Support for MEMS3 engine ECU

Tested on Rover 25, 45, MG ZR, Rover 75, MGTF, LE500, Freelander 1.

Features available:

• Read ECU identifier and VIN number
• Read error codes
• Erase error codes
• Live diagnostic data
• Learn 5AS or Pektron EMS code (not 75/ZT, not Freelander 1 with EWS3D or SAWDOC immo)
• Read 5AS or Pektron input status
• Map tuning with SAWS Tuning maps (upto 2005, not supported on Nanjing built cars)

Screenshots of pscan.uk tool running on Windows:

Reading error codes

Reading live diagnostic data

Reading immobiliser status

Map tuning with SAWS Tuning files

It appears to be normal for the MEMS3 to report the P1520 error code even when the engine is running well.

This ECU may also report strange results in live data for sensors that are not fitted.

This ECU supports two modes, ISO mode and BMW mode. The BMW mode appears to be more reliable and therefore we recommend that customers use this one. Map tuning is only possible in BMW mode..

On our own Rover 25 the ECU is reluctant to connect if the engine is running. It may be necessary to switch the ignition on with the engine not running, connect pscan to the ECU, and then start the engine.

© pscan.uk Limited 2018       image and code credits