No Trouble Code Quick Symptom Test
Symptom checks cannot be used properly unless driveability problem characteristic actually happens while vehicle is being tested. To reduce diagnostic time, ensure that DTC TEST is reviewed before attempting to diagnose a symptom.
Select symptom that most accurately describes vehicle's driveability problem and then perform test that pertains to this symptom. Perform each test in sequence until problem is found. See NO TROUBLE CODE QUICK SYMPTOM TEST MENU table.
NO TROUBLE CODE QUICK SYMPTOM TEST MENU
| Application | Test | ||
|---|---|---|---|
| Backfire/Pop-Back | NTC-2A, 3A, 6A-7A, 11A, 14A, 22A | ||
| Cuts Out/Misses | NTC-2A, 3A, 7A, 11A, 14A, 22A | ||
| Hard Start | NTC-2A, 3A-7A, 9A, 11A, 16A, 22A | ||
| Hesitation/Sag/Stumble | (1) | ||
| Lack Of Power/ Sluggish | NTC-2A, 3A-7A, 9A, 11A-12A, 14A, 22A | ||
| Poor Fuel Economy | (1) | ||
| Runs Rough/Unstable/Erratic Idle | (1) | ||
| Spark Knock/Detonation | NTC-2A, 3A-7A, 9A, 11A, 22A | ||
| Start & Stall | NTC-2A, 3A-6A, 9A, 11A, 22A | ||
| Surge | NTC-2A, 3A-7A, 9A, 11A-12A, 22A | ||
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