Corolla Wagon L4-96.8 1587cc 1.6L DOHC (4A-FE) (1996)
Air/Fuel Mixture: Testing and Inspection
HINT: This check is used only to determine whether or not the idle CO/HC complies with regulations.
1. INITIAL CONDITIONS
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Engine at normal operating temperature
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Air cleaner installed
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All pipes and hoses of air induction system connected
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All accessories switched OFF
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All vacuum lines properly connected
HINT: All vacuum hoses for EGR systems, etc. should be properly connected.
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SFI system wiring connectors fully plugged
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Ignition timing set correctly
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Transmission in neutral position
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Tachometer and CO/HC meter calibrated by hand
2. START ENGINE
3. RACE ENGINE AT 2,500 RPM FOR APPROX. 180 SECONDS
4. INSERT CO/HC METER TESTING PROBE AT LEAST 40 cm(1.3 ft) INTO TAILPIPE DURING IDLING
5. IMMEDIATELY CHECK CO/HC CONCENTRATION AT IDLE AND/OR 2,500 RPM
HINT: When performing the 2 mode (2,500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.
Troubleshooting
If the CO/HC concentration does not comply with regulations, perform troubleshooting in the order given below.
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Check oxygen sensor operation.