5.23.1 Description
A CAN bus architecture is employed on the Freelander vehicle between the engine, transmission, brake and instrument pack control modules. A fault is detected if the battery voltage is greater or equal to 10 V for at least 0.750 s and no CAN messages have been received from the TCM or the instrument pack.
CAN System
| Component/System | Fault Codes | Monitoring Strategy Description | Malfunction Criteria | Threshold value | Secondary Parameter | Enable Conditions | Time Required | MIL Illumination | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| CAN Bus | P1646 | CAN bus activity | No messages received from the TCM | Battery positive | "GREATER THAN EQUAL TO" 10V for at least 0.750 s | 0.200 s / continuous | two driving cycles | ||||
| P1647 | No messages received from the Instrument Pack | 4 to 20 s/ continuous | No MIL Illumination | ||||||||
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.