Bosch VP44 PSG Control Unit Diagnostics

Bosch PSG Diagnostics

FCOM supports diagnostics of TDDI engine fuel pumps from Robert Bosch GmbH. These control units do not have diagnostic lead connected to any pin into the OBD2 socket, it is necessary to connect diagnostics directly to a pin of the control unit. (Ford IDS does not allow diagnosis of this control unit).

Please note that only VP44 fuel pumps installed between 1998-2006 are supported. Other systems (e.g. Denso, Lucas) use different control units and this page does not apply to them!

Connector

For diagnostics of pump is necessary the direct connection from PIN9(Kline) in the ECU to PIN7 in FCOM diagnostic interface.

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Pump control unit description

The control unit of pump contains only a hybrid circuit board, which is not repairable in normal work conditions. Consumption of the ECU can be up to 8A, it is necessary to get connected to a fused wiring.

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Diagnostics

Diagnostics of pump is available from the main menu of FCOM by clicking on “Special Diagnostics” and then selecting “Fuel Injection Pump Diagnostics”.

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This function cannot be used to "virginize" PSG VP44 fuel pump ECU. On the other hand, FCOM has ability to program used fuel pumps.