2000 TOYOTA CAMRY Fuel line

This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the water temp. is input into TERMINAL THW of the engine control module as a control signal.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a
control signal into TERMINAL THA of the engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINALS OXL1, OXR1
(Except California) and OXS of the engine control module. To maintain stable detection performance by the heated
oxygen sensor, a heater is used for warming the sensor. The heater is also controlled by the engine control module
(HTL, HTR (Except California) and HTS).
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
The camshaft position is input as a control signal to TERMINAL G22+ of the engine control module, and the engine
RPM is input into TERMINAL NE+.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINAL
VTA1 of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into
TERMINAL SPD of the engine control module.
(7) Park/Neutral position SW signal circuit
The Park/Neutral position SW detects whether the shift position is in neutral, parking or not, and inputs a control signal
into TERMINAL STA of the engine control module.
(8) A/C SW signal circuit
The A/C control assembly (Automatic A/C) or A/C Amplifier (Manual A/C) inputs the A/C operations into TERMINAL A/C
of the engine control module as a control signal.
(9) Battery signal circuit
(California or w/ engine immobiliser and/or traction control)
Voltage is always supplies to TERMINAL BATT of the engine control module.
If you turn on the ignition SW, the current goes from TERMINAL MREL of the engine control module to the EFI relay and
put on the relay, and the voltage related to the engine control module operation is supplied to TERMINAL +B of the
engine control module through the EFI relay.
(Except California or w/ engine immobiliser and/or traction control)
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on,
voltage for engine control module start±up power supply is applied to TERMINAL +B of engine control module via EFI
relay.
(10) Intake air volume signal circuit
Intake air volume is detected by the mass air flow meter and a signal is input into TERMINAL VG of the engine control
module as a control signal.
(11) NSW signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the
signal is input into TERMINAL NSW of the engine control module as a control signal.
(12) Engine knock signal circuit
Engine knocking is detected by the knock sensor 1 and 2, then the signals are input into TERMINALS KNKR and KNKL
of the engine control module as a control signal.
(13) Air fuel ratio signal circuit (California)
The air fuel ratio is detected and input as a control signal into TERMINALS AFL+, AFR+ of the engine control module.
SYSTEM OUTLINE

ENGINE CONTROL (5S±FE)
This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor detects the intake air temp., which is input as a control signal into TERMINAL THA of the
engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINAL OX1 (except
California) and OX2 of the engine control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G+ of the engine control module, and engine RPM is input
into TERMINAL NE+.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINAL
VTA of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into
TERMINAL SPD of the engine control module.
(7) Park/Neutral position SW signal circuit (A/T)
The Park/Neutral position SW detects whether the shift position are in neutral, parking or not, and inputs a control signal
into TERMINAL STA of the engine control module.
(8) A/C SW signal circuit
The A/C amplifier function is built in the engine control module. The A/C SW signal inputs into the TERMINAL A/C SW of
the engine control module.
(9) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start±up power supply is applied to TERMINAL +B of engine control module via EFI
relay.
(10) Intake air volume signal circuit
Intake air volume is detected by the manifold absolute pressure sensor (for manifold pressure) and is input as a control
signal into TERMINAL PIN of the engine control module.
(11) Starter signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the
signal is input into TERMINAL NSW of the engine control module as a control signal.
(12) Engine knock signal circuit
Engine knocking is detected by knock sensor 1 and the signal is input into TERMINAL KNK as a control signal.
(13) Electrical load signal circuit
The signal when systems such as the rear window defogger, headlights, etc. Which cause a high electrical burden are
on is input to TERMINAL ELS as a control signal.
(14) Air fuel ratio signal circuit (California)
The air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE

