No Trouble Code (NTC) 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(s) that pertains to this symptom. See NO TROUBLE CODE QUICK SYMPTOM TEST MENU table. Perform NTC tests in sequence until driveability problem is found.
NO TROUBLE CODE QUICK SYMPTOM TEST MENU
| Application | Test | ||
|---|---|---|---|
| Hard Start | NTC-2A, 3A, 5A-10A, 12A-13A | ||
| Start & Stall | NTC-2A, 3A, 5A-8A, 12A-13A | ||
| Hesitation/Sag/Stumble | (1) | ||
| Surge | NTC-2A, 3A, 5A-8A, 10A, 12A-13A, 17A, 20A | ||
| Lack Of Power Sluggish | NTC-2A, 8A, 10A, 12A-13A, 17A | ||
| Spark Knock/Detonation | NTC-2A, 3A, 5A-8A, 10A, 12A-13A, 20A | ||
| Cuts Out/Misses | NTC-2A, 3A-5A, 10A, 13A | ||
| Backfire/Pop-Back | NTC-2A, 3A-6A, 8A, 10A, 13A | ||
| Runs Rough, Unstable/Erratic Idle | (1) | ||
| Poor Fuel Economy | (1) | ||
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