Tacoma PreRunner V6-4.0L (1GR-FE) (2006)
Air/Fuel Mixture: Testing and Inspection
INSPECT CO/HC
a. Start the engine.
b. Run the engine at 2,500 rpm for approximately 180 seconds.
c. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idling.
d. Immediately check the CO/HC concentration during idling and/or at 2,500 rpm.
HINT:
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Complete the measurement within 3 minutes.
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When carrying out the 2 modes (idling and 2,500 rpm) test, the measurement orders are prescribed by the applicable local regulations.
e. If the CO/HC concentration does not comply with regulations, troubleshoot in the order given.
(1) Check the heated oxygen sensor operation.