check engine TOYOTA CAMRY V20 1986 Service Information

(e) Install a new O±ring to the injector.
(f) Connect SST (union and hose) to the injector, and hold
the injector and union with SST (clamp).
SST 09268±41045
(g) Put the injector into the graduated cylinder.
HINT: Install a suitable vinyl hose onto the injector to
prevent gasoline from splashing out.
(h) Reconnect the battery negative (±) cable.
(i) Turn the ignition switch ON.
NOTICE: Do not start the engine.
Using SST, connect terminals +B and FP of the check
connector.
SST 09843±18020
2. INSPECT LEAKAGE
(a) In the condition above, disconnect the test probes of
SST (wire) from the battery and check the fuel leakage
from the injector.
SST 09842±30070
Fuel drop: One drop or less per minute
(b) Disconnect the battery negative (±) cable.
(c) Remove SST.
SST 09268±41045 and 09843±18020 (k) Connect SST (wire) to the injector and battery for 15
seconds, and measure the injection volume with a
graduated cylinder. Test each injector two or three
times.
SST 09842±30070 .
Volume: 45 ± 55 cc (2.7 ± 3.4 cu in.) per 15 sec.
Difference between each injector:
5 cc (0.3 cu in.) or less
If the injection volume is not as specified, replace the injec-
tor.
± EFI SYSTEMFuel System (Injectors (212±FE))FI±97

2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the sensor connector.
(b) Insert a feeler gauge between the throttle stop screw and
stop lever.
(c) Using an ohmmeter, measure the resistance between each
terminal.
ON±VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at each port.
wStart the engine.
wCheck the vacuum with your finger.
Throttle Body (3S±FE w o ECT)
Other than idling
No vacuum
No vacuum No vacuum
No vacuum Port nameAt idling
Vacuum
Vacuum
VacuumVacuum
± EFI SYSTEMAir Induction System (Throttle Body (3S±FE w o ECT))FI±106

(b) Connect the following hoses:
wPCV hose
wWater by±pass hoses
wAir tube hose
wEmission control vacuum hoses
3. CONNECT ISC VALVE CONNECTOR
4. CONNECT THROTTLE POSITION SENSOR
CONNECTOR
5. CONNECT AIR CLEANER HOSE
6. CONNECT ACCELERATOR CABLE, AND ADJUST IT
7. (A/T)
CONNECT THROTTLE CABLE, AND ADJUST IT
8. FILL WITH ENGINE COOLANT (See page CO±5)
INSTALLATION OF THROTTLE BODY
1. INSTALL ISC VALVE TO THROTTLE BODY
(See page FI±117)
2. INSTALL THROTTLE BODY
(a) Install a new gasket and the throttle body with the four bolts.
Torque: 195 kg±cm (14 ft±Ib, 19 N±m)
(b) Insert a 0.70 mm (0.028 in.) feeler gauge, between the
throttle stop screw and stop lever.
(c) Connect the test probe of an ohmmeter to the terminals
IDL and E1 of the sensor.
(d) Gradually turn the sensor clockwise until the ohmme±
ter deflects, and secure it with the two set screws.
(e) Recheck the continuity between terminals IDL and E2.
Clearance between lever
and stop screwContinuity (IDL ± El)
0.90 mm (0.035 in.) 0.50 mm (0.002 in.)
No continuityContinuity
± EFI SYSTEMAir Induction System (Throttle Body (3S±FE w o ECT))FI±109

2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the sensor connector.
(b) Insert a feeler gauge between the throttle stop screw and
stop lever.
(c) Using an ohmmeter, measure the resistance between each
terminal.
ON±VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at each port.
wStart the engine.
wCheck the vacuum with your finger.
Throttle Body (2VZ±FE)
Other than idling
No vacuum No vacuum
No vacuum Port nameAt idling
Vacuum
Vacuum
Vacuum
± EFI SYSTEMAir Induction System (Throttle Body (2VZ±FE))FI±112

(b) Using SST, connect terminals TE1 and E1 of the check
connector.
SST 09843±18020
(c) After engine rpm are kept at 1,000 ± 1,300 rpm for 5
seconds, check that they return to idle speed.
If the rpm operation is not as specified, check the ISC
valve, wiring and ECU.
(d) Remove the service wire.
2. INSPECT ISC VALVE RESISTANCE
(a) Disconnect the ISC valve connector.
(b) Using an ohmmeter, measure the resistance between termi-
nal +B and other terminals (ISC1, ISC2).
Resistance: 16.0 ± 17.0


If the resistance is not as specified, replace the ISC valve.
(c) Reconnect the ISC valve connector.
ON±VEHICLE INSPECTION
1. INSPECT ISC VALVE OPERATION
(a) Initial conditions:
wEngine at normal operating temperature
wIdle speed set correctly
wTransmission in ºNº range
Idle Speed Control (ISC) Valve
(3S±FE)
± EFI SYSTEMAir Induction System (Idle Speed Control (ISC) Valve (3S±FE)FI±116

2. INSPECT ISC VALVE RESISTANCE
(a) Disconnect the ISC valve connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal 131 ± S1 or S3, and B2 ± S2 or S4.
Resistance: B1 ± S1 or S3 10 ± 30


