-ECU.
OK
Check trouble symptom.NGCheck the harness between the door
switch and junction block, and repair
if necessary.

CHASSIS ELECTRICAL ± Headlamp54-41
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Communication with MUT-II is impossible.
(Communication with all systems is impossible.)
Probable cause
The cause is probably a defective power supply system (including earth) for the
diagnosis line.
Malfunction of connector

Malfunction of harness wire
Refer to GROUP 13A ± Troubleshoot-
ing.
Inspection Procedure 2
Communication with MUT-II is impossible. (Communica-
tion with the one-shot pulse input signal only is
impossible.)
Probable cause
The cause is probably a defective one-shot pulse input circuit system of the diagnosis
line.
Malfunction of connector

Malfunction of harness wire

Malfunction of ETACS-ECU
Check the harness wire between the
diagnosis connector and ETACS-ECU.OKCheck the following connectors:
C-35, C-90NG
Repair
NG
RepairOK
Check trouble symptom.NGReplace the ETACS-ECU.
Inspection Procedure 3
The ignition switch is turned to the OFF position and the
driver's side door is opened while the tail lamps or
headlamps are operating, but the light reminder warning
buzzer does not sound.
Probable cause
The cause is probably a defective lighting switch input circuit system or a defective
driver's side door switch input circuit system.
Malfunction of driver's side door switch

Malfunction of harness or connector

Malfunction of buzzer-ECU or ETACS-ECU
Driver's side door switch input circuit
system check
(Refer to Inspection Procedure 4.)
OK
Check the following connectors:
A-55X, C-81, C-91NG
Repair
OK
Check trouble symptom.NGCheck the harness wire between the
junction block and tail lamp relay.OKReplace the buzzer-ECU or ETACS-
ECU.
NG
Repair

CHASSIS ELECTRICAL ± Headlamp54-42
Inspection Procedure 4
Driver's side door switch input circuit system check
Door switch continuity check (Refer to
GROUP 42 ± Door Assembly.)NG
Replace
OK
Door switch earth checkNG
Repair
OK
Disconnect the door switch connector
D-17 and measure at the harness side.

Voltage between the terminal No.
2 and body earth
OK:5 VNGCheck the following connectors:
C-87, C-91, D-17, D-21NG
Repair
OK
Check trouble symptom.NGCheck the harness wire between the
door switch and junction block, and re-
pair if necessary.OK
Check trouble symptom.
NG
Replace the buzzer-ECU or ETACS-
ECU.

10
2.
Exit conditions from the adjustment mode
The ETACS-ECU cancels the adjustment mode when any of the following conditions is satisfied:
•
Diagnosis control: OFF (Disconnect the MUT-II>)
•
Key reminder switch: ON (Pull out the ignition key.)
•
Ignition switch: Other than LOCK (OFF)
•
Door switch: ON (Open the door)
•
After the ETACS_ECU has entered the adjustment mode, no adjustment is made within 3 minutes (If
any adjustment is made within 3 minutes, the ETACS-ECU monitors an adjustment operation for
other 3 minutes.
•
Other warning buzzer(s) sounds
3.
Adjustment of functions
Function Adjustment procedure
Keyless entry answerback function When the transmitter lock switch is turned on twice continuously
within 2 seconds, the lock answerback function toggles on and off.
•
If the function toggles on, the buzzer sounds once (default con-
dition).
•
If the function toggles off, the buzzer sounds twice,
When the transmitter unlock switch is turned on twice continuously
within 2 seconds, the unlock answerback function toggles on and
off.
•
If the function toggles on, the buzzer sounds once (default con-
dition).
•
If the function toggles off, the buzzer sounds twice,
Initialisation of all the ETACS func-
tions (From deactivation to activa-
tion)When the tailgate switch remains on for more than 20 seconds, th
buzzer sounds twice and he answer-back function of the keyless
entry system is initialised.
The buzzer will sound in 10 seconds (indicating that the ETACS-
ECU enters the adjustment mode), but the washer switch must re-
mains off for 20 seconds in order to initialise all the functions.
If the tailgate switch remains on for more than 20 seconds without
entering the adjustment mode, the system enters the adjustment
mode in 10 seconds, but does not initialise all of the functions.
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom Inspection procedure No. Reference page
None of the doors can be locked or unlocked using th
transmitter.142-3
All of the doors can be locked and unlocked using th
transmitter, but the room lamp or turn-signal lamp does
not flash or illuminate. (However, the room lamp oper-
ates normally when the doors are opened and closed.)242-4
Encrypted codes cannot be registered. 3 42-5
42-2BODY – Keyless entry system

11
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
None of the doors can be locked or unlocked using
the transmitter.Probable cause
The cause may be a malfunction of the transmitter or ETACS-
ECU, defective connection between ETACS-ECU and junction
block, defective power supply voltage to ETACS-ECU input
line due to commercial equipment, or the lock and unlock sig-
nals are not being sent to the ETACS-ECU.•
Malfunction of transmitter
•
Malfunction of ETACS-ECU
•
Malfunction of key reminder switch
•
Malfunction of wiring harness or connector
•
Malfunction of door switch
•
Defective connection between ETACS-ECU and
junction block
•
Defective power supply voltage to ETACS-ECU
input line due to commercial equipment
Check the central door lock systemCan the doors be locked and unlocked by the pas-
senger’s-side door key cylinder and lock knob?
YesNo
Has the encrypted code been registered properly? * NG Re-register the encrypted code. (Refer to P.42.6)
OK
Replace the transmitter battery. (Refer to P.42-6)
NG
Is a commercial equipment equipped?
NoYes
Remove that equipment, and then check trouble
symptoms.
NG
Check the connection between ETACS-ECU and
junction block claw.NG
Repair
OK
NG .Check the following connectors:
A-56X, C-81, C-91
OK NG
Measure at the ETACS-ECU connector C-91.
•
Disconnect the connector, and measure at the
harness side.
•
Voltage between 2 and body earth
OK:
System voltageCheck trouble symptomsRepair
OK NG
Check the harness wire, and repair if necessary.
•
Between fusible link No.5 and ETACS-ECU
Door switch continuity check
OK NG
Mut-II Pulse Check
•
Door switch input signal
OK:
MUT-II Buzzer sounds once when opening
and closing each door.NG
Repair
OK
Check the following connectors:
C-110, D-03, D-07, D-14, D-17, D-21
OK NG
Check trouble Symptoms.Repair
NG
To next pageCheck the harness wire, and repair if necessary.
•
Between ETACS-ECU and door switch
NOTE
*: This should be done if a transmitter, receiver or ETACS-ECU has been replaced, and if a secret cod
has not been registered properly
BODY – Keyless Entry System42-3