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6E–94 ENGINE DRIVEABILITY AND EMISSIONS Idle Air Control (IAC) System Check
Step Action Value(s) Yes No 1 1. Ignition “OFF.” the IAC is cycled. Does the RPM change? — Go to Step 2 Go to Step 3 2 RPM should change smoothly. Does the RPM change within the range specified? 700-1500 RPM — Go to Step 3 3 Check the IAC passages. Are the IAC passages OK? — Go to Step 4 Go to Step 5 4 Clear any obstruction from the IAC passages. Is the action complete? — Verify repair — 5 Replace the IAC. Refer to On-Vehicle Service, Idle Air Control Valve. Is the action complete? — Verify repair — |