1996 TOYOTA TERCEL warning

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

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

DI4N3-01
Details of Problem
The theft deterrent system cannot be set
Inspecting Circuit*1See page
DI-224 1. Indicator light circuit
4. Door courtesy switch circuit
5. Door unlock detection switch circuit
6. Engine hood courtesy switch circuit
The indicator light does not blink when system is setIndicator light circuit
When the
system is
set
When the rear door is unlocked
When the luggage compartment door is opened
by a method other than the key2. Luggage compartment door key
lock and unlock switch circuit
3. Luggage compartment door
courtesy switch circuit
When the engine hood is opened
The system
does not
operateDoor unlock detection switch circuit
Luggage compartment door
courtesy switch circuit
Engine hood courtesy switch circuit
While the system is
in warning operation
Horns do not sound
Theft deterrent horn does not sound
Headlights do not flash
Taillights do not flash
The starter cut is not cut off
The rear door lock is not locked in unlock conditionHorn relay circuit
Theft deterrent horn circuit
Headlight control relay circuit
Taillight control relay circuit
Starter relay circuit
Door unlock detection switch circuit
It is not canceled when the ignition key is turned to
ACC or ON position
It still operates when the luggage compartment door is
opened with the key When the
system is
setIgnition switch circuit
Luggage compartment door key
lock and unlock switch circuit
System is still set even when a rear door is open Door courtesy switch circuit
Even when the
system is not
setHorns sound
Theft deterrent horn sounds
Headlights stay on
Taillights stay onHorn relay circuit
Theft deterrent horn circuit
Headlight control relay circuit
Taillight control relay circuit
DI-241
DI-239
DI-244
DI-213
DI-246
DI-224
DI-213
DI-239
DI-246
DI-231
DI-228
DI-233
DI-235
DI-226
DI-213
DI-237
DI-241
DI-244
DI-231
DI-228
DI-233
DI-235
*1: If numbers are given to the circuit, proceed with troubleshooting in the order indicated by those numbers.
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-223
1996 TERCEL (RM440U)
PROBLEM SYMPTOMS TABLE
Proceed to the reference page shown in the matrix chart below for each malfunction symptom and trouble-
shoot for each circuit.
HINT:
Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is
operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that
the door lock control system is operating normally.

N20823
BatteryMAIN FL2
F61
F7B-R B
Fusible Link
Block2
EA2B-R 2 2AM1
W-G 2 1
1B
1J W-G2Ignition Switch
3
B-Y4
1BCIG & RAD1
1DGRTheft Deterrent ECU
8
T3
ACC
I10Instrument Panel
Junction Block
Instrument Panel
Junction BlockACC
AM1
ALT
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-237
1996 TERCEL (RM440U)
Ignition Switch Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery positive voltage is applied to the terminal ACC
of the ECU. Also, if the ignition switch is turned to the ON position, battery positive voltage is applied to the
terminals ACC and IG of the ECU. When the battery positive voltage is applied to the terminal ACC of the
ECU while the theft deterrent system is activated, the warning stops. Furthermore, power supplied from the
terminals ACC and IG of the ECU is used as power for the door courtesy switch, and position switch, etc.
WIRING DIAGRAM
DI4NA-02

- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-245
1996 TERCEL (RM440U)
INSPECTION PROCEDURE
1 Check operation of open door warning light.
CHECK:
Check that open door warning light comes on when each door is opened, and goes off when all doors are
closed.
NG Check and repair open door warning light cir-
cuit.
OK
2 Check for open in harness and connector between theft deterrent ECU and door
courtesy switch (See page IN-26).
OK Check and replace theft deterrent ECU.*1
NG
Repair or replace harness or connector.
*1: When there is a malfunction that the theft deterrent system cannot be set, proceed to the next numbered
circuit inspection shown on matrix chart (See page DI-223).

