Reference Value Symptom Chart
The Reference Value Symptom Chart provides guidance in selecting the appropriate parameter identification (PID) or measured signal related to the fault area. Select a symptom from the symptom chart along with the category number and go to the PID/MEASURED SIGNAL CHART . For multiple symptoms, select the symptom that is most evident.
SYMPTOM CHART
| Symptom occurs during | Symptom | Category Number |
|---|---|---|
| STARTUP: | No Start/Vehicle Disabled | 0 |
| No Start/Normal Crank | 1 | |
| IDLE: | MIL | 5 |
| Stalls/Quits | 6 | |
| Rolling | 9 | |
| Rough | 11 | |
| Misses | 12 | |
| Backfires | 13 | |
| ACCELERATION: | Stalls/Quits | 6 |
| Misses | 12 | |
| Bucks/Jerks | 14 | |
| Backfires | 13 | |
| Hesitation/Stumble | 15 | |
| Lack/Loss of Power | 16 | |
| Surge | 17 | |
| Spark Knock | 18 | |
| Cooling System Temperature | 19 | |
| Poor Fuel Economy | 20 | |
| Emissions Compliance | 21 | |
| CRUISE: | Stalls/Quits | 6 |
| Misses | 12 | |
| Bucks/Jerks | 14 | |
| Backfires | 13 | |
| Lack/Loss of Power | 16 | |
| Surge | 17 | |
| Spark Knock | 18 | |
| Cooling System Temperature | 19 | |
| Poor Fuel Economy | 20 | |
| Emissions Compliance | 21 | |
| TRANSAXLE OPERATION: (AUTOMATIC) | Engagement Concerns | 22 |