1996 TOYOTA TERCEL throttle position sensor

DTC No.
Indicates the diagnostic trouble code.

Page or Instructions
Indicates the page where the inspection procedure
for each circuit is to be found, or gives instructions
for checking and repairs.

Detection Item
Indicates the system of the problem or
contents of the problem.
Trouble Area
Indicates the suspect area of the
problem.
Mass Air Flow Circuit MalfunctionDetection Item

Open or short in mass air flow meter circuit

Mass air flow meter

ECM DTC No.
(See page)Trouble AreaMIL* MemoryP0100
(DI-24)
P0101
(DI-28)
P0115
(DI-33)
Open or short in intake air temp. sensor
circuit

Intake air temp. sensor

ECM Intake Air Temp. Circuit
Malfunction P0110
(DI-29)

Open or short in engine coolant temp. sensor circuit

Engine coolant temp. sensor

ECM
Throttle/ Pedal Position Sensor/Switch
ºAº Circuit MalfunctionEngine Coolant Temp.
Circuit Malfunction

Open or short in throttle position sensor circuit

Throttle position sensor

ECM
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument or other
factors.
If a malfunction code is displayed during the DTC check mode, check the circuit for the code listed in the table
below. For details of each code, turn to the page referred to under the ºSee pageº for the respective ºDTC No.º
in the DTC chart.
Mass Air Flow Circuit
Range/ Performance Problem
Mass air flow meter

Throttle position sensor Throttle/ Pedal Position Sensor/ Switch
ºAº Circuit Range / Performance Prob-
lem P0116
(DI-37)Engine Coolant Temp.
Circuit Range/ Performance Problem
Engine coolant temp. sensor

Cooling system
SAE CONTROLLED
DIAGNOSTIC TROUBLE CODE CHART
IN-22- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 TERCEL (RM440U)
4. DIAGNOSTIC TROUBLE CODE CHART
The inspection procedure is shown in the table below. This table permits efficient and accurate troubleshoot-
ing using the diagnostic trouble codes displayed in the diagnostic trouble code check. Proceed with trouble-
shooting in accordance with the inspection procedure given in the diagnostic chart corresponding to the
diagnostic trouble codes displayed. The engine diagnostic trouble code chart is shown below as an example.

- 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

IN-38
- INTRODUCTIONTERMS
1996 TERCEL (RM440U) TCM
Transmission Control ModuleTransmission ECU, ECT ECU
TPThrottle PositionThrottle Position
TRTransmission Range-
TVVThermal Vacuum ValveBimetallic Vacuum Switching Valve (BVSV)
Thermostatic Vacuum Switching Valve (TVSV)
TWCThree-W ay Catalytic Converter
Three-W ay Catalytic (TWC)
Manifold Converter
CC
RO
TWC+OCThree-W ay + Oxidation Catalytic ConverterCCR + CCo
VA FVolume Air FlowAir Flow Meter
VRVoltage RegulatorVoltage Regulator
VSSVehicle Speed SensorVehicle Speed Sensor
WOTWide Open ThrottleFull Throttle
WU-OCWarm Up Oxidation Catalytic Converter-
WU-TWCWarm Up Three-Way Catalytic Converter-
3GRThird Gear-
4GRFourth Gear-

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

- DIAGNOSTICSENGINE
DI-1 1
1996 TERCEL (RM440U)
Proceed to matrix chart of problem symp-
toms on page DI-19.
7. ENGINE OPERATING CONDITION
NOTICE:
The values given below for ºNormal Conditionº are representative values, so a vehicle may still be
normal even if its value from those listed here. So do not decide whether a part is faulty or not solely
according to the ºNormal Conditionº here.
CARB mandated signals:
TOYOTA hand-held tester displayMeasurement ItemNormal Condition*
FUEL SYS #1
Fuel System Bank 1
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operating
Idling after warming up: CLOSED
CALC LOAD
Calculator Load:
Current intake air volume as a proportion of max.
intake air volumeIdling: 19.7 - 47.4 %
Racing without load (2,500rpm): 18.8 - 46.4 %
COOLANT TEMP.Engine Coolant Temp. Sensor ValueAfter warming up: 80 - 95°C (176 - 203°F)
SHORT FT #1Short-term Fuel Trim Bank 10 ± 20%
LONG FT #1Long-term Fuel Trim Bank 10 ± 20%
ENGINE SPDEngine SpeedIdling: 700 - 800 rpm
VEHICLE SPDVehicle SpeedVehicle Stopped: 0 km/h (0 mph)
IGN ADVANCEIgnition Advance:
Ignition Timing of Cylinder No. 1Idling: BTDC 7 - 14°
INTAKE AIRIntake Air Temp. Sensor ValueEquivalent to Ambient Temp.
MAPAbsolute Pressure Inside Intake Manifold
Idling: 20 - 48 kPa
Racing without load (2,500 rpm):
19 - 47 kPa
THROTTLE POS
Voltage Output of Throttle Position Sensor
Calculated as a percentage:
0 V "0%, 5 V "100%Throttle Fully Closed: 6 - 16 %
Throttle Fully Open: 64 - 98 %
O2S B1, S1Voltage Output of Heated Oxygen Sensor
Bank 1, Sensor 1Idling: 0.1 - 0.9 V
O2FT B1, S1Oxygen Sensor Fuel Trim Bank 1, Sensor 1
(Same as SHORT FT #1)0 ± 20 %
O2S B1, S2Voltage Output of Oxygen Sensor
Bank 1, Sensor 2Driving at 50 km/h (31 mph): 0.1 - 0.9 V
*: If no conditions are specifically stated for ºldlingº, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.

