1996 TOYOTA TERCEL ECM

P19552
TOYOTA Hand-Held Tester
DLC3
P20392
SF1PR-02
P20176
P20391
- MFIFUEL PUMP
MF-5
529 Author
: Date
:
1996 TERCEL (RM440U)
FUEL PUMP
ON-VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand-held tester to the DLC3.
(c) Turn the ignition switch ON and TOYOTA hand-held tes-
ter main switch ON.
NOTICE:
Do not start the engine.
(d) Select the active test mode on the TOYOTA hand-held
tester.
(e) Please refer to the TOYOTA hand-held tester operator's
manual for further details.
If you have no TOYOTA hand-held tester, connect the positive
(+) and negative (-) leads from the battery to the fuel pump con-
nector (See step 6).
(f) Check that there is pressure in the fuel inlet hose from the
fuel filter.
HINT:
If there is fuel pressure, you will hear the sound of fuel flowing.
If there is no pressure, check the fusible link, H-fuse, fuses, EFI
main relay, circuit opening relay, fuel pump, ECM and wiring
connections.
2. CHECK FUEL PRESSURE
(a) Check the battery positive voltage is above 11 V.
(b) Disconnect the negative (-) terminal cable from the bat-
tery.
(c) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet hose from the fuel filter outlet.
CAUTION:
Put a shop towel under the fuel filter.Slowly loosen the
union bolt.

SF0X0-03
MF-16
- MFIINJECTOR
540 Author
: Date
:
1996 TERCEL (RM440U)
INJECTOR
ON-VEHICLE INSPECTION
1. INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(1) With the engine running or cranking, use a sound
scope to check that there is a normal operating
noise in proportion to engine speed.
(2) If you have no sound scope, you can check the
injector transmission operation with your finger.
If no sound or unusual sound is heard, check the wiring connec-
tor, injector or injection signal from the ECM.
2. INSPECT INJECTOR RESISTANCE
(a) Disconnect the injector connector.
(b) Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
13.4 - 14.2 W at 20°C (68°F)
If the resistance is not as specified, replace the injector.
(c) Reconnect the injector connector.

SF199-02
- MFIIDLE AIR CONTROL (IAC) VALVE
MF-33
557 Author
: Date
:
1996 TERCEL (RM440U)
IDLE AIR CONTROL (IAC) VALVE
ON-VEHICLE INSPECTION
1. INSPECT IAC VALVE OPERATION
(a) Initial conditions:

Engine at normal operating temperature

Idle speed set correctly

Transmission in neutral position
(b) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843-18020
(c) After engine rpm is kept at 900 - 1,300 rpm for 5 seconds,
check that it returns to idle speed.
If the rpm operation is not as specified, check the IAC valve, wir-
ing and ECM.
(d) Remove the SST from the DLC1.
SST 09843-18020
2. INSPECT IAC VALVE RESISTANCE
NOTICE:
ºColdº and ºHotº in the following sentences express the temper-
ature of the coils themselves. ºColdº is from -10°C (14°F) to 50°C
(122°F) and ºHotº is from 50°C (122°F) to 100°C (212°F).
(a) Disconnect the IAC valve connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal +B and other terminals (RSC, RSO).
Resistance:
Cold17.0 - 24.5 W
Hot21.5 - 28.5 W
If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.

SF0WP-03
Z19295
Voltmeter
ECMVacuum
PIM
E2
Voltage Drop:
Applied
Vacuum
kPa
mmHg
in.Hg
Vo l t a ge
drop V13.3
100
3.94
0.3 - 0.5
26.7 40.0 53.5 66.7
200
7.87
300
11.81400
15.75500
19.69
0.7 - 0.9 1.1 - 1.3 1.5 - 1.7 1.9 - 2.1 MF-48
- MFIMANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
1996 TERCEL (RM440U)
INSPECTION
1. INSPECT POWER SOURCE VOLTAGE OF MAP SEN-
SOR
(a) Disconnect the MAP sensor connector.
(b) Turn the ignition switch ON.
(c) Using a voltmeter, measure the voltage between connec-
tor terminals VC and E2 of the wiring harness side.
Voltage: 4.5 - 5.5 V
(d) Turn the ignition switch to LOCK.
(e) Reconnect the MAP sensor connector.
2. INSPECT POWER OUTPUT OF MAP SENSOR
(a) Turn the ignition switch ON.
(b) Disconnect the vacuum hose from the MAP sensor.
(c) Connect a voltmeter to terminals PIM and E2 of the ECM,
and measure the output voltage under ambient atmo-
spheric pressure.
(d) Apply vacuum to the MAP sensor in 13.3 kPa (100 mmHg,
3.94 in.Hg) segments to 66.7 kPa (500 mmHg, 19.69
in.Hg).
(e) Measure the voltage drop from step (c) above for each
segment.
(f) Reconnect the vacuum hose to the MAP sensor.

