BMW E38 Enhanced IKE

Enhanced IKE - DME/EGS data stream displayed in the instrument cluster

Supports

DME : Bosch Motronic v7.2 (M62TU) 

EGS : Automatic Transmission ZF5HP24 v8.60.2 (E38/E39/E53)

Functions

@ Display the following information

1.Coolant temperature.

2.Coolant outlet temperature.

3.Transmission temperature.

4.Intake air temperature.

5.Intake air mass flow.

6.Battery voltage.

7.Engine RPM.

8.Engine load.

9.Fuel trim additive.

10.Fuel trum multiplicative.

@ Display switch by steering wheel buttons NEXT / PREV or RT_TELEPHONE.

@ Data request interval 2 secs.

@ Automatic external scanner collision detection.

Principle

Basiclly, the project is a small OBDII scanner that requesting information from DME and EGS.

It reads data from D-Bus then write display string to I-Bus. There are 4 wires needed to connect to wire harness of IKE (12V / GND / D-BUS / I-BUS)

Hardware/Software

Base on STM32F103C8T6 (20k RAM / 64k FLASH)

Enhanced IKE released as free, open source hardware/software, licensed under the GNU General Public License (GPL)

https://github.com/gigijoe/E-IKE

All bugs are made by my self @@

Installation

Before doing anything, make sure the ACC key off and know what you are doing...

There are 4 pins need to branch out - D-Bus / I-Bus / 12V / GND

Find connector X10113 on the back of Instrument Cluster. Mark the following wires.

D-Bus : Pin 1 (White / Purple)

 GND : Pin 9 / 10 (Brown / Green)

I-Bus : Pin 8 (White / Gray / Yellow)

12V : Pin 12 (Purple / Green)

Soldering 4 wires of MPX connector to the X10113 wire harness

PIN          X10113                                      MPX 

D-Bus      Pin 1 (White / Purple)                D-Bus (Brown)

I-Bus       Pin 8 (White / Gray / Yellow)     I-Bus (White)

12V         Pin 12 (Purple / Green)               12V (Red)

GND       Pin 9 / 10 (Brown / Green)         GND (Black)

The E-IKE box is located in the space below to instrument cluster as shown. Then plug in the MPX connector.

Modification of under hood 20 pins connector cap. The cap is needed in order to make connection between TXD and TXDII of D-Bus

Remove the PCB from the cap.
Wired two pins and cut two wires as below then put it back to the cap.

Operation

ACC Key on, press steering wheel button NEXT / PREV / RT_TELEPHONE to switch between items.