DSRC - internal communication
Check for low voltage level, if normal voltage level replace the unit.
What you'll see
External communication over DSRC is not updated with Tachograph data.
System reaction
No system-reaction text recorded.
Diagnostic depth
Test execution:The test of the SPI communication shall be done periodically during the entire time SPI is active. Since the communication is periodic by design, logging of communication could be done. The log could be analysed for communication errors.Information:If the log indicates faulty communication the fault shall be set active.Validation:The fault shall be set as 'test failed' when the fault has been active for 5 tests. 2 operation cycles to confirmed.Invalidation:The fault shall be set as deactivated when the test has passed for 5 executions.
Faulty communication link between MCU and DSRC chip or malfunctioning DSRC chip.