Millenia L V6-2.5L DOHC (1997)
4. Adjust the idle speed by turning the air adjusting screw.
Caution: The throttle adjusting screw is set at the factory and must not be adjusted. Any adjustment will negatively affect the engine
performance.
5. Disconnect the SST.
6. Verify that the idle speed is within the specification with the load condition.
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If not as specified with all load conditions, inspect the IAC valve.
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If not as specified with some load conditions, inspect the related input switches, harness and connectors.
Idle Mixture
1. Perform "Preparation" above.
2. Verify that the idle speed and ignition timing are within the specification.
3. Insert an exhaust gas analyzer to the tailpipe.
4. Verify that the CO and HC concentrations are within the specified limits.
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If not within the specified limits, inspect the following.
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OBD system
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H02S
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Intake-air system
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Fuel system
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ESA control system
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If the systems are normal, replace the TWC and/or the warm up TWC.
