Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Bus Master Functions
The SIM has two tasks to perform as Bus Master for the byteflight.
- Generation of the synchronization pulses (Sync. Pulse)
- Setting the satellites in alarm mode (Alarm Pulse)
In the ASE, the SIM is configured as byteflight master (bus master). In principle, any satellite can be configured by software as bus master. However, there may only be one bus master in the system.
All other satellites (bus slaves) use the sync pulse for internal synchronization. Each slave can transmit telegrams between the sync. pulses on the byteflight .
The SIM provides the synchronization pulses at intervals of 250 mues. The alarm mode is transmitted across the width of the sync. pulse. The duration of a sync. pulse in alarm status is approx. 2 mues. Normally, the synchronization pulse lasts approx. 3 mues.
The duration of a complete telegram can vary between 4.6 to 16 mues.
On the basis of all the available information provided by the sensors, the bus master (SIM) must decide whether the satellites are to be set in the alarm mode.
When the alarm mode is set by the SIM, all the trigger circuits (B+) of the ASE are placed on trigger standby.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.