1996 TOYOTA TERCEL throttle body

IN-34
- INTRODUCTIONTERMS
34 Author
: Date
:
1996 TERCEL (RM440U) NA
Natural Aspiration
No.Number
O/DOverdrive
OEMOriginal Equipment Manufacturing
OHCOverhead Camshaft
OHVOverhead Valve
OPTOption
O/SOversize
P & BVProportioning And Bypass Valve
PCSPower Control System
PCVPositive Crankcase Ventilation
PKBParking Brake
PPSProgressive Power Steering
PSPower Steering
PTOPower Take-Of f
R & PRack And Pinion
R/BRelay Block
RBSRecirculating Ball Type Steering
R/FReinforcement
RFSRigid Front Suspension
RHRight-Hand
RHDRight-Hand Drive
RLYRelay
ROMRead Only Memory
RrRear
RRRear-Engine Rear-Wheel Drive
RRSRigid Rear Suspension
RWDRear-Wheel Drive
SDNSedan
SENSensor
SICSStarting Injection Control System
SMTSequential Manual Transmission
SOCState Of Charge
SOHCSingle Overhead Camshaft
SPECSpecification
SPISingle Point Injection
SRSSupplemental Restraint System
SSMSpecial Service Materials
SSTSpecial Service Tools
STDStandard
STJCold-Start Fuel Injection
SWSwitch
SYSSystem
T/ATransaxle
TACHTachometer
TBIThrottle Body Electronic Fuel Injection

- INTRODUCTIONTERMS
IN-37
1996 TERCEL (RM440U) HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module-
IFIIndirect Fuel InjectionIndirect Injection (IDL)
IFSInertia Fuel-Shutoff-
ISCIdle Speed Control-
KSKnock SensorKnock Sensor
MAFMass Air FlowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure
Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure-
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Lamp
MSTManifold Surface Temperature-
MVZManifold Vacuum Zone-
NVRAMNon-V olatile Random Access Memory-
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn-Board DiagnosticOn-Board Diagnostic System (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Convert (OC), CCo
OPOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module-
PNPPark/Neutral Position-
PROMProgrammable Read Only Memory-
PSPPower Steering Pressure-
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module-
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger BypassE-ABV
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter-
SRIService Reminder Indicator-
SRTSystem Readiness Test-
STScan Tool-
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter

PP18X-01
- PREPARATIONMFI
PP-13
1996 TERCEL (RM440U)
EQUIPMENT
Carburetor cleaner
OBD II scan tool
Soft brushThrottle body
Sound scopeInjector
Thermometer
Torque wrench
Vacuum gauge

SS0N7-04
- SERVICE SPECIFICATIONSMFI
SS-1 1
141 Author
: Date
:
1996 TERCEL (RM440U)
MFI
SERVICE DATA
Fuel pressure
regulatorFuel pressure at no vacuum281 - 287 kPa (2.87 - 2.93 kgf/cm2, 40.8 - 41.7 psi)
Fuel pumpResistance at 20°C (68°F)0.2 - 3.0 W
InjectorResistance at 20°C (68°F)
Injection volume
Difference between each cylinder
Fuel leakage13.4 - 14.2 W
39 - 49 cm3 (2.4 - 3.0 cu in.) per 15 sec.
5 cm3 (0.31 cu in.) or less
1 drop or less per 3 min.
Throttle bodyThrottle body fully closed angle6°
Throttle position
sensorResistance
0 mm (0 in.) VTA - E2
0.50 mm (0.020 in.)IDL - E2
0.70 mm (0.028 in.)IDL - E2
Throttle valve fully open VTA - E2
- VC - E2
0.2 - 5.7 kW
2.3 kW or less
Infinity
2.0 - 10.2 kW
2.5 - 5.9 kW
IAC valveResistance +B - RSO (or RSC)
Cold (-10°C (14°F) to 50°C (122°F))
Hot (50°C (122°F) to 100°C (212°F))
17.0 - 24.5 W
21.5 - 28.5 W
VSV for EGRResistance at 20°C (68°F)33 - 39 W
ECT sensor and
IAT sensorResistance at -20°C (-4°F)
at 0°C (32°F)
at 20°C (68°F)
at 40°C (104°F)
at 60°C (140°F)
at 80°C (176°F)10 - 20 kW
4 - 7 kW
2 - 3 kW
0.9 - 1.3 kW
0.4 - 0.7 kW
0.2 - 0.4 kW
MAP sensorPower source voltage4.5 - 5.5 V
Main heated
oxygen sensorHeater coil resistance at 20°C (68°F)11 - 16 W
Sub heated
oxygen sensorHeater coil resistance at 20°C (68°F)11 - 16 W
Fuel cut rpmFuel return rpm900 rpm