ABS AND TRACTION CONTROL
(ABS)
ABS is a brake system designed for the purpose to improve the operating ability securing the stability of the vehicle by
preventing the looking±up of the vehicle controlling the wheel cylinder pressure of all the four wheels at the time of sudden
braking.
1. INPUT SIGNALS
(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+, and RR+ of the ABS and traction ECU.
(2) Stop light SW signal
A signal is input to TERMINAL STP of the ABS and traction ECU when brake pedal is depressed.
2. SYSTEM OPERATION
When the wheels are to be locked±up, the solenoid inside the actuator will be controlled by the signal from the ABS and
traction ECU and the brake fluid in the wheel cylinder will flow through the reservoir and reduce the hydraulic pressure.
While the ABS is in operation, as the ABS and traction ECU always outputs the operation signal to the pump inside the
actuator, brake fluid stored inside the reservoir will be suctioned up by the pump inside the actuator and returned to the
master cylinder.
When the hydraulic pressure of the wheel cylinder is decompressed or increased until the necessary hydraulic pressure, the
solenoid inside the actuator is controlled by the control signal from the ABS and traction ECU and as a result, hydraulic
pressure of the wheel cylinder will be closed at both routes of the master cylinder and reservoir sides and the hydraulic
pressure of the wheel cylinder will become to be in the holding condition.
If the increase of hydraulic pressure volume of the wheel cylinder becomes necessary, with the control signal from the ABS
and traction ECU, the solenoid inside the actuator will be controlled and become the same condition as usual and the brake
fluid of the master cylinder will be sent to the wheel cylinder and will increase the hydraulic pressure of the wheel cylinder. At
this time, in the case that the brake fluid stays left in the reservoir, it will be sucked up by the pump inside the actuator and
will be sent to the wheel cylinder.
Also, increasing speed of the hydraulic pressure is controlled by outputting the increasing and the said holding one after
another.
(Traction control)
Traction control system is designed to perform the engine output control by the fuel cut and hydraulic pressure control of
driving wheel brake and control the spinning of the driving wheels. By doing this, it improves starting acceleration and
operating ability of the vehicle securing the driving ability in accordance with the road surface condition.
3. TRACTION CONTROL OPERATION
Estimating the vehicle speed from the rear wheel speed, comparing it with the front, driving wheel speed and judging the grip
condition of the driving wheels. From the estimated vehicle speed, target speed of the driving speed will be set. When the
front, driving wheel speed exceeds the control starting speed, it judges that the tire slip is occurred and performs the fuel cut
cylinder number control and brake control and then adjust to make the front wheel speed become the traction control target
speed. Controlling of the traction control will be completed when the vehicle move onto the road where the driving wheels will
not have a tire slip or when the driver decelerate.
ABS MOTOR RELAY [R/B NO.3]
3±4 : Approx. 62 W
ABS SOL RELAY [R/B NO.3]
4±6 : Approx. 80 W
A9, A10 ABS SPEED SENSOR FRONT LH, RH
1±2 :0.6 kW±2.5 kW
A15 (A), A16 (B), A17 (C) ABS AND TRACTION ECU
(B) 8±GROUND : Approx. 12 volts with the ignition SW at ON position
(B)11±GROUND : Continuity with the ignition SW on and the traction off SW on (Traction control off)
(B)16±GROUND : Approx. 12 volts with the brake pedal depressed
(A)15, (C) 9, (C) 10±GROUND : Always continuity
A25, A26
ABS SPEED SENSOR REAR LH, RH
1±2 :1.2 kW±2.3 kW
T2 THROTTLE POSITION SENSOR
1±2 :3.5 kW±5.0 kW
SYSTEM OUTLINE
SERVICE HINTS

