Trouble Symptom Usage
- Check for possible cause by trouble symptom and then perform specified inspection procedure. See TROUBLE SYMPTOM INSPECTION table.
- When performing specified trouble symptom inspection procedures, technician may be instructed to perform scan tool service data inspection on a specified component. Scan tool is used to monitor operation of a specified component under a specified operating condition. Component operation is then compared to a normal operating range to determine if component is operating properly. Scan tool service data inspection procedure is listed after TROUBLE SYMPTOMS.
- Technician may be instructed to perform a specified DTC test. DTC TESTS are listed under SELF-DIAGNOSTIC TESTS, before TROUBLE SYMPTOMS.
- Technician may be instructed to perform a scan tool actuator test on a specified components. Scan tool actuator test procedures are listed after SCAN TOOL SERVICE DATA INSPECTION PROCEDURE.
TROUBLE SYMPTOM INSPECTION
| Trouble Symptom | Inspection Procedure No. |
|---|---|
| No Scan Tool Communication With Any System | 1 |
| No Scan Tool Communication With ECM | 2 |
| MIL Fails To Illuminate When Ignition Is First Turned On | 3 |
| MIL Remains Illuminated At All Times | 4 |
| Engine Cranks But Will Not Start | 5 |
| Engine Starts & Dies | 6 |
| Engine Is Hard Starting | 7 |
| Unstable Engine Idle Speed | 8 |
| Engine Idle Speed Is Too High | 9 |
| Engine Idle Speed Is Too Low | 10 |
| Engine Stalls At Idle When Engine Is Cold | 11 |
| Engine Stalls At Idle When Engine Is Warm | 12 |
| Engine Stalls When Accelerating | 13 |
| Engine Stalls When Decelerating | 14 |
| Engine Hesitates Or Stumbles | 15 |
| Engine Vibrates When Accelerating | 16 |
| Engine Vibrates When Decelerating | 17 |
| Engine Has Poor Acceleration | 18 |
| Engine Surges | 19 |
| Engine Knocks | 20 |
| Engine Diesels | 21 |
| Engine Has High CO & HC When Idling | 22 |
| Low Generator Output Voltage Of Approximately 12.3 Volts | 23 |
| Exhaust Emission Test Failed | 24 |
| EVAP Purge Flow Test Failed | 25 |
| EVAP System Pressure Test Failed | 26 |