Skip to content
Home » Blog Posts » E28 Motronic ECU Diagram

E28 Motronic ECU Diagram

Pinout diagram for when you are in a pinch

We have all found ourselves in a situation where it is late-night elbows deep in your car and all you need to finish is a diagram of what pin belongs to a circuit you are working on. Don’t you fear that diagram is here, you will find a diagram and a chart showing you the ECU pin out for the Motronic system.

Motronic ECU

Motronic ECU pins
ECU pin diagram
Engine harnes to ECU connection
E28 Motronic ECU harness connection

COLOR ABRIVIATION DIAGRAM

ABBREVIATIONCOLOR
BKBLACK
BRBROWN
BUBLUE
GNGREEN
GYGREY
RDRED
VIVIOLET
WTWHITE
YLYELLOW
COLOR DIAGRAM
PIN 3RELATED CIRCUITCABLE COLOR
1Ignition timing controlBK
2Closed throttle inputBR/BU
3Wide open throttle inputBR/BK
4Start Engine inputBK/YL
5Ground/ShieldBR
6Common air flow meterGY/BU
7Air flow inputGY/YL
8Engine speed sensor inputYL
9Reference output for
airflow meter
GY/WT
10PIN 2 C238 /
PIN 24 TRANSMISSION
CONTROL
BR/GN
11Fuel rate outputWT
12PIN 5 DIAG CONNECTORWT/GN
13Engine temperature inputBR/RD
14Fuel injection control 1,2,3BR/WT
15Fuel injection control 4,5,6BR/YL
16GroundBR
17GroundBR
18(+) Continuous power inputRD
19GroundBR
20Fuel pump relay controlBR/GN
21Engine speed outputBK/BU
22Air inlet temperature inputGY/VI
23ShieldsN/A
24Oxygen sensor inputGN
25Reference point sensor inputYL
26Reference point sensor inputBK
27Engine speed sensorBK
28Transmission inputBR/BK
29A/C on inputBU/BK
30EmptyN/A
31Oxygen sensor heater controlGY/BR
32EmptyN/A
33Idle speed actuatorWT/YL
34Idel speed actuatorBK/GN
35(+) Ignition Power inputRD/BU
MOTRONIC ECU PINOUT

Leave a Reply

Your email address will not be published. Required fields are marked *