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.
Synchronization Of New Modules
When new satellite modules are fitted, these modules have no system time. Transmission of the two system time telegrams allows the module to adopt the system time. This is only possible when the stored system time in the satellite modules is smaller that the time sent.
If the system time in a module is greater than the time sent, (trying a part from another vehicle), the system time is not adopted and an entry is made in the fault memory.
When the SIM or any satellite is replaced, the system time must be entered. As the system time is available in all ISIS modules, it can be transferred into the new module.
This takes place via the Diagnosis Program (Service Functions). To do so, the DISplus/MoDiC requests the system time from all satellites and selects the largest.
The DISplus/MoDiC adds an amount to this time and transmits the result into the new module as the system time. The correction amount compensates for the run time between reading from the satellites and entry in the new module.
This prevents fault messages from the satellites because the system time transferred by the new module is smaller than that stored in the satellites.
Use the Manual With the Right Hardware
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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.
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