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.
New command code system: Notes
The new EPROM that has been developed for the ISAT enables a completely new command code system to be used when carrying out fault diagnosis on model year 1994 cars.
Up to now, a three-digit code has been used to obtain readings or activate signals and functions. Starting with M94 cars, this has been superseded by a system of menus in clear text which make it easy to select the desired "command" directly on the keypad.
The structure of the MOTRONIC system's command menus will be evident from the schematic arrangement on the next page.
We then see that there are eight main menus, five of them with a sub-menu containing different numbers of commands or functions.
These are:
- READ FUNCTIONS (see READ FUNCTIONS )
- ACTIVATE (see ACTIVATE )
- READ ON/OFF (see READ ON/OFF )
- INITIATE (see INITIATE )
- READ SYSTEM INFO (see READ SYSTEM INFO )
NO RELATED
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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.