No Trouble Code Quick Symptom Test
Symptom checks cannot be used properly unless the driveability problem characteristic actually happens while the vehicle is being tested. To reduce diagnostic time, ensure that TEST TC-1A is reviewed before attempting to diagnose a symptom.
Select the symptom that most accurately describes the vehicle's driveability problem and then perform the 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 | ||
|---|---|---|---|
| Hard Start | NTC-2A , 3A-8A , 11A , 14A , 15A | ||
| Start & Stall | NTC-2A , 3A-6A , 8A , 11A , 15A | ||
| Hesitation/Sag/Stumble | (1) * | ||
| Surge | NTC-2A , 3A-8A , 11A , 12A , 15A | ||
| Lack Of Power/Sluggish | NTC-2A , 3A-8A , 11A , 13A , 15A | ||
| Spark Knock/Detonation | NTC-2A , 3A-9A , 11A , 12A , 15A | ||
| Cuts Out/Misses | NTC-2A , 3A , 7A , 9A , 11A , 13A , 15A | ||
| Backfire/Pop-Back | NTC-2A , 3A , 6A , 7A , 11A , 13A , 15A | ||
| Runs Rough/Unstable/Erratic Idle | (1) * | ||
| Poor Fuel Economy | (1) * | ||
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