2000 TOYOTA CAMRY coolant temperature

P21242 FI7210
A00027
Atmosphere
CoverIdeal Air±Fuel Mixture
Air Fuel Ratio
RicherLeaner
Exhaust GasFlange
Platinum Electrode
Solid Electrolyte
(Zirconia Element)
Platium Electrode
Heater
Coating(Ceramic)
Output Voltage
DI±244
± DIAGNOSTICSENGINE (1MZ±FE)
479 Author: Date:
DTC P0125 Insufficient Coolant Temp. for Closed Loop
Fuel Control (Except California Spec.)
CIRCUIT DESCRIPTION
To obtain a high purification rate for the CO, HC and NOx components of the exhaust gas, a three±way
catalytic converter is used, but for the most efficient use of the three±way catalytic converter, the air±fuel
ratio must be precisely controlled so that it is always close to the stoichiometric air±fuel ratio.
The oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity of the
stoichiometric air±fuel ratio. This characteristic is used to detect the oxygen concentration in the exhaust
gas and provide feedback to the computer for control of the air±fuel ratio.
When the air±fuel ratio becomes LEAN, the oxygen concentration in the exhaust increases and the oxygen
sensor informs the ECM of the LEAN condition (small electromotive force: < 0.45 V).
When the air±fuel ratio is RICHER than the stoichiometric air±fuel ratio the oxygen concentration in the ex-
haust gas is reduced and the oxygen sensor informs the ECM of the RICH condition (large electromotive
force: > 0.45 V). The ECM judges by the electromotive force from the oxygen sensor whether the air±fuel
ratio is RICH or LEAN and controls the injection time accordingly. However, if malfunction of the oxygen sen-
sor causes output of abnormal electromotive force, the ECM is unable to perform accurate air±fuel ratio con-
trol.
The heated oxygen sensors include a heater which heats the zirconia element. The heater is controlled by
the ECM. When the intake air volume is low (the temperature of the exhaust gas is low) current flows to the
heater to heat the sensor for accurate oxygen concentration detection.
DTC No.DTC Detecting ConditionTrouble Area
P0125
After engine is warmed up, heated oxygen sensor (bank 1, 2
sensor 1) output does not indicate RICH ( 0.45 V ) even
once when conditions (a), (b), (c) and (d) continue for at least
2 min.:
(a) Engine speed: 1,500 rpm or more
(b) Vehicle speed: 40
SPD and 100 km/h (25
SPD and
62 mph)
(c) Throttle valve does not fully closed
(d) 140 sec. or more after starting engine
Fuel system

Injector

Ignition system

Gas leakage on exhaust system

Open or short in heated oxygen sensors (bank 1, 2 sensor 1)
circuit

Heated oxygen sensors (bank 1, 2 sensor 1)

ECM
DI07M±08

A00199
ECM
Mass Air Flow MeterVSV
for
EGR
EGR Valve
Position
Sensor
EGR Valve EGR Gas
Temp. Sensor
Crankshaft Position Sensor Engine Coolant
Temp. SensorIntake Air
Chamber Throttle ValveVacuum
Control
Valve
DI±292
± DIAGNOSTICSENGINE (1MZ±FE)
527 Author: Date:
DTC P0401 Exhaust Gas Recirculation Flow
Insufficient Detected (Ex CA Spec.)
CIRCUIT DESCRIPTION
The EGR system recirculates exhaust gas, which is controlled to the proper quantity to suit the driving condi-
tions, into the intake air mixture to slow down combustion, reduce the combustion temperature and reduce
NOx emissions.
The lift amount of EGR valve is controlled by the vacuum which is regulated by the Duty±VSV operated by
the ECM. The lift amount of EGR valve is detected by the EGR valve position sensor which is mounted on
the EGR valve and it provides feedback to the ECM to control the lift amount of EGR valve in response to
engine operating conditions.
Under the following conditions, EGR is cut to maintain driveability.

