5.15.1 Description
The ECM performs a number of self-test integrity diagnostics on its internal hardware and software to check for faults. An error is detected if the ECM receives no CAN messages for at least 0.1 seconds or the calculated checksum at power up/down is incorrect.
Engine Control Module Self Test
| Component/System | Fault Codes | Monitoring Strategy Description | Malfunction Criteria | Threshold value | Secondary Parameter | Enable Conditions | Time Required | MIL Illumination |
|---|---|---|---|---|---|---|---|---|
| ECM | P0600 | Bus check | No CAN messages received from the TCM | > 0.100s | Battery positive | > 10V | Immediately/ continuous |
two driving cycles |
| P0606 | Self check (watchdog) | RAM and ROM check | Invalid checksum | At power up/down |
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.