Connector Pinouts, Wiring Diagrams & Installation Instructions – Rover MEMS 2J

Connector Pinouts

The connectors below are drawn viewed from the wiring side, i.e. looking at the connector housings when installed on the ECU. The pins used by the various map switches are highlighted. Use the diagram below to find possible map switch inputs which are available (not connected) on your ECU.

Wiring Diagrams & Installation Instructions

The diagrams and notes below show you how to wire up a map switch using the selected input pin.

Switch to Ground Pins A34, A11, A10, A16, A14 and B5 are used with an ON/OFF switch to earth. A cable may be routed from the ECU pin to somewhere convenient, maybe behind the dash. Any type of latching (non-momentary) ON/OFF switch and any convenient earth point near to the switch may be used.

OBDII KWP2000 The OBDII map switch uses specific KWP2000 messages sent over the OBDII K-Line to switch maps. Most vehicles will already have an OBDII socket correctly wired.