What should the technician do if RPM is too high during the Idle portion of the TSI test?

• A. Abort the test and get authorization to set idle speed
• B. Lower the idle speed and continue
• C. Ignore the RPM and proceed
• D. Restart the test from the beginning

Answer: (A)

When the engine isn’t at the proper idle speed, the readings from the idle portion of the test won’t reflect normal idle operation, so the results can’t be trusted. The testing protocol requires the idle RPM to be within a specific, stable range before continuing, to ensure the emissions data are valid. If the RPM is too high, you should abort the test and obtain authorization to set the idle speed to the correct specification. This step keeps the test within approved procedures and prevents invalid results from proceeding. After authorization, you adjust the idle to the specified value, confirm it stays steady, and then resume the test. Lowering the idle without authorization, ignoring the RPM and proceeding, or restarting without addressing the idle condition wouldn’t fix the underlying issue and could lead to inaccurate results.