1991 MITSUBISHI ECLIPSE Service Manual

BODY - Troubleshooting23-13
OPERATION
TROUBLESHOOTING HINTS
-.l If the inside lock knobs of the doors are placedin the LOCK (or UNLOCK) position, the switch inthe door lock actuator will be “OFF” (or “ON”),
and the output transistor will be “ON” for 0.5
second according to the timer function in the
door lock control unit (or theft-alarm control unit).As a result, the LOCK side (or UNLOCK side) of
the door lock relay will be “ON”, operating the
actuators of all of the doors.
NOTE
The door lock actuator contains a PTC thermistor
to prevent damage caused by overheating of the
motor. If the central door lock is frequently used,the actuator may temporarily fail to operate. If it
returns to normal in a few minutes, it is not
defective.
1.
2.One of the door lock actuators fails to operate.
l Check the door actuator which fails to
operate.Cannot be placed in the LOCK or UNLOCK
position by the inside lock knob on either driver’s
or front passenger’s seat side.0 Check the switch in the actuator.0 Check the door lock control unit (or
theft-alarm control unit).
DOOR LOCK CONTROL UNIT (OR THEFT-ALARM CONTROL UNIT) TERMINAL VOLTAGE (Connector
Connected)
TerminalSignal nameConditionTerminalNo.voltage1 or
5”’Door lock relayThe moment the inside lock knob is0.5 vs2
activation signal
pressed down (approx. 0.5 sec.)
NormallySystem voltage2 or 19”’
(Driver’s seat side) insideWhen the inside lock knob is placedSystem voltage
door lock knob signalin the “LOCK” position
When the inside lock knob is placedov
in the “UNLOCK” position3 or
4”’Door lock relayThe moment the inside lock knob is0.5 v2
activation signalpulled up (approx. 0.5 sec.)
NormallySystem voltage4 or 20”’
(Passenger’s seat side)When the inside lock knob is placedSystem voltage
inside door lock knob signalin the “LOCK” position
When the inside lock knob is placedovin the “UNLOCK” position5 or
12*’Power supplyAlwaysSystem voltage6 or
7(11)*’GroundAlwaysov
NOTE*I: Vehicles with theft-alarm system.
*2:Because of the internal resistance of the output transistor, the normal terminal voltage is 0.5 V. If it is 0 V, an open orshort circuit in the harness is suspected.

23-14BODY - Troubleshooting
ELECTRIC REMOTE CONTROLLED MIRROR
CIRCUIT DIAGRAM
REMOTE&;;NT;LLED
SWITCH
MS-AC-UlSW-NC
L\/\I7
F
cl,,C
F
#
E-59
IpJJ%J
\/
3‘9g
4t
5
IL
;,,5 E-57m.--
!3
E-63
[z
J/BE-03
II
(LEFT SIDE)(RIGHT SIDE)LJt
REMOTE CONTROL MIRROR
1
-
i'
E-57
N23EBBD
OPERATIONl When the remote controlled mirror switch is
operated while the ignition key is in “ACC” or“ON” position, current flows through fuse No.@ remote controlled mirror switch, remote
con-trolled mirror, remote controlled mirror switch,
and ground, causing the mirror to move.
TROUBLESHOOTING HINTSNeither right nor left mirror operates
1) Also cigarette lighter does not operate0 Check fuse.
2) Cigarette lighter operates
l Check remote controlled mirror switch.

c
BODY - Troubleshooting2345
IUZZER < Vechicles for Canada >
CIRCUIT DIAGRAMIGNITION
J/B0
10A
c-37x
El34
SEAT BELT
TIMER
'ITCH(IG1)
1OA
y4 C-52
/
WHEN KEYIS REMOVED4,
II
I
I
I
I
I
IIII
I
I
II
I
I
I
I
IIIIIII
.
6
I=3?;IWELTBUZZER
\\ (B)
"4
J/B\I
"5 c-54
WITH
R!Ei&-ESTEM
DIODE
E-52
91FRONT DOOR SWITCH
cu(LEFT SIDE)
N23EBABa
KX35-AC-UlblB-NC

