Mercedes SDConnect C4 Modified relay board pcb. Shutdown mode.
Modified SD Connect C4 relay board. shutdown function. Relay Board SD Connect.
The revision includes:
- replacement of the sleep mode with the full shutdown mode (excludes battery discharge);
- replacement of electrolytic capacitors with ceramic ones;
- replacement of analog multiplexers with ADG426;
- replacement of the battery charge controller with the original;
- calibration of vehicle on-board voltage measurement (false low voltage error);
- elimination of errors on batteries;
In addition, replacing the relay board eliminates the following multiplexer malfunctions:
- not detecting individual vehicle blocks
- self-test error of the multiplexer – UART Test 8
- internal battery charging error (selftest – PMPic 8)
- lack of any reaction when power is applied
The procedure for replacing the board is simple and does not require any special equipment and skills in repairing microprocessor devices.
