check engine TOYOTA CAMRY 2000 Service Owners Manual

CIRCUIT OPENING RELAY INSPECTION
1. INSPECT RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity
between terminals ST and E1.
(b) Check that there is continuity between terminals +B
and FC.
(c) Check that there is no continuity between terminals +
B and FP.
If continuity is not as specified, replace the relay.
2. INSPECT RELAY OPERATION
(a) Apply battery voltage across terminals ST and E1.
(b) Using an ohmmeter, check that there is continuity
between terminals +B and FP.
If operation is not as specified, replace the relay.
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VSV INSPECTION (California)
1. REMOVE VSV
(a) Disconnect the following connectors and hoses:
(1) VSV for EGR (A) connector
(2) VSV for fuel pressure control (B) connector
(3) Vacuum hose (from EGR valve) from port E of
VSV (A)
(4) Vacuum hose (from port ªQº of EGR vacuum
modulator) from port G of VSV (A)
(5) Vacuum hose (from fuel pressure regulator) from
port E of VSV (B)
(6) Vacuum hose (from air intake chamber) from port
G of VSV (B)
(b) Remove the bolt and VSV assembly.
2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity
between the terminals.
Resistance (Cold):
33±39

If there is no continuity, replace the VSV.
VSV FOR EGR
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VSV INSPECTION (Except California)
1. REMOVE VSV
(a) Disconnect the following connector and hoses:
(1) VSV connector
(2) Vacuum hose (from EGR valve) from port E of
VSV
(3) Vacuum hose (from port ªaº of EGR vacuum
modulator) from port G of VSV
(b) Remove the bolt and VSV.
2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity
between the terminals.
Resistance (Cold):
33±39

If there is no continuity, replace the VSV. B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity
between each terminal and the body.
If there is continuity, replace the VSV.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from port E to the filter.
If operation is not as specified, replace the VSV.
3. REINSTALL VSV C. Inspect VSV operation
(a) Check that air flows from port E to port G.
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B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity
between each terminal and the body.
If there is continuity,. replace the VSV.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from port E to the filter.
If operation is not as specified, replace the VSV.
3. REINSTALL VSVC. Inspect VSV operation
(a) Check that air flows from port E to port G.
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VSV INSPECTION
1. REMOVE VSV
(a) Disconnect the following connectors and hoses:
(1) VSV for EGR (A) connector
(2) VSV for fuel pressure control (B) connector
(3) Vacuum hose (from EGR valve) from port E of VSV (A)
(4) Vacuum hose (from port ªaº of EGR vacuum
modulator) from port G of VSV (A)
(5) Vacuum hose (from fuel pressure regulator) from
port E of VSV (B)
(6) Vacuum hose (from air intake chamber) from port
G of VSV (B)
(b) Remove the bolt and VSV assembly.
2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity
between the terminals.
Resistance (Cold):
33±39

If there is no continuity, replace the VSV.
VSV FOR FUEL PRESSURE CONTROL
(California only)
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B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity
between each terminal and the body.
If there is continuity, replace the VSV.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from pipe E to the filter.
If operation is not as specified, replace the VSV. C. Inspect VSV operation
(a) Check that air flows from pipe E to pipe G.
3. REINSTALL VSV
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±227

A/C IDLE± UP VALVE INSPECTION
1. REMOVE IDLE±UP VALVE
(a) Disconnect the following connector and hoses:
(1) Idle±up valve connector
(2) Air hose from air intake chamber
(3) Air hose from air tube
(b) Remove the 2 bolts and idle±up valve together with
the 2 air hoses.
(c) Disconnect the 2 air hoses from the idle±up valve.
2. INSPECT IDLE±UP VALVE
A. Inspect idle±up valve for open circuit
Using an ohmmeter, check that there is continuity
between the terminals.
Resistance (Cold):
30±34

If there is no continuity, replace the idle±up valve.
B. Inspect idle±up valve for ground
Using an ohmmeter, check that there is no continuity
between each terminal and the body.
If there is continuity, replace the idle±up valve.
A±C IDLE±UP VALVE
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(b) Apply battery voltage across the terminals.
(c) Check that air flows from port E to port F.
If operation is not as specified, replace the idle±up
valve. C. Inspect idle±up valve operation
(a) Check that air does not flow from port E to port F.
3. REINSTALL IDLE± UP VALVE
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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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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.
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