23-16BODY - Troubleshooting
OPERATION
Key-reminder warning0 Battery voltage is always supplied, through sub
fusible link No.
@, to the key-reminder switch.0 When the driver’s seat door is opened while the
ignition key is still in the key cylinder, the door
switch is switched ON, electricity flows to sub
fusible link No.
0, the key-reminder switch, the
buzzer, the door switch, and ground, and the
buzzer sounds.
Seat belt warning0 Battery voltage is applied, through fuse No.
0,to the seat belt timer when the ignition key is at
the “ON” position.0 Electricity flows to sub fusible link No. @, the
key-reminder switch, the seat belt warning light,
the seat belt timer, and ground, and the seat beltwarning light illuminates for approx. 6 seconds.0
If the driver does not buckle the seat belt, the seatbelt switch is switched ON, electricity flows to
sub fusible link No. @, the key-reminder switch,the buzzer, the seat belt switch, the seat belt
warning timer, and ground, and the buzzer
sounds for approx. 6 seconds.0 When the driver buckles the seat belt, the seat
belt switch is switched OFF and the buzzer stops.
TROUBLESHOOTING HINTS
Key-reminder warningThe key-reminder warning doesn’t sound.
(1) The seat belt warning function is OK.
l Check the door switch.
(2) The seat belt warning also doesn’t function.0 Check the buzzer.
Seat belt warning1. The seat belt warning doesn’t function.
(1) The seat belt warning light illuminates.0 Check the seat belt switch.
(2) The seat belt warning light also does not
function (but the key-reminder warning
functions normally. 10 Check the seat belt timer.
(3) The seat belt warning light also does not
function (and the key-reminder warning also
does not function).0 Check the key-reminder switch.
2.The buzzer doesn’t stop even though the driver’s
seat belt has been buckled.0 Check the seat belt switch.
3.The seat belt warning light doesn’t illuminate (but
the buzzer sounds).l Check the light bulb.
’ I

BODY - Troubleshootina234 7AUTOMATIC
SEAT BELT N23EBGD
CIRCUIT DIAGRAM
IGNSW1
b
c
ION'H (IGl)
3-BW
I
COMBINATION
METER2
L
:I
3
D-06 i
E
WHEN KE
l%OVEO
14
-----1
I
I
I
I
f51
II
>
I
I:
I
I52
1
I
I13 ;----
1OAb10A\,7“4
4C-52 m
AUTOMATIC
SEAT BELT
CONTROL UNIT
P2
St1ELT
M6-AC-Ul6lZ-NCm
.---
.,*i
i
6
c:
13
W'HEN KEY&TALLEDm
!
43cu

23-18BODY - Troubleshooting
AUTOMATIC SEAT BELT
SUB FUSIBLE LINK QCONTROL UNITIE-41
-------____---__-----~-~--~~~-----I1
2E-46
I
I
I
I
‘1 II I
I II II I
I II I
I I
I II I
I I
I II I
I I
I II I
I I
_----------
1
sL
E-57
t
--A37t
1 :
1
I
I
I
IDOORLATCH 7-I
TF;W;H cLo8'I
SIDE), IE-51
9+3 I
125!?‘pIcr.3,,7 f----
m
I
AUTOMATIC SEIBELT MOTOR R
!3
(RIGHT SIDE)
ON$ .aOFF
I I
1 ..
I I
I I
jI I
I I
I I
i I------ I
I
I
I
I
__----J
\/I
‘,“piaq
E!G__ --------3 5
slx
3 A0
++1
4
:
c_---
2.
L----------------:1--1
2
15_---_---_____---~--
II
ISk3m
11
ICL-,,7L---- ,,
m
.h7
c-51 --J/B
LL
, 2 3 4 C-54 “5
56678m
SIDE) AUTOMATIC SEAT BELTE-07CONTROL UNIT
E-41
AUTOMATIC SEAT BELTCONTROL UNITE-41
&- Remark=*The connectqr,indicated,QYthe x SYmbOl is aPPIicat)le to
vehicles with ABS.

