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Diagnostic Overview

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The Communication between EDR1, EDR2 and the ECH is monitored all the time. These checks are implemented: Timeout (U0141, U0151), Alive (U0142, U0152), Checksum and ECU-intern fault (U0143, U0153).

If it is not possible to start a communication between at least one of the EDR after 10 times, the fault codes P153B is set.

If there is an electronic-problem (short between can-high and can-low) the CAN-controller detects a Bus-Off by himself (UC140).

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