Toyota Supra 1990 Manual page 281

EFI SYSTEM - Air Induction System
FI-107
n
84 B2
83 B1
n
82
81
E9
e
Battery
E9 e
Battery
Check Valve
J/"W'~ ~)
~TEonIY
FI1694
FI1643
FI1643
\
FI4207
INSPECTION OF ISC VALVE
1 . INSPECT RESISTANCE OF ISC VALVE
Using an ohmmmeter, measure the resistance between ter-
minal 81 - S1 or S3 and 82 - S2 or S4.
Resistance: B1 - 51 or 53 10 - 30 0
82 - S2 or S4 10 - 30 0
If resistance is not as specified, replace the ISC valve.
2. INSPECT OPERATION OF ISC VALVE
(a) Apply battery voltage to terminals 81 and 82 and
while repeatedly grounding S 1 - S2 - S3 - S4 -
S 1 in sequence, check that the valve moves toward
the closed position.
(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.
INSPECTION OF CHECK VALVE (7M-GTE only)
Inspect the check valve for damage and the diaphragm for
cracks.
If necessary, replace the check valve.
INSTALLATION OF ISC VALVE
1 . INSTALL ISC VALVE
(a)
(7M-GTE)
Install the check valve and seal washer as shown in
the illustration, to the air intake chamber.
(b) Connect the No.1 water by-pass hose to the ISC valve.
(c) Install a new gasket and ISC valve with the two bolts.
Torque: 130 kg-cm (9 ft-Ib, 13 N ·m)
2. CONNECT AIR HOSE AND AIR NO.2 WATER BY-PASS
HOSE
3. CONNECT ISC VALVE CONNECTOR
4. REFILL WITH COOLANT