BODY - Troubleshootinn2349Trouble symptom
Driver’s and/or
front passenger’s
system does not
function
CauseFuse blown or disconnected
Open harness wire or
disconnected connectorCheck methodRemedyCheck fuse
@IReplace or reconnectthe fuse
Check using check charts No. 1, 3 and 5
Defective switch
Defective motor
Defective relay
Defective control unit
Defective driving deviceCheck using check chart No. 5
Check using check chart No. 3
Check using check chart No. 3
-Replace the control unit
-Replace the driving
device assemblyWarning light
does notlluminate or
flashFuse blown or disconnected
Open harness wire or
disconnected connectorCheck fuse
@IReplace or reconnectthe fuse
Check using check charts No. 1, 2, 4 and 5
Defective switch
Warning light bulb blown
or in poor contactCheck using check charts No. 2, 4 and 5
Check using check chart No. 2
3uzzer does notsoundDefective control unit
Fuse blown or disconnected
Defective buzzer
-Check fuse @
Refer to Inspection
section
(P.23-97.)Replace the control unit
Replace or reconnectthe fuse
Replace the buzzerOpen harness wire or
disconnected connectorCheck using check chart No. 2
Defective control unit
-Replace the control unit
The slide anchorDefective driving device,Try to move the slideIf the slide anchor does
foes not move fromor problem in electricalanchor in both directionsnot move:
he “fasten” rangecircuitby hand
Replace the drivingnto “release”device assemblyange, or from the
‘release”range intoIf the slide anchor moves:
he “fasten” rangeCheck using check
charts No. 1, 2, 3
and 5
Glide anchor moves
00 slowly
Slide anchor stopsralfwayForeign matter in guide rail
Defective retractor
(remains in locked state)
-Clean or replace the
driving device assembly
Check retractor operation
Replace the retractorwhen both pulling out(for shoulder belt)and retracting belt
Defective driving deviceTry to move the slide
or problem in electricalanchor in both directions
circuit
by handIf the slide anchor does
not move:
Replace the driving
device assemblyIf the slide anchor moves:
Check using check
charts No. 1, 3 and 5

23-20BODY - Troubleshooting
CHECKING CIRCUITIndex of Check Chart
Chart No.Circuit name
1Control unit power supply and ground circuit
2Warning light, key reminder switch, buzzer circuit
3Release switch (driver’s side), buckle switch, outer switch circuit
4Door latch switch, fasten switch, release switch (passenger’s side) circuit
5Motor power supply and drive circuit
1. Control Unit Power Supply and Ground Circuit
Page No.
23-20
23-2 1
23-23
23-25
23-28IGNITION
SWITCH
,\--AUTOMATIC
SEAT BELT
CONTROL UNIT
Step
1
2
3Check method
Operation
Unplug the
connector from
the control unit
Ignition switch:
ONignition switch:
OFFCheck object
Harness side
terminal voltage
of control unit
connector
(I 1 -Ground)
Harness side
terminal voltage
of control unit
connector
(1 -Ground)
Terminal-to-ground continuity
of control unit
harness side
connector
(7-Ground,17-Ground)
TJudgement
NormalMalfunction
System voltage0 VCauseOpen harness wire
or disconnected
connector between
junction block and
control unitRemedy
Repair the harness
or plug in the
connector correctly
System voltage
0 V
Open harness wire
or disconnected
connector between
junction block and
control unitRepair the harness
or plug in the
connector correctly
00allOpen harness wire
between control
unit and groundRepair the harness
Improper groundCorrectly connect
connectionto ground