TOYOTA CAMRY V20 1986 Service Information

INSTALLATION OF ISC VALVE
1. INSTALL ISC VALVE
(a) Place a new gasket on the throttle body.
REMOVAL OF ISC VALVE
1. REMOVE THROTTLE BODY
(See steps 1 to 7 on page FI±107)
2. REMOVE ISC VALVE
Remove the four screws, ISC valve and gasket.
2. INSTALL THROTTLE BODY
(See steps 2 to 8 on page FI±109) (b) Install the ISC valve with the four screws.
± EFI SYSTEMAir Induction System (Idle Speed Control (ISC) Valve(3S FE))
FI±117

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

ELECTRONIC CONTROL SYSTEM
Location of Electronic Control Parts
± EFI SYSTEMElectronic Control System (Location of Electronic Control Parts)FI±120

EFI Main Relay
± EFI SYSTEMElectronic Control System (EFI Main Relay)FI±121

INSPECTION OF EFI MAIN RELAY
1. INSPECT RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity between
terminals 1 and 3.
(b) Check that there is no continuity between terminals 2
and 4.
If continuity is not as specified, replace the relay.
2. INSPECT RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 3.
(b) Using an ohmmeter, check that there is continuity between
terminals 2 and 4.
If operation is not as specified, replace the relay.
± EFI SYSTEMElectronic Control System (EFI Main RelayFI±122

INSPECTION OF CIRCUIT OPENING
RELAY
1. INSPECT RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity
between terminals STA 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 STA and E1.
(b) Using an ohmmeter, check that there is continuity between
terminals B and FP.
(c) Apply battery voltage across terminals B and FC.
(d) Check that there is continuity between terminals B
and FP.
If operation is not as specified, replace the relay.
Circuit Opening Relay
± EFI SYSTEMElectronic Control System (Circuit Opening Relay)FI±123

3S±FE STA ± STJ
20 ± 40
below 30°C (86°F)
40 ± 60
above 40°C (I04°F)
STA ± Ground
20 ± 80

2VZ±FE STA ± STJ
25 ± 45
below 15°C (59°F)
65 ± 85
above 30°C (86°F)
STA ± Ground
25 ± 85

If the resistance is not as specified, replace the switch.
INSPECTION OF COLD START INJECTOR
TIME SWITCH
INSPECT RESISTANCE OF COLD START INJECTOR TIME
SWITCH
Using an ohmmeter, measure the resistance between each ter-
minal.
Resistance:
Cold Start Injector Time Switch
± EFI SYSTEMElectronic Control System (Cold Start Injector Time Switch)FI±124

INSPECTION OF WATER TEMPERATURE
SENSOR
INSPECT RESISTANCE OF WATER TEMPERATURE
SENSOR
Using an ohmmeter, measure the resistance between the
terminals.
Resistance: Refer to chart
If the resistance is not as specified, replace the sensor.
Water Temperature Sensor
± EFI SYSTEMElectronic Control System (Water Temperature Sensor)FI±125

INSPECTION OF EGR GAS TEMPERATURE
SENSOR
INSPECT EGR GAS TEMPERATURE SENSOR
Using an ohmmeter, measure the resistance between the terminals.
Resistance:
69.40 ± 88.50 k
at 50° C (11210 F)
11.89 ±14.37 k
at 100° C (212° F)
2.79 ± 3.59 k
at 150° C (302° F)
If the resistance is not as specified, replace the sensor.
EGR Gas Temperature Sensor
(CALIF. only)
± EFI SYSTEMElectronic Control System (EGR Gas Temperature Sensor
(CALIF. only)FI±126