INSPECTION OF ISC VALVE 1. INSPECT RESISTANCE OF ISC VALVE Using an ohmmeter, measure the resistance between terminal B1 — S1 or S3 and B2 — S2 or S4. Resistance: B1 — S1 or S3 10 — 30 Ω B2 — S2 or S4 10 — 30 Ω If resistance is not as specified, replace the ISC valve. 2. INSPECT OPERATION OF ISC VALVE (a) Apply battery voltage to terminals B1 and B2 and while repeatedly grounding S1 — S2 — S3 — S4 — S1 in sequence, 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 — 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 only 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-lb, 13 N-m} 2. CONNECT AIR HOSE AND AIR NO.2 WATER BY-PASS HOSE 3. CONNECT ISC VALVE CONNECTOR 4. REFILL WITH COOLANT