SF0WI-05
MF-54
- MFIENGINE CONTROL MODULE (ECM)
578 Author
: Date
:
1996 TERCEL (RM440U)
ENGINE CONTROL MODULE (ECM)
COMPONENTS

SF0WJ-01
- MFIENGINE CONTROL MODULE (ECM)
MF-55
1996 TERCEL (RM440U)
INSPECTION
1. REMOVE ECM
2. INSPECT ECM (See page DI-17)
3. REINSTALL ECM

IG08E-06
CHECK POWER SUPPLY TO IGNITION COIL
AND IGNITER
SPARK TEST
Replace the camshaft position sensor.
CHECK RESISTANCE OF HIGH-TENSION
CORD (See step 2)
Maximum resistance: 25 kW per cord
CHECK RESISTANCE OF IGNITION COIL
(See step 4) 1. Turn ignition switch to ON.
2. Check that there is battery voltage at
ignition coil positive (+) terminal.
CHECK CONNECTION OF IGNITION COIL IGNITER
Resistance: Cold Hot
Secondary
9.3 - 16.0 kW
11.7 - 18.8 kW
CHECK RESISTANCE OF CAMSHAFT POSITION SENSOR
(See step 5)
Resistance:Cold Hot
985 - 1,600 W1,265 - 1,890 W
CHECK IGT SIGNAL FROM ECM
(See page
DI-84)
CHECK RESISTANCE OF CRANKSHAFT POSITION SENSOR
(See step 6)
Resistance:Cold
Hot
TRY ANOTHER IGNITERReplace the crankshaft position sensor. Replace the ignition coil. Connect securely.
Replace the cord(s).
Check wiring between ignition switch
to ignition coil and igniter.
Check wiring between ECM, distributor
and igniter, and then try another ECM.
NO
OK OK
OK
OK
OK
OKBAD
BAD
BAD
BAD
BAD
BAD
BAD
Primary
0.67 - 1.05 kW0.85 - 1.23 kW
985 - 1,600 W1,265 - 1,890 W
- IGNITIONIGNITION SYSTEM
IG-1
632 Author
: Date
:
1996 TERCEL (RM440U)
IGNITION SYSTEM
ON-VEHICLE INSPECTION
NOTICE:
ºColdº and ºHotº in following sentences express the tem-
perature of the coils themselves. ºColdº is from -10°C
(14°F) to 50°C (122°F) and ºHotº is from 50°C (122°F) to
100°C (212°F).
1. INSPECT SPARK TEST
Check that the spark occurs.
(1) Disconnect the high-tension cord from the spark
plug.
(2) Remove the spark plugs.
(3) Install the spark plugs to the high-tension cord.
(4) Ground the spark plug.
(5) See if spark occurs while engine is being cranked.
NOTICE:
To prevent gasoline from being injected from injectors dur-
ing this test, crank the engine for no more than 5 - 10 se-
conds at time. If the spark done not occur, do the test as fol-
lows:

BE-6
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1996 TERCEL (RM440U) Washer fluid does not operate.
1. Washer Hose and Nozzle-

At wiper switch HI position, the wiper blade is in contact with the
body.

When the wiper switch is OFF, the wiper blade does not retract
or the retract position is wrong.
1. *1 Wiper Switch
2. Wire harnessBE-30
-
*1: Inspect wiper arm and blade set position
COMBINATION METER (METER, GAUGES AND ILLUMINATION)
TroubleParts nameSee page
Tachometer, Fuel Gauge and Engine Coolant Temperature Gauge
do not operate.3. GAUGE Fuse (Engine Room R/B)
4. Meter Circuit
5. Wire Harness-
BE-35
-
Speedometer does not operate.
1. Vehicle Speed Sensor
2. Meter Circuit
3. Wire HarnessBE-38
BE-35
-
Tachometer does not operate.
1. Igniter
2. ECM
3. Meter Circuit
4. Wire Harness-
-
BE-35
-
Fuel Gauge does not operate or operate abnormally.
1. Fuel Receiver Gauge
2. Fuel Sender Gauge
3. Meter Circuit
4. Wire HarnessBE-38
BE-38
BE-35
-
Engine Coolant Temperature Gauge does not operate or operate
abnormally.
1. Engine Coolant Temperature Receiver Gauge
2. Engine Coolant Temperature Sender Gauge
3. Meter Circuit
4. Wire HarnessBE-38
BE-38
BE-35
-
All illumination lights do not light up.
1. TAIL Fuse (I/P J/B)
2. Light Control Rheostat
3. Meter Circuit
4. Wire Harness-
BE-38
BE-35
-
Only one illumination light does not light up.1. Bulb
2. Meter Circuit-
BE-35
COMBINATION METER (WARNING LIGHTS)
TroubleParts nameSee page
Warning lights do not light up.
(Except Discharge, SRS and Door Open)
1. Bulb
2. GAUGE Fuse (I/P J/B)
3. Ignition Switch
4. Meter Circuit
5. Wire Harness-
-
BE-1 1
BE-35
-
Brake Warning Light does not light up.
1. Bulb
2. Brake Fluid Level Warning Switch
3. Parking Brake Switch
4. Bulb Check Relay
5. Meter Circuit
6. Wire Harness-
BE-38
BE-38
-
BE-35
-
Seat Belt Warning Light does not light up.
1. Bulb
2. Seat Belt Retractor Switch
3. Integration Relay
4. Meter Circuit
5. Wire Harness-
BE-38
BE-38
BE-35
-