L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCodePart Name Part Number
Note : Not all of the above part numbers of the connector are established for the supply. In case of ordering
a connector or terminal with wire, please confirm in advance if there is supply for it using ªParts Catalog
Newsº (published by Parts Engineering Administration Dept.).
A 1A/C Condenser Fan Motor90980±10928
A 2A/C Magnetic Clutch and Lock Sensor90980±10942
A 3A/C Triple Pressure SW
(A/C Dual and Single Pressure SW)90980±10943
A 4ABS Actuator90980±11413
A 5ABS Actuator90980±10891
A 6ABS Actuator and ECU90080±98070
A 7ABS and Traction Actuator90980±11698
A 8ABS and Traction Actuator90980±11413
A 9ABS Speed Sensor Front LH90980±11075A10ABS Speed Sensor Front RH90980±11 075
A11Air Fuel Ratio Sensor90980±11178
A12A/C Amplifier90980±10807
A13A/C Evaporator Temp. Sensor90980±10825
A14A/C SW90980±10631
A15ABS and Traction ECU90980±11390
A16ABS and Traction ECU90980±11391
A17ABS and Traction ECU90980±11424A18ABS ECU90980±11424
A19ABS ECU90980±11390
A20Air Vent Mode Control Servo Motor90980±11165
A22Airbag Squib
(Front Passenger Airbag Assembly)90980±11884
A23Airbag Squib (Steering Wheel Pad)90980±10850
A24Ashtray Illumination81945±33010
A25ABS Speed Sensor Rear LH90980±11060A26ABS Speed Sensor Rear RH90980±11060
A27Auto Antenna Motor and Relay90980±11697
A28Air Fuel Ratio Sensor (Bank 1 Sensor 1)90980±11178A29Air Fuel Ratio Sensor (Bank 2 Sensor 1)90980±11 178
A30A/C Ambient Temp. Sensor90980±11070
A31Airbag Sensor Front LH90980±11856A32Airbag Sensor Front RH90980±11 856
A33A/C Blower Motor Linear Controller90980±11676
A34A/C Control Assembly90980±11390
A35A/C Control Assembly90980±11391
A36A/C Room Temp. Sensor90980±10825
A37A/C Solar Sensor90980±11918
A38Air Inlet Control Servo Motor90980±11165
A39Air Mix Control Servo Motor90980±11319
A40Automatic Light Control Sensor90980±11107
B 1Back±Up Light SW90980±11250
B 2Brake Fluid Level Warning SW90980±11207
B 3Blower Motor90980±10903
B 4Blower Resistor90980±10976
B 5Blower SW90980±10877
B 6Buckle SW LH90980±10825B 7Buckle SW LH90980±10825
B 8Blower Resistor (Low Speed)90980±10976
C 1Camshaft Position Sensor90980±10947C 2Crankshaft Position Sensor90980±10947
C 3Cruise Control Actuator90980±11150
C 4Cigarette Lighter90980±10760
C 5Cigarette Lighter Illumination90980±11148
C 6Clock90980±11013
C 7Clutch Start SW90980±10825
C8Combination Meter (TMC Made)90980±11114C 8Combination Meter (TMMK Made)90980±98048
C9Combination Meter (TMC Made)90980±11113C 9Combination Meter (TMMK Made)90980±98046
C10Combination Meter (TMC Made)90980±11115C10Combination Meter (TMMK Made)90980±98047
C11Combination SW90980±11594
C12Combination SW90980±11616
C13Combination SW90980±11672
C14Cruise Control Clutch SW90980±10906
C15Cruise Control ECU90980±11391
C16Condenser90980±10860
C17Center Airbag Sensor Assembly90980±11869
C18Center Airbag Sensor Assembly90980±11872
C19Center Airbag Sensor Assembly90980±11867
D1Data Link Connector 1 (1MZ±FE)90980±11195D 1Data Link Connector 1 (5S±FE)90980±11323
D 2Daytime Running Light Resistor90980±10928
D 3Diode (A/C)90980±11071
D 4Data Link Connector 290980±11417
D 5Data Link Connector 390980±11665
D6Daytime Running Light Relay (Main)90980±11058D 6Daytime Running Light Relay (Main)90980±11 058
D7Di d (C t )D7Diode (Courtesy)D 7Diode (Courtesy)90980±10962D10Diode (Dome)90980±10962
D11Diode (Idle±Up)90980±11071
D12Door Courtesy SW Front LH
D13Door Courtesy SW Front RH90980±10871D14Door Courtesy SW Rear LH90980±10871
D15Door Courtesy SW Rear RH
D16Door Key Lock and Unlock SW Front LH90980±11490D17Door Key Lock and Unlock SW Front RH90980±11490

DI00I±09
DI±16
± DIAGNOSTICSENGINE (5S±FE)
251 Author: Date:
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*1Memory
P0105
(DI±29)
Manifold Absolute
Pressure/Barometric
Pressure Circuit
MalfunctionOpen or short in manifold absolute pressure sensor circuit
Manifold absolute pressure sensor
ECM

P0106
(DI±33)Manifold Absolute Pressure
Circuit Range/Performance
ProblemManifold absolute pressure sensor
Vacuum line
P0110
(DI±35)Intake Air Temp. Circuit
MalfunctionOpen or short in intake air temp. sensor circuit
Intake air temp. sensor (built into mass air flow meter)
ECM

P0115
(DI±41)Engine Coolant Temp. Circuit
MalfunctionOpen or short in engine coolant temp. sensor circuit
Engine coolant temp. sensor
ECM

P0116
(DI±47)Engine Coolant Temp. Circuit
Range/Performance ProblemEngine coolant temp. sensor
Cooling system
P0120
(DI±49)Throttle/Pedal Position
Sensor/Switch ºAº Circuit
MalfunctionOpen or short in throttle position sensor circuit
Throttle position sensor
ECM

P0121
(DI±54)Throttle/Pedal Position
Sensor/Switch ºAº Circuit
Range/Performance Problem
Throttle position sensor
*2
P0125
(DI±61)
Insufficient Coolant Temp. for
Closed Loop Fuel Control
(Except California Spec.)Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
ECM

*3
P0125
(DI±55)
Insufficient Coolant Temp. for
Closed Loop Fuel Control
(Only for California Spec.)Open or short in A/F sensor circuit
A/F sensor
ECM

*2
P0130
(DI±66)Heated Oxygen Sensor Circuit
Malfunction (Bank 1 Sensor 1)Heated oxygen sensor
Fuel trim malfunction
*2
P0133
(DI±71)
Heated Oxygen Sensor Circuit
Slow Response
(Bank 1 Sensor 1)Heated oxygen sensor
Fuel trim malfunction
*2
P0135
(DI±75)
Heated Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 1)Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
 ECM

*1: 