B2 ± S2 or S4 10 ± 30

If the resistance is not as specified, replace the ISC valve.
(c) Reconnect the ISC valve connector.
REMOVAL OF ISC VALVE
1. DRAIN ENGINE COOLANT (See page CO±5)
2. DISCONNECT ISC VALVE CONNECTOR
3. DISCONNECT AIR HOSE AND TWO WATER BY±PASS
HOSES
ON±VEHICLE INSPECTION
1. CHECK FOR OPERATING SOUND FROM ISC VALVE
Check that there is a clicking sound immediately stopping
the engine.
Idle Speed Control (ISC) Valve
(2VZ±FE)
± EFI SYSTEMAir Induction System (Idle Speed Control (ISC) Valve (2VZ±FE))FI±118

INSTALLATION OF ISC VALVE
1. INSTALL ISC VALVE
(a) Install a new gasket and the ISC valve with the two bolts.
Torque: 130 kg±cm (9 ft±Ib, 13 N±m)
(b) Connect the wire harness clamp with the nut.
INSPECTION OF ISC VALVE
INSPECT ISC VALVE OPERATION
(a) Apply battery voltage to terminals 81 and B2, and while re-
peatedly grounding S1 ± S2 ± S3 ± S4 ±
S1 in sequence, check that the valve moves to¿¿rd the
closed position.
2. CONNECT TWO WATER BY±PASS HOSES AND AIR
HOSE
3. CONNECT ISC VALVE CONNECTOR
4. FILL WITH ENGINE COOLANT (See page CO±5) (b) Apply battery voltage to terminals 81 and 82, and while
repeatedly grounding S4 ± S3 S2 ± S 1 ±
S4 in sequence, check that the valve moves toward
the open position.
If operation is not as specified, replace the ISC valve. 4. REMOVE ISC VALVE
(a) Remove the nut, and disconnect the wire harness clamp.
(b) Remove the two bolts, ISC valve and gasket.
± EFI SYSTEMAir Induction System (Idle Speed Control (ISC) Valve(2VZ FE))
FI±119

Main Oxygen Sensor
INSPECTION OF OXYGEN SENSOR
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 check connector, and negative (±) probe to terminal
E1. Perform the test as follows:
Warm up the oxygen sensor with the engine at 2,500
rpm for approx. 90 seconds. And maintain engine at
2,500 rpm.
Normal code, code Nos. Malfunction code(s)
21, 25 and 26 (Ex. code Nos. 21, 25 and 26y Warm up the oxygen sensor with the engine at 2,500
rpm for approx. 90 seconds.
Disconnect terminals TE1 and E1 of the check connector.
And maintain engine speed at 2,500 rpm.Connect terminals TE1 and E1 of the check connector.
And maintain engine speed at 2,500 rpm.
Check the number of times the voltmeter needle
fluctuates in 10 seconds.Check the number of times the voltmeter needle fluctuates in 10 seconds.
Read and record diagnostic codes. (See page FI±25 or 27)Zero again After replacing
the oxygen sensor
Measure voltage between terminals VF 1 and E 1.
Repair the relevant diagnostic code.
CONTINUED ON PAGE FI±30Less than 8 times
Less than 8 timesReplace the ECU.
8 times of more
More than 0 V
8 times or
more
NormalZero
Zero
± EFI SYSTEMElectronic Control System (Main Oxygen Sensor)FI±129

Warm up the oxygen sensor with the engine at 2,500
rpm for approx. 90 seconds. And maintain engine speed at
2,500 rpm.Disconnect the water temp. sensor connector and connect
resistor with a resistance of 4 ± 8 k

or another coded
water temp. sensor.Disconnect terminals TE1 and E1 of the check connector.
And maintain engine at 2,500 rpm.
Measure voltage between terminals VF 1 and El.Rear record diagnostic codes. (See page FI±25 or 27) CONTINUED FROM PAGE FI±129
Malfunction code(s)
(Ex. code Nos. 21, 25 and 26)
Connect terminals TE1 and E1 of the check connector. Measure voltage between terminals VF 1 and E 1 .Measure voltage between terminals VF 1 and El.Normal code, code Nos.
21, 25 and 26 Repair the relevant diagnostic code.
Disconnect the PCV hose.
Replace the oxygen sensor.Repair (Over rich)
Repair (Over lean) More than 0 V
± EFI SYSTEMElectronic Control System (Main Oxygen SensorFI±130

Sub±Oxygen Sensor (CALIF. only)
INSPECTION OF SUB±OXYGEN
SENSOR
INSPECT SUB±OXYGEN SENSOR
HINT: Inspect only when code No.27 is displayed.
(a) Diagnostic code cancellation.
(See page FI±24)
(b) Warm up the engine until it reaches normal operating
temperature.
(a) (M/T)
Drive for 5 minutes or more between 80 km/h (50
mph) and 100 km/h in 4th or 5th gear.
(A/T)
Drive for 5 minutes or more between 80 km/h (50
mph) and 100 km/h (62 mph) in ºDº range.
(d) Following the conditions in step (e), press fully on the
accelerator pedal for 2 seconds or more.
HINT: Do not exceed 100 km/h (62 mph), or diagnostic code
will be cancelled.
(e) Stop the vehicle and turn the ignition switch to OFF.
(f) Carry out steps (b), (c) and (d) again to test acceleration.
If code No. 27 reappears again, check the sub±oxygen sensor
circuit. If the circuit is normal, replace the suboxygen sen-
sor. 3. (2VZ±FE)
INSPECT HEATER RESISTANCE OF OXYGEN
SENSOR
Using an ohmmeter, measure the resistance between the
terminal +B and HT.
Resistance (Cold): 5.1 6.3
at 20°C (68°F)
If the resistance is not as specified, replace the sensor.
± EFI SYSTEMElectronic Control System (Main Oxygen SensorFI±131