5.25.1 Description
This diagnostic is used as part of the EVAP detection system. The EVAP system diagnostic defaults to enabled if an engine off timer error is detected. The diagnostic consists of a rationality check of the engine off time against engine cool down. The diagnostic runs if the ECT at engine off minus the ECT at engine start is grater than or equal to 39.8°C.
Engine Off Timer
| Component/System | Fault Codes | Monitoring Strategy Description | Malfunction Criteria | Threshold value | Secondary Parameter | Enable Conditions | Time Required | MIL Illumination |
|---|---|---|---|---|---|---|---|---|
| Engine Off Timer | P2610 | Rationality check against engine cool down | Engine stop time | "LESS THAN EQUAL TO" 3600 s | ECT at engine off - ECT at engine start |
"GREATER THAN EQUAL TO" 39.8°C | immediately / continuous | No MIL illumination (leak (check defaults to enabled) |
If the above table does not include details of the following enabling conditions: - IAT, ECT, vehicle speed range, and time after engine start-up then the state of these parameters has no influence upon the execution of the monitor.