Retrieving Diagnostic Trouble Codes
- Attempt to start engine. If necessary, crank engine for up to 10 seconds. Read and record Diagnostic Trouble Codes (DTC). If scan tool screen is blank or displays NO RESPONSE, go to SCAN TOOL PROBLEMS & ERROR MESSAGES .
- If DTCs are displayed, see DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. Only DTCs relating to charging system are listed. For all other DTCs, see SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no DTCs are displayed, go to CHARGING SYSTEM NO CODE TEST under SYSTEM TESTS.
DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Scan Tool Display |
|---|---|
| P0622 | GENERATOR FIELD NOT SWITCHING PROPERLY |
| P1492 | BATTERY TEMPERATURE SENSOR VOLTAGE TOO HIGH |
| P1493 | BATTERY TEMPERATURE SENSOR VOLTAGE TOO LOW |
| P1594 | CHARGING SYSTEM VOLTAGE TOO HIGH |
| P1682 | CHARGING SYSTEM VOLTAGE TOO LOW |