O2 sensor TOYOTA CAMRY 2000 Service Workshop Manual

(b) Apply vacuum to the throttle opener.
(c) Insert a 0.60 mm (0.024 in.) thickness gauge between
the throttle stop screw and stop lever.
(d) Connect the test probe of an ohmmeter to the termi±
nals IDL and E2 of the sensor.
(e) Gradually turn the sensor clockwise until the ohmmeter
deflects, and secure it with the 2 set screws. 3. INSPECT THROTTLE POSITION SENSOR
(a) Apply vacuum to the throttle opener.
(b) Insert a thickness gauge between the throttle stop
screw and stop lever.
(c) Using an ohmmeter, measure the resistance between
each terminal. 2. INSPECT THROTTLE VALVE
(a) Apply vacuum to the throttle opener.
(b) Check that there is no clearance between the throttle
stop screw and throttle lever when the throttle valve
is fully closed.
4. IF NECESSARY, ADJUST THROTTLE POSITION
SENSOR
(a) Loosen the 2 set screws of the sensor.
Clearance between
lever and stop screw
Throttle valve fully
open 0.50 mm (0.020 in.)
0.70 mm (0.028 in.)Between terminals
2.0 ± 10.2 k
2.3 k
or less 0.2 ± 5.7 k

0 mm (0 in.)
2.5 ± 5.9 k
Resistance
VTA ± E2
VTA ± E2IDL±E2IDL±E2
Infinity
VC ± E2
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±209

(c) Type A:
Install the throttle body with the 4 bolts.
Torque: 19 N±m (195 kgf±cm, 14 ft±lbf)
Bolt length:
A 45 mm (1.77 in.)
B 55 mm (2.17 in.)
(d) Type B:
Install the throttle body with the 2 bolts and 2 nuts.
Torque: 19 N±m (195 kgf±cm, 14 ft±lbf)
3. INSTALL AIR CLEANER CAP, RESONATOR AND
AIR CLEANER HOSE
(a) Connect the air cleaner hose to the throttle body.
(b) Install the air cleaner cap together with the resonator
and air cleaner hose.
(c) California only:
Connect the air hose to the air cleaner hose.
(d) Connect the intake air temperature sensor connector.
4. A/T:
CONNECT AND ADJUST THROTTLE CABLE
5. CONNECT AND ADJUST ACCELERATOR CABLE
6. FILL WITH ENGINE COOLANT
7. CONNECT NEGATIVE (±) TERMINAL CABLE TO
BATTERY (e) Connect the following hoses to the throttle body:
(1) PCV hose
(2) 2 vacuum hoses from EGR vacuum modulator
(3) Vacuum hose from TVV (for EVAP)
(f) Connect the IAC valve connector.
(g) Connect the throttle position sensor connector.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±211

3. INSPECT ECT SENSOR RESISTANCE
Using an ohmmeter, measure the resistance between
the terminals.
Resistance:
Refer to the graph above
If the resistance is not as specified, replace the
sensor.
4. REINSTALL ECT SENSOR
5. FILL WITH ENGINE COOLANT
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR
ECT SENSOR INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE ECT SENSOR
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2. INSPECT IAT SENSOR RESISTANCE
Using an ohmmeter, measure the resistance between
the terminals.
Resistance:
Refer to the graph above
If the resistance is not as specified, replace the
sensor.
3. REINSTALL IAT SENSOR
INTAKE AIR TEMPERATURE (IAT)
SENSOR
IAT SENSOR INSPECTION
1. REMOVE IAT SENSOR
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±220

