Page 1505 of 1807
SF0HC-01
P18728
IAC Valve Connector
IAC Valve
GasketAir Hose
Water Bypass Hose
Water Bypass Hose
Non-reusable partSeal Washer
Check Valve SF-50
- SFI (2JZ-GTE)IDLE AIR CONTROL (IAC) VALVE
1376 Author: Date:
1997 SUPRA (RM502U)
COMPONENTS
Page 1506 of 1807
SF0HD-01
P11386Connector
P11418(1)(2)
(3)
P12820
Check Valve
Seal
Washer
- SFI (2JZ-GTE)IDLE AIR CONTROL (IAC) VALVE
SF-51
1377 Author: Date:
1997 SUPRA (RM502U)
REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT IAC VALVE 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.
Page 1507 of 1807
SF0HE-01
P11389
Battery Closed
B1
S1
S2 B2S3
S4
P11388
Battery B1
S1
S2 B2S3
S4 Open SF-52
- SFI (2JZ-GTE)IDLE AIR CONTROL (IAC) VALVE
1378 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
INSPECT IAC VALVE OPERATION
(a) Apply battery positive voltage to terminals B1 and B2, and
while repeatedly grounding S1 - S2 - S3 - S4 - S1 in se-
quence, and check that the valve moves toward the
closed position.
(b) Apply battery positive voltage to terminals B1 and B2, and
while repeatedly grounding S4 - S3 - S2 - S1 - S4 in se-
quence, check that the valve moves toward the open
position.
If operation is not as specified, replace the IAC valve.
Page 1508 of 1807
SF0HF-01
P11387
Check Valve
Seal
WasherInside
- SFI (2JZ-GTE)IDLE AIR CONTROL (IAC) VALVE
SF-53
1379 Author: Date:
1997 SUPRA (RM502U)
INSTALLATION
1. INSTALL IAC VALVE
(a) Install the check valve and seal washer.
NOTICE:
Be careful of the check valve and seal washer installation
direction.
(b) Connect these hoses:
Air hose
Water bypass hose (from No.2 water bypass
pipe)
Water bypass hose (from No.4 water bypass
pipe)
(c) Install a new gasket and the IAC valve with the 2 bolts.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
2. CONNECT IAC VALVE CONNECTOR
3. FILL WITH ENGINE COOLANT
Page 1509 of 1807
P11276
EFI Main
Relay
SF0HG-01
P07170
Ohmmeter
No
ContinuityContinuity
Ohmmeter 1
35
2
P07171Battery Ohmmeter
Continuity1
35
2 SF-54
- SFI (2JZ-GTE)EFI MAIN RELAY
1380 Author: Date:
1997 SUPRA (RM502U)
EFI MAIN RELAY
INSPECTION
1. REMOVE EFI MAIN RELAY
2. INSPECT EFI MAIN RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3. INSPECT EFI MAIN RELAY OPERATION
(a) Apply battery positive voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL EFI MAIN RELAY
Page 1510 of 1807
P11277
EFI No.2
Relay
SF0HH-01
P07170
Ohmmeter
No
ContinuityContinuity
Ohmmeter 1
35
2
P07171Battery Ohmmeter
Continuity1
35
2
- SFI (2JZ-GTE)EFI NO.2 RELAY
SF-55
1381 Author: Date:
1997 SUPRA (RM502U)
EFI NO.2 RELAY
INSPECTION
1. REMOVE EFI NO.2 RELAY
2. INSPECT EFI NO.2 RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3. INSPECT EFI NO.2 RELAY OPERATION
(a) Apply battery positive voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL EFI NO.2 RELAY
Page 1511 of 1807
SF0HI-01
P11345
Solenoid Resistor
AssemblyCover
Solenoid Resistor
Bracket
Solenoid
Resistor
Connector SF-56
- SFI (2JZ-GTE)SOLENOID RESISTOR
1382 Author: Date:
1997 SUPRA (RM502U)
SOLENOID RESISTOR
COMPONENTS
Page 1512 of 1807
SF0HJ-01
P11451
Ohmmeter#20
#30
#40
#50#10
#60+B
- SFI (2JZ-GTE)SOLENOID RESISTOR
SF-57
1383 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
1. DISCONNECT SOLENOID RESISTOR CONNECTOR
2. INSPECT SOLENOID RESISTOR
Using an ohmmeter, measure the resistance between terminal
+B and other terminals.
Resistance: Approx. 6 W at 20°C (68°F)
If the resistance is not as specified, replace the resistor.
3. RECONNECT SOLENOID RESISTOR CONNECTOR