Page 1585 of 2543
(d) Connect the tester probe of an ohmmeter to the terminals IDL
and E2 of the sensor.
(e) Gradually turn the sensor clockwise until the ohmmeter
deflects, and secure it with the 2 set screws.
(f) Recheck the continuity between terminals IDL and E2.
Clearance between
lever and stop screw
Continuity (IDL±E2)
0.41 mm (0.016 in.) Continuity
0.48 mm (0.019 in.) No continuity
6. REINSTALL SUB±THROTTLE ACTUATOR
Install the sub±throttle actuator with the 4 screws.
± ENGINESFI SYSTEM (2JZ±GTE)EG±295
Page 1586 of 2543
IDLE AIR CONTROL (IAC) VALVE
ON±VEHICLE INSPECTION
1. INSPECT IAC VALVE FOR OPERATING SOUND
Check that there is a clicking sound immediately after stop-
ping the engine.
If operation is not as specified, check the IAC valve, wiring
and ECM.
2. INSPECT IAC VALVE RESISTANCE
Using an ohmmeter, measure the resistance between the ter-
minals (B1 (or B2) to others).
Resistance:
At 20°C (68°F) 18±24
If resistance is not as specified, replace the IAC valve.
COMPONENTS FOR REMOVAL AND
INSTALLATION
EG±296± ENGINESFI SYSTEM (2JZ±GTE)
Page 1587 of 2543
IAC VALVE REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT IAC VAVE CONNECTOR
3. REMOVE IAC VALVE
(a) Remove the 2 bolts, and disconnect the IAC valve from the
air intake chamber.
(b) Remove the gasket.
(c) Disconnect these hoses from the IAC valve, and remove the
IAC valve:
(1) Air hose
(2) Water bypass hose (from No.2 water bypass pipe)
(3) Water bypass hose (from No.4 water bypass pipe)
(d) Remove the seal washer and check valve.
IAC VALVE INSPECTION
INSPECT IAC VALVE OPERATION
(a) Apply battery voltage to terminals B1 and B2, and while
repeatedly grounding S1±S2±S3±S4±S 1 in sequence, and
check that the valve moves toward the closed position.
(b) Apply battery voltage to terminals B1 and B2, and while
repeatedly grounding S4±S3±S2±S1±S 4 in sequence,
check that the valve moves toward the open position.
If operation is not as specified, replace the IAC valve.
± ENGINESFI SYSTEM (2JZ±GTE)EG±297
Page 1588 of 2543

IAC VALVE INSTALLATION
1. INSTALL IAC VALVE
(a) Install the check valve and seal washer.
NOTICE: Be careful of the check valve and seal washer instal-
lation direction.
(b) Connect these hoses:
wAir hose
wWater bypass hose (from No.2 water bypass pipe)
wWater bypass hose (from No.4 water bypass pipe)
(c) Install a new gasket and the IAC valve with the 2 bolts.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
2. CONNECT IAC VALVE CONNECTOR
3. FILL WITH ENGINE COOLANT
EFI MAIN RELAY
EFI MAIN RELAY INSPECTION
1. REMOVE EFI MAIN RELAY
LOCATION: In the engine compartment relay box.
2. INSPECT EFI MAIN RELAY
A. Inspect relay continuity
(a) Using an ohmmeter, check that there is continuity between
terminals 1 and 2.
(b) Check that there is no continuity between terminals 3 and 5.
If continuity is not as specified, replace the relay.
B. Inspect relay operation
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity between
terminals 3 and 5.
If operation is not as specified, replace the relay.
3. REINSTALL EFI MAIN RELAY EG±298
± ENGINESFI SYSTEM (2JZ±GTE)
Page 1589 of 2543
EFI NO.2 RELAY
EFI NO.2 RELAY INSPECTION
1. REMOVE EFI NO.2 RELAY
LOCATION: In the engine compartment relay box.
2. INSPECT EFI NO.2 RELAY
A. Inspect relay continuity
(a) Using an ohmmeter, check that there is continuity between
terminals 1 and 2.
(b) Check that there is no continuity between terminals 3 and 5.
If continuity is not as specified, replace the relay.
B. Inspect relay operation
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity between
terminals 3 and 5.
If operation is not as specified, replace the relay.
3. REINSTALL EFI NO.2 RELAY
± ENGINESFI SYSTEM (2JZ±GTE)EG±299
Page 1590 of 2543
SOLENOID RESISTOR
COMPONENTS FOR REMOVAL AND
INSTALLATION
SOLENOID RESISTOR INSPECTION
1. DISCONNECT SOLENOID RESISTOR CONNECTOR
2. INSPECT SOLENOID RESISTOR
Using an ohmmeter, measure the resistance between termi-
nal +B and other terminals.
Resistance:
At 20°C (68°F) Approx. 6
If the resistance is not as specified, replace the resistor.
3. RECONNECT SOLENOID RESISTOR CONNECTOR EG±300
± ENGINESFI SYSTEM (2JZ±GTE)
Page 1591 of 2543
VSV FOR FUEL PRESSURE CONTROL
COMPONENTS FOR REMOVAL AND
INSTALLATION
VSV INSPECTION
1. REMOVE VSV
2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity between
the terminals.
Resistance:
At 20°C (68°F) 33±39
If there is no continuity, replace the VSV.
B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity be-
tween each terminal and the body.
If there is continuity, replace the VSV.
± ENGINESFI SYSTEM (2JZ±GTE)EG±301
Page 1592 of 2543
C. Inspect VSV operation
(a) Check that air flows from port E to G.
(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
VSV FOR INTAKE AIR CONTROL VALVE
COMPONENTS FOR REMOVAL AND
INSTALLATION
EG±302± ENGINESFI SYSTEM (2JZ±GTE)