No Trouble Code Quick Symptom Test
Symptom checks cannot be used properly unless driveability problem occurs while vehicle is being tested. To reduce diagnostic time, ensure DTC TEST is reviewed before attempting to diagnosis a symptom. Select symptom which most accurately describes the driveability problem, and then perform test pertaining to the 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 | ||
|---|---|---|---|
| Hard Start | NTC-2A, 3A, 4A, 5A, 6A, 7A, 9A, 12A, 13A, 14A, 15A, 16A, 17A or 17B & 18A | ||
| Start & Stalls | NTC-2A, 3A, 4A, 5A, 6A, 9A, 11A & 17A or 17B | ||
| Hesitation/Sag/Stumble | (1) | ||
| Surge | NTC-2A, 3A, 4A, 5A, 6A, 7A, 9A, 11A, 12A & 17A or 17B | ||
| Lack Of Power/Sluggish | NTC-2A, 3A, 4A, 5A, 6A, 7A, 9A, 11A, 13A, 16A & 17A or 17B | ||
| Spark Knock/Detonation | NTC-2A, 3A, 4A, 5A, 6A, 7A, 9A, 11A, 12A, 16A & 17A or 17B | ||
| Cuts Out/Misses | NTC-2A, 3A, 7A, 11A, 13A & 17A or 17B | ||
| Backfire/Popback | NTC-2A, 3A, 6A, 7A, 11A, 13A, 16A & 17A or 17B | ||
| Runs Rough/Unstable Idle/Erratic Idle | (1) | ||
| Poor Fuel Economy | (1) | ||
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