DI-12
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
TOYOTA Enhanced Signals:
TOYOTA hand-held tester displayMeasurement ItemNormal Condition*
MISFIRE RPMEngine RPM for first misfire rangeMisfire 0: 0 rpm
MISFIRE LOADEngine load for first misfire rangeMisfire 0: 0 g/r
INJECTORFuel injection time for cylinder No.1Idling: 2.66 - 3.9 ms
IAC DUTY RATIOIntake Air Control Valve Duty Ratio
Opening ratio rotary solenoid type IAC valveIdling: 25.5 - 43 %
STARTER SIGStarter SignalCranking: ON
CTP SIGClosed Throttle Position SignalThrottle Fully Closed: ON
A/C SIGA/C Switch SignalA/C ON: ON
PNP SWPark/Neutral Position Switch SignalP or N position: ON
FC IDLFuel Cut Idle: Fuel cut when throttle valve fully
closed, during decelerationFuel cut operating: ON
FC TAUFuel Cut TAU: Fuel cut during very light loadFuel cut operating: ON
CYL#1, CYL#2, CYL#3, CYL#4Abnormal revolution variation for each cylinder0%
IGNITIONTotal number of ignition for every 1,000 revolu-
tions0 - 2,000 rpm
FUEL PUMPFuel Pump SignalIdling: ON
TOTAL FT B1Total Fuel Trim Bank 1: Average value for fuel
trim system of bank 1Idling: 0.8 - 1.2 V
O2 LR B1, S1
Oxygen Sensor Lean Rich Bank 1, Sensor 1 Re-
sponse time for oxygen sensor output to switch
from lean to rich.
Idling after warmed up: 0 - 1,000 msec.
O2 RL B1, S1
Oxygen Sensor Rich Lean Bank 1, Sensor 1 Re-
sponse time for oxygen sensor output to switch
from rich to lean.
Idling after warmed up: 0 - 1,000 msec.
*: If no conditions are specifically stated for ºldlingº, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.

DI4LF-02
- DIAGNOSTICSENGINE
DI-13
1996 TERCEL (RM440U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code listed
in the table below, for details of each code, turn to the page referred to under the ''See page '' for the respec-
tive ''DTC No.'' in the DTC chart.
SAE Controlled:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*Memory
P0105
(DI-20)
Manifold Absolute
Pressure/Barometric
Pressure Circuit
MalfunctionOpen or short in manifold absolute pressure sensor circuit
Manifold absolute pressure sensor
ECM

P0106
(DI-23)
Manifold Absolute
Pressure/Barometric
Pressure Circuit
Range/Performance Problem
Manifold absolute pressure sensor
P0110
(DI-24)Intake Air Temp. Circuit
MalfunctionOpen or short in intake air temp. sensor circuit
Intake air temp. sensor
ECM

P0115
(DI-28)Engine Coolant Temp. Circuit
MalfunctionOpen or short in engine coolant temp. sensor circuit
Engine coolant temp. sensor
ECM

P0116
(DI-32)Engine Coolant Temp. Circuit
Range/Performance ProblemEngine coolant temp. sensor
Cooling system
P0120
(DI-33)Throttle/Pedal Position
Sensor/Switch ºAº Circuit
MalfunctionOpen or short in throttle position sensor circuit
Throttle position sensor
ECM

P0121
(DI-37)Throttle/Pedal Position
Sensor/Switch ºAº Circuit
Range/Performance Problem
Throttle position sensor
P0125
(DI-38)Insufficient Coolant Temp. for
Closed Loop Fuel ControlOpen or short in oxygen sensor circuit
Oxygen sensor
P0130
(DI-41)Oxygen Sensor Circuit
Malfunction (Bank 1 Sensor 1)Heated oxygen sensor
Fuel trim malfunction
P0133
(DI-44)Oxygen Sensor Circuit
Slow Response
(Bank 1 Sensor 1)
Oxygen sensor
P0136
(DI-45)Heated Oxygen Sensor Circuit
Malfunction
(Bank 1 Sensor 2)
Heated oxygen sensor
P0141
(DI-47) Heated Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 2)Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
ECM

*: 


MIL lights up

- DIAGNOSTICSENGINE
DI-23
1996 TERCEL (RM440U)
DTC P0106 Manifold Absolute Pressure/Barometric
Presure Circuit Range/Performance Problem
CIRCUIT DESCRIPTION
Refer to DTC P0105 on page DI-20.
DTC No.DTC Detection ConditionTrouble Area
P0106
Conditions (a) and (b) continue with engine speed
400 - 1,000 rpm:
(2 trip detection logic)
(a) Closed throttle position switch: ON
(b) Manifold absolute pressure sensor output > 3.0 V

Manifold absolute pressure sensor
WIRING DIAGRAM
Refer to DTC P0105 on page DI-20.
INSPECTION PROCEDURE
HINT:
If DTC P0105 and P0106 are output simultaneously, manifold absolute pressure sensor circuit may be open.
Perform troubleshooting of DTC P0105 first.
1 Are there any other codes (besides DTC P0106) being output?
YES Go to relevant DTC chart.
NO
2 Check manifold absolute pressure sensor (See page MF-48).
NG Replace manifold absolute pressure sensor.
OK
Check vacuum line for manifold absolute
pressure sensor for blockage.
DI1E4-05