Replacing Battery On Control Unit For External Communication
NOTE:
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
→ 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 PIWIS Tester instructions 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 additions may appear in the PIWIS Tester .
- Connect the Tester to the vehicle and start it. Switch on ignition.
- Place original remote control (hand-held transmitter) in emergency start tray.
Emergency start tray
- Select the vehicle type if required.
- Select the Connect control unit in the overview . Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
- Drive links/checks must be selected.
- Select Backup battery, reset state of health (SoH)
.
- 6.1 Procedure is performed according to menu guidance.
- Go back to the overview .
- In the overview , press F7 to switch to the Additional menu .
- Read out all fault memories , work through faults that are stored if necessary and clear the fault memories.
- Exit the diagnostic application. End operational readiness on the vehicle. Disconnect the Tester from the vehicle.