Page 1129 of 2389
(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
Page 1130 of 2389
(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
Page 1131 of 2389
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
Page 1132 of 2389
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
Page 1133 of 2389
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
Page 1134 of 2389
ELECTRONIC CONTROL SYSTEM
Location of Electronic Control Parts
± EFI SYSTEMElectronic Control System (Location of Electronic Control Parts)FI±120
Page 1135 of 2389
EFI Main Relay
± EFI SYSTEMElectronic Control System (EFI Main Relay)FI±121
Page 1136 of 2389
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