Sensor data error - data or communication error
1) Check cable harness. 2) Check for evidence of tampering. 3) Pair another motion sensor with the tachograph and check if it is working. 4) If the other motion sensor is working, replace the faulty motion sensor and perform a calibration of the tachograph system.
What you'll see
tbd
System reaction
* Event/Fault data 0x09 or/and 0x35 are stored in tachograph. * Warning displayed in the tachograph display. * System event in TCO1 CAN message is set to active. * Tachograph warning displayed in the instrument cluster.
Diagnostic depth
Motion sensor data incorrect: * Tachograph receives speed counter value from motion sensor that differs more than 10 pulses from value calculated by the tachograph. * Motion sensor communication error. Content of ACK or response is not correct.
* Fault in cable harness. * Fault in motion sensor.