Before the engine is warmed up

During deceleration (throttle valve closed)

Light engine load (amount of intake air very small)

Engine speed over 4,000 rpm

Engine idling
DTC No.DTC Detecting ConditionTrouble Area
P0401
After engine is warmed up and run at 80 km/h (50 mph) for 3 to
5 min. EGR gas temperature sensor valve does not exceed
35°C (95°F) above ambient air temperature
(2 trip detection logic)

EGR valve (stuck closed)

Open or short in EGR gas temp. sensor circuit

EGR gas temp. sensor

Open in VSV circuit for EGR

VSV for EGR

Vacuum control valve

Vacuum hose disconnected or blocked

ECM
DI4DS±01

± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±393
628 Author: Date:
(b) Clearance the DTC.
The following actions will erase the DTC and freeze frame
data. Operating an OBD II scan tool (complying with SAE
J1978) or TOYOTA hand±held tester to erase the codes.
(See the OBD II scan tool's instruction book for operating
instructions.)
4. ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50 ± 80 °C (122 ± 176 °F).
(a) D position test
Shift into the D position and fully depress the accelerator pedal and and check the following points:
(1) Check up±shift operation.
1 " 2, 2 " 3 and 3 " O/D up±shifts take place, at the shift point shown in the automatic shift
schedule (See page SS±54).
HINT:

O/D Gear Up±shift Prohibition Control (1. Coolant temp. is 50 °C (122 °C) or less. 2. If there is a 10
km/h (6 mph) difference between the set cruise control speed and vehicle speed.)

O/D Gear Lock±up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 50 °C
(122 °C) or less.)
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3 and 3 " O/D up±shifts.
(3) Check for abnormal noises and vibration.
Run at the D position lock±up or O/D gear and check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
due to loss of balance in the differential or torque converter clutch, etc.
(4) Check kick±down operation.
While running in the D position, 2nd, 3rd and O/D gears, check to see that the possible kick±down
vehicle speed limits for 2 " 1, 3 " 2 and O/D " 3 kick±downs conform to those indicated on
the automatic shift schedule (See page SS±54).
(5) Check abnormal shock and slip at kick±down.
(6) Check the lock±up mechanism.

Drive in D position, O/D gear, at a steady speed (lock±up ON) of about 75 km/h (47 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock±up.
(b) 2 position test
Shift into the 2 position and fully depress the accelerator pedal and check the following points:
(1) Check up±shift operation.
Check to see that the 1 " 2 up±shift takes place and that the shift point conforms to the automatic
shift schedule (See page SS±54).
HINT:
There is no O/D up±shift and lock±up in the 2 position.
(2) Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.

DI±442
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
677 Author: Date:
(b) Clearance the DTC.
The following actions will erase the DTC and freezed
frame data. Operating an OBD II scan tool (complying
with SAE J1978) or TOYOTA hand±held tester to erase
the codes.
(See the OBD II scan tool's instruction book for operating
instructions.)
4. ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50 ± 80 °C (122 ± 176 °F).
(a) D POSITION TEST
Shift into the D position and fully depress the accelerator pedal and and check the following points:
(1) Check up±shift operation.
1 " 2, 2 " 3 and 3 " O/D up±shift takes place, at the shift point shown in the automatic shift
schedule (See page SS±56).
HINT:

O/D Gear Up±shift Prohibition Control (1. Coolant temp. is 60 °C (140 °F) or less. 2. If there is a 10
km/h (6 mph) difference between the set cruise control speed and vehicle speed.)

O/D Gear Lock±up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 60 °C
(140 °F) or less.)
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3 and 3 " O/D up±shifts.
(3) Check for abnormal noises and vibration.
Run at the D position lock±up or O/D gear and check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
due to loss of balance in the differential torque converter clutch, etc..
(4) Check kick±down operation.
While running in the D position, 2nd, 3rd and O/D gears, check to see that the possible kick±down
vehicle speed limits for 2 " 1, 3 " 2 and O/D " 3 kick±downs conform to those indicated on
the automatic shift schedule (See page SS±56).
(5) Check abnormal shock and slip at kick±down.
(6) Check the lock±up mechanism.

