1996 TOYOTA TERCEL cylinder

N12884
Theft Deterrent ECU
Door Key Lock and Unlock Switch
Driver's
J6
JUNCTION
CONNECTORID110
W-B
AID1
D6 (10)
T4 22
LOCK
UNLOCK
AA W-B
W-B
J3
JUNCTION
CONNECTOR2R-Y9
IH111
IH110 ID18
IH1 12
A
ALOCK
UNLOCK Door Key Lock and Unlock Switch
Passenger's
(G-Y) R-W
G-W
R-WW-LW-L
(R-W) W-G
(R-Y)
D6(9)
T46
D6 (11)
T4 16L2
(L1)
UL3
UL2
(UL1) W-G 3
1
3
1 2
IE
( ): w/o Theft Deterrent System W-B
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-209
1996 TERCEL (RM440U)
Door Key Lock and Unlock Switch Circuit
CIRCUIT DESCRIPTION
The door key lock and unlock switch is built in the door key cylinder. When the key is turned to the lock side,
terminal 3 of the switch is grounded and when the key is turned to the unlock side, terminal 1 of the switch
is grounded.
WIRING DIAGRAM
DI4MV-02

I10187
IEW-B
1 Key Unlock Warning Switch
2
LGT420
KSW Theft Deterrent ECU
N14675SR4824
I09773
2
1
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-21 1
1996 TERCEL (RM440U)
Key Unlock Warning Switch Circuit
CIRCUIT DESCRIPTION
The key unlock warning switch goes on when the ignition key is inserted in the key cylinder and goes off when
the ignition key is removed.
The ECU operates the key confinement prevention function while the key unlock warning switch is on.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check key unlock warning switch.
PREPARATION:
Disconnect key unlock warning switch connector.
CHECK:
Check continuity between terminals 1 and 2 of key unlock warn-
ing switch connector, when the key is inserted to the key cylin-
der or removed.
OK:
Switch positionTester connectionSpecified condition
ON (Key inserted)1 - 2Continuity
OFF (Key removed)-No continuity
NG Replace key unlock warning switch.
OK
DI4MW-02

DI4MZ-01
THEFT DETERRENT SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Weather Conditions
When Problem
Occurred Frequency Problem OccursWeather
Outdoor temperature
/ /

Constant
Sometimes ( Times per day, month)

Once only Brought in

Theft deterrent system cannot be set.

Indicator light does not flash when the theft deterrent system is set.
(It stays on or does not light at all.)

Theft deterrent system
does not operate.
When unlocked using the
door lock knob.

When the engine hood is
opened.

System cannot be
canceled once set.
When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.
(However, only when the system has never operated)

When the luggage compartment door is opened with the key.

System cannot be
canceled during warning
operation.
When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.

Warning operation starts when the system is set and the door or luggage compartment door is opened with
the key.

Others.
Date Problem First Occurred

Fine
Cloudy
Rainy
Snowy

Various/Others

Hot
Warm
Cool

Cold (Approx. 5F ( 5C))
Problem Symptom
Malfunction

Horns only

Theft deterrent horn only

Headlights only

Taillights only

Starter cut only

Door lock operation only
DI-216
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1996 TERCEL (RM440U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI4N0-02
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-217
1996 TERCEL (RM440U)
PRE-CHECK
1. SETTING OF THE THEFT DETERRENT SYSTEM
Setting Conditions
(a) Close all the doors.
(b) Close the engine hood and luggage compartment door.
(c) Remove the ignition key from the ignition key cylinder.
Setting Operation
When any of the following operations (a), (b) or (c) is performed, the theft deterrent indicator light will light
up as described.
(1) Lock the left or right front door using the key
(All doors are locked by key-interlinked lock operation).
(2) Lock all the doors using the wireless door lock control system.
(3) With the rear doors locked and with one of the front doors locked, lock the other front door without
using the key (keyless door lock).
Elapsed time after operationIndicator light
Within about 30 secondsLight up
After about 30 secondsBlinks *1
*1: 1 sec. or, 1 sec. off
HINT:
When the theft deterrent system is set, doors cannot be locked or unlocked with the door lock control switch
and the luggage compartment door cannot be unlocked with the luggage compartment door opener switch.
2. CANCELING OF THE THEFT DETERRENT SYSTEM IN THE SET CONDITION
Check if the theft deterrent indicator light is blinking.
Canceling Operation
When any of the following operations (a), (b), (c) or (d) is performed, the theft deterrent system is canceled
and indicator light will go off.
Condition
(1) Unlock the left or right front door using the key.
(2) Unlock all the doors using the wireless door lock control system.
(3) Insert the ignition key in the ignition key cylinder and turn it to the ACC or ON position
(This is operative only when the theft deterrent system has never operated).
(4) Unlock the luggage compartment door with the key. *1
*1: The theft deterrent system is temporarily canceled only while the luggage compartment door is open.
Approximately 2 seconds after the luggage compartment door is closed, the theft deterrent system is reset.
3. CHECK OF THE THEFT DETERRENT SYSTEM OPERATION
Check if the theft deterrent indicator light is blinking.
When any of the following operations (a) or (b) is performed, the system sounds the horns and theft deterrent
horn and flashes the headlights and taillights for about one minute to alert. At the same time, the system
disconnects the starter motor circuit and locks all doors (if all doors are not locked, the system repeats door
locking operation every 2 seconds during the one minute alert time).
(1) Open the engine hood using the engine hood opener lever.
(2) Unlock any of the front or rear doors without key operation.