N00280
DENSO
Borroughs
CH0087
CORRECTWRONG WRONG
P13685
CH0732
Disconnect Wire
from Terminal B
Generator
Voltmeter BatteryAmmeter
B
- CHARGINGCHARGING SYSTEM
CH-3
1996 TERCEL (RM440U)
(b) Using a belt tension gauge, check the drive belt tension.
Belt tension gauge:
DENSO BTG-20 (95506-00020)
Borroughs No. BT-33-73F
Drive belt tension:
New belt
Used belt160 ± 20 lbf
100 ± 20 lbf
If the belt tension is not as specified, adjust it.
HINT:

ºNew beltº refers to a belt which has been used less than
5 minutes on a running engine.

ºUsed beltº refers to a belt which has been used on a run-
ning engine for 5 minutes or more.

After installing a belt, check that it fits properly in the
ribbed grooved.

Check by hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.

After installing a new belt, run the engine for about 5 min-
utes and recheck the belt tension.
4. VISUALLY CHECK GENERATOR WIRING AND
LISTEN FOR ABNORMAL NOISES
(a) Check that the wiring is in good condition.
(b) Check that there is no abnormal noise from the generator
while the engine is running.
5. INSPECT CHARGE WARNING LIGHT CIRCUIT
(a) Warm up the engine and then turn it off.
(b) Turn off all accessories.
(c) Turn the ignition switch ºONº. Check that the charge warn-
ing light is lit.
(d) Start the engine. Check that the light goes off.
If the light does not go off as specified, troubleshoot the charge
light circuit.
6. INSPECT CHARGING CIRCUIT WITHOUT LOAD
HINT:
If a battery/generator tester is available, connect the tester to
the charging circuit as per manufacturer's instructions.
(a) If a tester is not available, connect a voltmeter and amme-
ter to the charging circuit as follows:

Disconnect the wire from terminal B of the generator
and connect it to the negative (-) tester probe of the
ammeter.

BR0RE-01
BR5042
SST
BR5041
BR-10
- BRAKEBRAKE MASTER CYLINDER
1996 TERCEL (RM440U)
REMOVAL
1. REMOVE AIR CLEANER ASSEMBLY
2. DISCONNECT LEVEL WARNING SWITCH CONNEC-
TOR
3. DRAW OUT FLUID WITH SYRINGE
NOTICE:
Do not let brake fluid remain on a painted surface. Wash it
off immediately.
4. DISCONNECT BRAKE LINES
Using SST, disconnect the brake lines from the master cylinder.
SST 09751-3601 1
Torque: 15 N´m (155 kgf´cm, 11 ft´lbf)
5. REMOVE MASTER CYLINDER
(a) w/o ABS:
Remove the 2 mounting nuts, clamp and pull out the mas-
ter cylinder and gasket.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
(b) w/ ABS:
Remove the 2 mounting nuts, 2-way and pull out the
master cylinder and gasket.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)

SR17T-02
- STEERINGNON-TIL T STEERING COLUMN
SR-17
1996 TERCEL (RM440U)
INSPECTION
NOTICE:
When using a vise do not overtighten it.
1. INSPECT STEERING LOCK OPERATION
Check that the steering lock mechanism operates properly.
2. IF NECESSARY, REPLACE KEY CYLINDER
(a) Place the ignition key at the ACC position.
(b) Push down the stop pin with a thin rod, and pull out the
key cylinder.
(c) Install a new cylinder.
HINT:
Make sure the ignition key is at the ACC position.
3. INSPECT IGNITION SWITCH (See page BE-1 1)
4. IF NECESSARY, REPLACE IGNITION SWITCH
(a) Remove the 2 screws.
(b) Install a new ignition switch with the 2 screws.
5. INSPECT KEY UNLOCK WARNING SWITCH
(See page BE-1 1)
6. IF NECESSARY, REPLACE KEY UNLOCK WARNING
SWITCH
(a) Remove the 2 screws.
(b) Install a new switch with the 2 screws.
7. A/T:
INSPECT KEY INTERLOCK SOLENOID
A132L A/T: (See page AX-24)
A242L A/T: (See page AX-28)
8. A/T:
IF NECESSARY, REPLACE KEY INTERLOCK SOLE-
NOID
(a) Remove the 2 screws.
(b) Install a new solenoid with the 2 screws.
9. INSPECT BEARING
Check the bearing rotation condition and check for abnormal
noise.
If the bearing is worn or damaged, replace the column tube.