Drive in D position, O/D gear, at a steady speed (lock±up ON) of about 60 km/h (37 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock±up.
(b) 2 POSITION TEST
Shift into the 2 position and fully depress the accelerator pedal and check the following points:
(1) Check up±shift operation.
Check to see that the 1 " 2 up±shift takes place and that the shift point conforms to the automatic
shift schedule (See page SS±56).
HINT:
There is no O/D up±shift and lock±up in the 2 position.
(2) Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.
(3) Check for abnormal noises during acceleration and deceleration, and for shock at up±shift and
down±shift.

EC03G±04
S05568
Cap
Filter
B06540
Vacuum Gauge
3±Way Connector
A07370
SST
E1
TE1
B06541
HOTHigh Vacuum at 2,500 rpm
Port R
Disconnect
EC±12
± EMISSION CONTROL (5S±FE)EXHAUST GAS RECIRCULATION (EGR) SYSTEM
1410 Author: Date:
INSPECTION
1. INSPECT EGR SYSTEM
(a) Inspect and clean the filter in the EGR vacuum modulator.
(1) Remove the cap and filter.
(2) Check the filter for contamination or damage.
(3) Using compressed air, clean the filter.
(4) Reinstall the filter and cap.
HINT:
Install the filter with the coarser surface facing the atmospheric
side (outward).
(b) Using a 3±way connector, connect a vacuum gauge to the
hose between the EGR valve and VSV.
(c) Inspect seating of the EGR valve.
Start the engine and check that the engine starts and runs
at idle.
(d) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843±18020
(e) Inspect the VSV operation with the cold engine.
(1) The engine coolant temperature should be below
55°C (131°F).
(2) Check that the vacuum gauge indicates zero at
2,500 rpm.
(f) Inspect the operation of the VSV and EGR vacuum modu-
lator with the hot engine.
(1) Warm up the engine to above 60°C (140°F).
(2) Check that the vacuum gauge indicates low vacu-
um at 2,500 rpm.
(3) Disconnect the vacuum hose port R of the EGR vac-
uum modulator and connect port R directly to the in-
take manifold with another hose.
(4) Check that the vacuum gauge indicates high vacu-
um at 2,500 rpm.

EGR Gas Temperature
Sensor Connector
Water Bypass Hose
A06657
PS Pressure TubeAir Intake Chamber Stay
V±Bank Cover
VSV Connector
for EGR
Engine Wire
Gasket
No.2 EGR Pipe
Throttle Position
Sensor Connector
Vacuum Hose
EGR Valve Position Brake Booster12 (120,9)
39 (400,29)

Gasket
Sensor Connector
IAC Valve
ConnectorAccelerator Cable
Throttle Cable
Purge Hose
Air Assist Hose Hose Vacuum

Gasket
VSV Connector for ACIS
Engine Coolant
Reservoir Hose
43 (440,32)
ECT Sender
Gauge Connector
ECT Sensor
Connector
Grand Strap
Connector
15 (150,11)
Water Outlet
15 (150,11)
Water Bypass
Hose
Upper Radiator
Hose
Fuel Inlet Hose
Injector Connector Intake Manifold Assembly
Retainer
Heater Hose

Gasket Ignition Coil
Connector

Non±reusable part: Specified torque
N´m (kgf´cm, ft´lbf)
19.5 (200, 14)
No.1 Engine
Hanger
VSV Connector for
EVAP
Ground Cable
PCV Hose Ground Cable
Air Intake Chamber
Assembly

Gasket
High±Tension Cord Set
Spark PlugIgnition Coil
Water Bypass Hose
Ground Strap
DLC1
EM±28
± ENGINE MECHANICAL (1MZ±FE)CYLINDER HEAD
1314 Author: Date:

EM04S±05
S04528
Hexagon
Clip
A06658
(l)
(m) (n)
S05049
(o)
(p)
(q) (s)(r)
(t) EM±32
± ENGINE MECHANICAL (1MZ±FE)CYLINDER HEAD
1318 Author: Date:
REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE AIR CLEANER CAP ASSEMBLY AND AIR
FILTER
3. REMOVE ENGINE RH FENDER APRON SEAL
4. REMOVE FRONT EXHAUST PIPE (See page EM±71)
5. REMOVE RH ENGINE MOUNTING STAY
6. REMOVE V±BANK COVER
(a) Using a 5 mm hexagon wrench, remove the 2 nuts.
(b) Disconnect the 2 clips, and remove the cover.
7. REMOVE HIGH±TENSION CORD SET
(See page IG±7)
8. REMOVE AIR INTAKE CHAMBER ASSEMBLY
(a) Disconnect the accelerator cable.
(b) Disconnect the A/T throttle cable.
(c) Disconnect the throttle position sensor connector.
(d) Disconnect the IAC valve connector.
(e) Disconnect the EGR gas temperature sensor connector.
(f) Disconnect the EGR valve position sensor connector.
(g) Disconnect the VSV connector for the ACIS.
(h) Disconnect the VSV connector for the EVAP.
(i) Disconnect the VSV connector for the EGR.
(j) Disconnect the DLC1 from the bracket on the intake air
control valve.
(k) Remove the 2 nuts, and disconnect the PS pressure tube
from the No.1 engine hanger.
(l) Disconnect the PCV hose from the PCV valve on the RH
cylinder head.
(m) Disconnect the ground strap and cable from the intake air
control valve for the ACIS.
(n) Disconnect the ground cable from the air intake chamber.
(o) Disconnect the brake booster vacuum hose from the air
intake chamber.
(p) Disconnect the 2 water bypass hoses from the throttle
body.
(q) Disconnect the air assist hose from the throttle body.
(r) Disconnect the purge hose from the pipe on emission
control valve set.
(s) Disconnect the 2 vacuum hoses from the vacuum tank for
the ACIS.

IN0CI±01
± INTRODUCTIONTERMS
IN±41
41 Author: Date:
GLOSSARY OF SAE AND TOYOTA TERMS
This glossary lists all SAE±J1930 terms and abbreviations used in this manual in compliance with SAE rec-
ommendations, as well as their TOYOTA equivalents.
SAE
ABBREVIATIONSSAE TERMSTOYOTA TERMS
( )±±ABBREVIATIONS
A/CAir ConditioningAir Conditioner
ACLAir CleanerAir Cleaner, A/CL
AIRSecondary Air InjectionAir Injection (AI)
APAccelerator Pedal±
B+Battery Positive Voltage+B, Battery Voltage
BAROBarometric PressureHAC
CACCharge Air CoolerIntercooler
CARBCarburetorCarburetor
CFIContinuous Fuel Injection±
CKPCrankshaft PositionCrank Angle
CLClosed LoopClosed Loop
CMPCamshaft PositionCam Angle
CPPClutch Pedal Position±
CTOXContinuous Trap Oxidizer±
CTPClosed Throttle PositionLL ON, Idle ON
DFIDirect Fuel Injection (Diesel)Direct Injection (DI)
DIDistributor Ignition±
DLC1
DLC2
DLC3Data Link Connector 1
Data Link Connector 2
Data Link Connector 31: Check Connector
2: Total Diagnosis Comunication Link (TDCL)
3: OBD II Diagnostic Connector
DTCDiagnostic Trouble CodeDiagnostic Code
DTMDiagnostic Test Mode±
ECLEngine Control Level±
ECMEngine Control ModuleEngine ECU (Electronic Control Unit)
ECTEngine Coolant TemperatureCoolant Temperature, Water Temperature (THW)
EEPROMElectrically Erasable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory
(EEPROM),
Erasable Programmable Read Only Memory (EPROM)
EFEEarly Fuel EvaporationCold Mixture Heater (CMH), Heat Control Valve (HCV)
EGRExhaust Gas RecirculationExhaust Gas Recirculation (EGR)
EIElectronic IgnitionTOYOTA Distributorless Ignition (TDI)
EMEngine ModificationEngine Modification (EM)
EPROMErasable Programmable Read Only MemoryProgrammable Read Only Memory (PROM)
EVAPEvaporative EmissionEvaporative Emission Control (EVAP)
FCFan Control±
FEEPROMFlash Electrically Erasable Programmable
Read Only Memory±
FEPROMFlash Erasable Programmable Read Only Memory±
FFFlexible Fuel±
FPFuel PumpFuel Pump
GENGeneratorAlternator
GNDGroundGround (GND)