Replacing Control Unit Function Monitoring
Voltage drop
- Irreparable damage to control unit
- Damage to control unit
- Fault entries in the control unit
- Control unit programming/coding is aborted
- Malfunctions in the control unit, even during programming/coding
→ Switch off ignition before disconnecting the control unit.
→ Make sure that the power supply is not interrupted during programming/coding.
→ Connect the battery charger with at least > current 90 A to the vehicle battery.
Information
The instructions in the Tester take precedence, since the description may be different with later Tester releases.
The procedure described here has been structured in general terms. Different text or additional information may appear in the Tester.
Information
The terms "Ignition on" and "Starting engine" are re-defined for fully electric vehicles (battery electric vehicles - BEV).
Establishing operational readiness/Ignition on:
Prerequisites for establishing operational readiness: High-voltage battery is sufficiently charged, remove vehicle charging cable from the vehicle charge port, put driver's key in the emergency start tray.
Establishing operational readiness automatically: Get into the vehicle and close the driver's door. The driver's key is recognized inside the vehicle. Operational readiness is established.
Establishing operational readiness manually: Press Start/Stop switch. The driver's key is recognized inside the vehicle. Operational readiness is established.
Establishing operational readiness/Starting engine:
Establish operational readiness and engage transmission range. The vehicle is now ready to drive and can be moved.
Ending operational readiness/Switching off ignition
Ending operational readiness automatically: Get out of the vehicle with the driver's key and close the driver door. The driver's key is no longer detected outside the vehicle. Operational readiness ends.
Ending operational readiness manually: Press Start/Stop switch until the instrument cluster is switched off.
Ending driving readiness/Stopping engine
Vehicle is stationary: Press the P button on the instrument cluster. The vehicle is parked.
- Connect the Tester to the vehicle and start it. Establish operational readiness.
- Place original remote control in emergency start tray.
Emergency start tray
- Select the function monitoring control unit in the Overview. Press F12 to continue. Should a fault analysis protocol (FAP) be created? Press F11 to continue.
- Select Coding/programming.
- Select Automatic coding.
- 5.1 The tester displays the message: Coding successfully performed.
- Go back to the Overview.
- in the Overview, press F7 to switch to the Additional menu.
- Read out all fault memories, process and delete existing faults if necessary.
- Exit the diagnostic application. End operational readiness on the vehicle. Disconnect the Tester from the vehicle.
Only vehicles up to MY 2022 :
- Store new part numbers and serial numbers in the PCSS.