Diagnostic Overview

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW M5, 2009 BMW M6, 2009 BMW M5, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.

Each time the actuator is active, several checks are continually performed:

Diagnostic Status:

The actuator checks i.e. RAM, ROM, Actuator-Status or overheat by himself. If there is an error, he transmits it by CAN. The ECH is then generating the error codes "Diagnose status - System" (P158B, P159B" or "Diagnosestatus - Regler" (P158D, P159D).

Actuator-Mode:

The actuator changes his mode to "Failsafe" the error code "Return mode auf Failsafe" (P158A, P159A) is generated.

If the return-mode is different to the internal mode, a timer is started. Otherwise the timer is cleared. If the timer exceeds a maximum time, a fault code " berwachung Modevorgabe" (P152F, P153F) is generated.

Position:

If the actuator sends the fault-indication instead of the target position, the fault code "Istwert fehlerhaft" (P152D, P153D) is generated.

If the measured position is retarded in relation to the target position, exceeding a certain threshold, a timer is started. Otherwise the timer is cleared. If the timer exceeds a maximum time, a fault code "Soll/Istvergleich" (P152E, P153E) is generated.

Target-Position:

If the return-target-position is retarded in relation to the target position, exceeding a certain threshold, a timer is started. Otherwise the timer is cleared. If the timer exceeds a maximum time, a fault code "Sollvergleich" (P152C, P153C) is generated.