MAP SENSOR INSPECTION
1. INSPECT POWER SOURCE VOLTAGE OF MAP
SENSOR
(a) Disconnect the MAP sensor connector.
(b) Turn the ignition switch ON.
(c) Using a voltmeter measure the voltage between con±
nector terminals VC and E2 of the wiring harness side.
Voltage:
4.75 ± 5.25 V
(d) Reconnect the MAP sensor connector.
MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR
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2. INSPECT POWER OUTPUT OF MAP SENSOR
(a) Turn the ignition switch ON.
(b) Disconnect the vacuum hose on the air intake cham±
ber side.
(c) Connect a voltmeter to terminals PIM and E2 of the
ECM, and measure the output voltage under ambient
atmospheric 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.
Voltage drop:
Applied
Vacuum
kPa
(mmHg
in.Hg)66.7
( 500
19.69) 53.5
( 400
15.75) 40.0
( 300
111.8) 13.3
(100
3.94 )26.7
(200
7.87)
Voltage
drop V0.7±0.9
0.3±0.5
1.1 ±1.3 1.5 ± 1.71.9 ± 2.1
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2. INSPECT EGR GAS TEMPERATURE SENSOR
Using an ohmmeter, measure the resistance between
the terminals.
Resistance:
64±97 k
at 50
C (122
F)
11±16 k
at 100
C (212
F)
2±4 k
at 150
C (302
F)
If the resistance is not as specified, replace the
sensor.
EGR GAS TEMPERATURE SENSOR
INSPECTION
1. REMOVE EGR GAS TEMPERATURE SENSOR
EGR GAS TEMPERATURE SENSOR
3. REINSTALL EGR GAS TEMPERATURE SENSOR
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±230

OXYGEN SENSOR
OXYGEN SENSOR INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating
temperature.
2. INSPECT FEEDBACK VOLTAGE
Connect the positive (+) probe of a voltmeter to
terminal VF1 of the data link connector 1 and nega±
tive (±) probe to terminal E1. Perform the test as
follows:
Using SST, connect terminals TE1 and E1 of the data link
connector 1.
SST 09843±18020
And maintain engine speed at 2,500 rpm.
Warm up the oxygen sensor with the engine at 2,500 rpm
for approx. 90 seconds. And maintain engine speed at
2,500 rpm.Warm up the oxygen sensor with the engine at 2,500 rpm
for approx. 90 seconds.
CONTINUED ON PAGE EG1±232
Disconnect terminals TE1 and E1 of the data link
connector 1. And maintain engine speed at 2,500 rpm. Check the number of times the voltmeter needle fluctuates
in 10 seconds.Zero again After replacing
1 the oxygen sensor
Check the number of times the voltmeter needle fluctuates in 10 seconds.
Read and record diagnostic trouble codes. (See page EG1±297)
Malfunction code(s)
(Ex. code Nos. 21, 25 and 26) Measure voltage between terminals VF1 and E1.
Repair the relevant diagnostic trouble code.
Normal code, code
Nos. 21, 25 and 26Replace the ECM.
Less than 8 timesLess than 8 times
8 times or more
More than 0 V8 times
or more
NormalZero
Zero
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Disconnect the engine coolant temp. sensor connector and
connect resistor with a resistance of 4 ± 8 k

or send an
equivalent simulation signal.
Warm up the oxygen sensor with the engine at 2,500 rpm for
approx. 90 seconds. And maintain engine at 2,500 rpm.Disconnect terminals TE1 and E1 of the data link connector 1.
And maintain engine at 2,500 rpm.
CONTINUED FROM PAGE EG1±231
Read and record diagnostic trouble codes. (See page
EG1±297)
Connect terminals TE1 and E1 of the data link connector 1.Malfunction code(s)
(Ex. code Nos. 21, 25 and 26)
Measure voltage between terminals VF1 and E1.
Measure voltage between terminals VF1 and E1, Measure voltage between terminals VF1 and E1.Repair the relevant diagnostic trouble code.
Normal code, code Nos.
21, 25 and 26
Replace the oxygen sensor. Disconnect the PCV hose.
Repair (Over Lean) Repair (Over rich)More than 0 V
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±232

SUB OXYGEN SENSOR
SUB OXYGEN SENSOR INSPECTION
INSPECT SUB OXYGEN SENSOR
HINT: Inspect only when code No. 27 is displayed.
(a) Cancel the diagnostic trouble code. (See page EG1±299)
(b) Warm up the engine until it reaches normal operating
temperature.
(c) M/T:
Drive for 5 minutes or more at a speed less than 80
km/h (50 mph) in 4th or 5th gear.
A/T:
Drive for 5 minutes or more at a speed less than 80
km/h (50 mph) in ªDº position.
(d) Following the conditions in step (c), fully depress on
the accelerator pedal for 2 seconds or more.
(e) Stop the vehicle and turn the ignition switch OFF.
(f) Carry out steps (b), (c) and (d) again to test accelera±
tion. If code No.27 appears again, check the sub oxygen
sensor circuit. If the circuit is normal, replace the sub
oxygen sensor.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±233