N09348
ECUTOYOTA hand-held tester
TOYOTA Break-out-box
Interfece
Box DI-218
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1996 TERCEL (RM440U)
4. CANCELLING OF THE THEFT DETERRENT SYSTEM IN OPERATING CONDITION
The theft deterrent operation can be canceled when any of the following conditions is met:
No.ConditionCanceling Operation
1Unlock left or right door with the key.

2Unlock doors with wireless door lock control system.

3Insert key into ignition key cylinder and turn it to ACC or ON
position.

4About 1 minute passes after theft deterrent operation be-
gins.Automatic stop *1
*1: In this case the theft deterrent system resets after about 2 seconds if all doors are closed.
5. ECU TERMINAL VOLTAGE MEASUREMENT BY US-
ING TOYOTA BREAK- OUT- BOX AND TOYOTA
HAND-HELD TESTER
(a) Hook up the TOYOTA break- out- box and TOYOTA
hand-held tester to the vehicle.
(b) Read the ECU input/output values by following the
prompts on the tester screen. Please refer to the TOYO-
TA break-out-box operator's manual.
HINT:
TOYOTA hand-held tester has a ºSnapshotº function. This re-
cords the measured data and is effective in the diagnosis of in-
termittent problems.

DI-222
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1996 TERCEL (RM440U)
B15A4LSWDE
Door unlock detection switch ºONº.
(Driver's)Below 1 W
B15 e A4LSWD e EDoor unlock detection switch ºOFFº.
(Driver's)1 MW or higher
B16A4UL2E
Door key lock and unlock switch ºUNLOCKº.
(Passenger's)Below 1 W
B16 e A4UL2 e EDoor key lock and unlock switch ºOFFº or ºLOCKº.
(Passenger's)1 MW or higher
B19A4DSWPEDoor courtesy switch ºONº. (Passenger's)Below 1 WB19 eA4DSWP e EDoor courtesy switch ºOFFº. (Passenger's)1 MW or higher
B20 eA4KSW e E
Key unlock warning switch ºONº.
(Key is inserted into key cylinder)Below 1 WB20 eA4KSW e E
Key unlock warning switch ºOFFº.1 MW or higher
B21A4LSWPEDoor unlock detection switch ºOFFº. (Passenger's)Below 1 WB21 e A4LSWP e EDoor unlock detection switch ºONº. (Passenger's)1 MW or higher
B22A4L2E
Door key lock and unlock switch ºLOCKº.
(Driver's)Below 1 W
B22 e A4L2 e EDoor key lock and unlock switch ºOFFº or ºUNLOCKº.
(Driver's)1 MW or higher
B23 - A4TALL e ELight control switch ºOFFº.10 - 14 V
B24 - A48HORN e EHorn switch ºOFFº.10 - 14 V
B25 - A4SRLY e EIgnition switch is turned to ºSTº.
(When park / neutral position switch ºPº position)10 - 14 V

N12895
BG BH
W-B W-B 1Luggage Compartment
Door Key Lock and Unlock SwitchL4
2
LIE29
LT49
LUG Theft Deterrent ECU
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-241
1996 TERCEL (RM440U)
Luggage Compartment Door Key Lock and Unlock Switch
Circuit
CIRCUIT DESCRIPTION
The luggage compartment door key lock and unlock switch goes on when the luggage compartment door
key cylinder is turned to the unlock side with the key.
WIRING DIAGRAM
DI4NC-01

EM0KB-06
- ENGINE MECHANICALCOMPRESSION
EM-3
424 Author
: Date
:
1996 TERCEL (RM440U)
COMPRESSION
INSPECTION
HINT:
If there is lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1. WARM UP AND STOP ENGINE
Allow the engine to warm up to normal operating temperature.
2. REMOVE SPARK PLUGS (See page IG-1)
3. CHECK CYLINDER COMPRESSION PRESSURE
(a) Insert a compression gauge into the spark plug hole.
(b) Fully open the throttle.
(c) While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain engine revolutions
of 250 rpm or more.
(d) Repeat steps (a) through (c) for each cylinder.
NOTICE:
This measurement must be done in as short a time as pos-
sible.
Compression pressure:
1,275 kPa (13.0 kgf/cm
2, 185 psi) or more
Minimum pressure:
980 kPa (10.0 kgf/cm
2, 142 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/cm
2, 14 psi) or less
(e) If the cylinder compression in one or more cylinders is low,
pour a small amount of engine oil into the cylinder through
the spark plug hole and repeat steps (a) through (c) for
cylinders with low compression.

If adding oil helps the compression, chances are
that the piston rings and/or cylinder bore are worn
or damage.

If pressure stays low, a valve may be sticking or
seating is improper, or there may be leakage past
the gasket.
4. REINSTALL SPARK PLUGS