1. INSPECT ISC VALVE OPERATION
(a) Initial conditions:
• Engine at normal operating temperature
• Idle speed set correctly
(b) Disconnect the ISC valve connector.
(c) Check the engine rpm. Engine rpm: 1,000 rpm or more
(d) Reconnect the ISC valve connector.
(e) Check that they return to the idle speed. Idle speed: 800 ± 50 rpm
If the rpm operation is not as specified, check the ISC valve, wiring and ECU.
2. INSPECT ISC VALVE RESISTANCE
(a) Disconnect the ISC valve connector.
(b) Using an ohmmeter, measure the resistance between terminal + B and other terminals (RSC, RSO).
If resistance is not as specified, replace the ISC valve.
(c) Reconnect the ISC valve connector.
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