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 TEST TC-1A is reviewed before attempting to diagnose a symptom.
Select symptom that most accurately describes vehicle's driveability problem and then perform test pertaining to this symptom. Perform each test in sequence until a problem is found. Refer to the NO TROUBLE CODE QUICK SYMPTOM TEST MENU table.
NO TROUBLE CODE QUICK SYMPTOM TEST MENU
| Application/Symptom | Perform Following Test in the TESTS W/CODES article | ||
|---|---|---|---|
| Hard Start | NTC-2A, 3A-8A, 10A, 11A, 12A | ||
| Start & Stall | NTC-2A, 3A-6A, 8A, 10A, 12A | ||
| Hesitation/Sag/Stumble | (1) | ||
| Surge | NTC-2A, 3A-8A, 10A, 12A | ||
| Lack Of Power/Sluggish | NTC-2A, 3A-8A, 10A, 11A, 12A | ||
| Spark Knock/Detonation | NTC-2A, 3A-7A, 11A, 12A | ||
| Cuts Out/Misses | NTC-2A, 3A, 7A, 10A, 11A, 12A | ||
| Backfire/Popback | NTC-2A, 3A, 6A, 7A, 10A, 11A, 12A | ||
| Runs Rough/Unstable/Erratic Idle | (1) | ||
| Poor Fuel Economy | (1) | ||
|
|||