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 (2)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) * | ||||
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