1986 TOYOTA CAMRY V20 engine

(b) (A/T)
Install the throttle cable bracket with the two bolts.
Torque: 130 kg±cm (9 ft±Ib, 13 N±m)
(c) Connect the following hoses:
wPCV hose
wWater by±pass hoses
wEmission control vacuum hoses
2. CONNECT THROTTLE POSITION SENSOR
CONNECTOR
3. INSTALL AIR CLEANER CAP, AIR FLOW METER AND
AIR CLEANER HOSE
(a) Connect the air cleaner hose, and install the air
cleaner cap and air flow meter with the four clips.
(b) Tighten the air cleaner hose clamp bolt.
(c) Connect the air hoses.
(d) Connect the air flow meter connector.
INSTALLATION OF THROTTLE BODY
1. INSTALL THROTTLE BODY
(a) Install a new gasket and the throttle body with the four
(M/T) or three (A/n bolts.
Torque: 130 kg±cm (9 ft±Ib, 13 N±m)
4. CONNECT ACCELERATOR CABLE, AND ADJUST IT
5. (A/T)
CONNECT THROTTLE CABLE, AND ADJUST IT
6. FILL WITH ENGINE COOLANT (See page CO±5)
± EFI SYSTEMAir Induction System (Throttle Body (2VZ±FE))FI±115

(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

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 SYSTEM
Sub±Oxygen Sensor (CALIF. only)FI±131