MIL lights up
*
2: Except California specification vehicles
*
3: Only for California specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±17
252 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
P0136
(DI±77)Heated Oxygen Sensor Circuit
Malfunction
(Bank 1 Sensor 2)
Heated oxygen sensor
P0141
(DI±75) Heated Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 2)
Same as DTC P0135
*3
P0171
(DI±84)
System too Lean
(Fuel Trim)
(Except California Spec.)
Air intake (hose loose)
Fuel line pressure
Injector blockage
Heated oxygen sensor (bank 1 sensor 1)
Manifold absolute pressure sensor
Engine coolant temp. sensor
*1
*3
P0172
(DI±84)
System too Rich
(Fuel Trim)
(Except California Spec.)
Fuel line pressure
Injector leak, blockage
Heated oxygen sensor (bank 1 sensor 1)
Manifold absolute pressure sensor
Engine coolant temp. sensor
*1
*4
P0171
(DI±79)
System too Lean
(Fuel Trim)
(Only for California Spec.)
Air intake (hose loose)
Fuel line pressure
Injector blockage
Manifold absolute pressure sensor
Engine coolant temp. sensor
A/F sensor
*1
*4
P0172
(DI±79)
System too Rich
(Fuel Trim)
(Only for California Spec.)
Fuel line pressure
Injector leak, blockage
Manifold absolute pressure sensor
Engine coolant temp. sensor
A/F sensor
*1
P0300
(DI±89)Random/Multiple Cylinder
Misfire Detected
Ignition system
Injector
Fuel line pressure
EGR
Ci
P0301
P0302
P0303
P0304
(DI±89)Misfire Detected
± Cylinder 1
± Cylinder 2
± Cylinder 3
± Cylinder 4
Compression pressure
Valve clearance not to specification
Valve timing
Manifold absolute pressure sensor
Engine coolant temp. sensor
Open or short engine wire
Connector connection
ECM
*2
P0325
(DI±97)Knock Sensor 1 Circuit
MalfunctionOpen or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
*1
P0335
(DI±100)Crankshaft Position Sensor
ºAº Circuit Malfunction
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Starter
ECM
*1
*1: MIL lights up
*
2: MIL lights up or blinking
*
3: Except California Specification vehicles
*
4: Only for California Specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±33
268 Author: Date:
DTC P0106 Manifold Absolute Pressure Circuit
Range/Performance Problem
CIRCUIT DESCRIPTION
Refer to DTC P0105 (Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction) on page
DI±29.
DTC No.DTC Detecting ConditionTrouble Area
P0106
After engine is warmed up, conditions (a) and (b) continue with
engine speed 400 ~ 1,000 rpm
(2 trip detection logic)
(a) Throttle valve fully closed
(b) Manifold absolute pressure sensor output > 3.0 V

Manifold absolute pressure sensorP0106Condition (c) and (d) continue with engine speed 2,500 rpm or
less
(2 trip detection logic)
(c) VTA > 1.85
(d) Manifold absolute pressure sensor output < 1.0 V

Manifold absolute ressure sensor

Vacuum line
WIRING DIAGRAM
Refer to DTC P0105 (Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction) on page
DI±29.
INSPECTION PROCEDURE
HINT:

If DTC P0105 (Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction) and P0106 (Man-
ifold Absolute Pressure /Barometric Pressure Circuit Range/Performance Problem) are output simul-
taneously, manifold absolute pressure sensor circuit may be open. Perform troubleshooting of DTC
P0105 first.

If DTC P0105 (Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction), P0106 (Manifold
Absolute Pressure /Barometric Pressure Circuit Range/Performance Problem), P0110 (Intake Air
Temp. Circuit Malfunction), P0115 (Engine Coolant Temp. Circuit Malfunction) and P0120 (Throttle/
Pedal Position Sensor/Switch ºAº Circuit Malfunction) are output simultaneously, E2 (sensor ground)
may be open.

Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel
ratio lean or rich, etc. at the time of the malfunction.
1 Are there any other codes (besides DTC P0106) being output?
YES Go to relevant DTC chart.
NO
DI00N±04

P24296
Throttle Position
Sensor
VC
VTA
E2ECM
± DIAGNOSTICSENGINE (5S±FE)
DI±49
284 Author: Date:
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 termi-
nals 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
vehicle driving conditions from this signal input from terminal
VTA, and uses it as one of the conditions for deciding the air±
fuel ratio correction, power increase correction and fuel±cut
control etc.
DTC No.DTC Detecting ConditionTrouble Area
P0120
Condition (a) or (b) continues with more than 5 sec.:
(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 percentage
Trouble Area
Throttle valve fully closedThrottle valve fully open
Trouble Area
0 %0 %VC line open
VTA line open or short
Approx. 100 %Approx. 100 %E2 line open
DI00R±05