SS0N8-03
SS-12
- SERVICE SPECIFICATIONSMFI
1996 TERCEL (RM440U)
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
Fuel line Union bolt type
Flare nut type29
30290
30022
23
Fuel inlet hose x Fuel filter2929022
Fuel outlet pipe x Fuel pump bracket2929022
Fuel tank x Fuel pump set bolt3.43530 in.´lbf
Fuel pressure regulator x Delivery pipe8.08069 in.´lbf
Fuel return pipe x Delivery pipe8.08069 in.´lbf
Fuel return pipe x Fuel pressure regulator2020014
Delivery pipe x Cylinder head1919014
Fuel inlet hose x Delivery pipe3030023
Fuel pump bracket x Fuel cut-off valve1.51513 in.´lbf
Fuel tank x Fuel tank filler pipe3.43530 in.´lbf
Fuel tank x Body3334025
Throttle body x Intake manifold19.519514
Main heated oxygen sensor x Exhaust manifold4444032
Sub heated oxygen sensor x Exhaust pipe4444032
Knock sensor x Cylinder block4545033

P24296
Throttle Position
Sensor
E2 VTAECM
VC
- DIAGNOSTICSENGINE
DI-33
1996 TERCEL (RM440U)
DTC P0120 Throttle/Pedal Position Sensor/Switch ºAº
Circuit Malfunction
CIRCUIT DESCRIPTION
The throttle position sensor is mounted in the throttle body and
detects the throttle valve opening angle. When the throttle valve
is fully closed, a voltage of approximately 0.3 - 0.8 V is applied
to terminal VTA of the ECM. The voltage applied to the terminal
VTA of the ECM increases in proportion to the opening angle
of the throttle valve and becomes approximately 3.2 - 4.9 V
when the throttle valve is fully opened. The ECM judges the ve-
hicle driving conditions from these signals input from terminal
VTA and uses them as one of the conditions for deciding the
air-fuel ratio correction, power increases correction and fuel-
cut control etc.
DTC No.DTC Detection ConditionTrouble Area
P0120
Condition (a) or (b) continues:
(a) VTA < 0.1 V
(b) VTA > 4.9 V
Open or short in throttle position sensor circuit

Throttle position sensor

ECM
HINT:
After confirming DTC P0120, use the OBD II scan tool or TOYOTA hand-held tester to confirm the throttle
valve opening percentage.
Throttle valve opening position expressed as percentageTblAThrottle valve fully closedThrottle valve fully openTrouble Area
0 %0 %VC line open
VTA line open or short
100 %100 %E2 line open
DI1E8-08

A00369
1 (+) ON
S03529 BE6653A00854
ON
VTA (+) E2 (-)
- DIAGNOSTICSENGINE
DI-35
1996 TERCEL (RM440U)
2 Check voltage between terminal 1 of wire harness side connector and body
ground.
PREPARATION:
(a) Disconnect the throttle position sensor connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal 1 of wire harness side
connector and the body ground.
OK:
Voltage: 4.5 - 5.5 V
NG Go to step 5.
OK
3 Check throttle position sensor (See page MF-26).
NG Replace throttle position sensor.
OK
4 Check voltage between terminals VTA and E2 of ECM connector.
PREPARATION:
(a) Remove the lower finish panel.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals VTA and E2 of the ECM
connector.
OK:
Throttle ValveVoltage
Fully closed0.3 - 1.0 V
Fully open3.2 - 4.9 V
NG Check for open and short in harness and con-
nector between ECM and throttle position sen-
sor (VTA or E2 line) (See page IN-26).
OK

A15714
A15715
DI-78
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
DTC P0505 Idle Control System Malfunction
CIRCUIT DESCRIPTION
The rotary solenoid type IAC valve is located on the throttle
body and intake air bypassing the throttle valve is directed to
the IAC valve through a passage.
In this way the intake air volume bypassing the throttle valve is
regulated, controlling the engine speed.
The ECM operates only the IAC valve to perform idle-up and
provide feedback for the target idling speed.
DTC No.DTC Detection ConditionTrouble Area
P0505Idle speed continues to vary greatly from the target speed
(2 trip detection logic)

IAC valve is stuck or closed

Open or short in IAC valve circuit

Open or short A/C 1 signal circuit

Air intake (hose loose)
WIRING DIAGRAM
DI4LK-02