Vehicle:Mini Cooper 2003

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Connector 121 pinout.jpg

Minimalistic wiring

3 BLK/RED Output: Ignition coil 2-3  ?
4 BLK/BLU Output: Ignition coil 1-4  ?
10  ? Electronic Throttle Body position signal #1 white
11  ? Electronic Throttle Body position signal #2 red
12  ? Electronic Throttle Body TPS ground green
13  ? Electronic Throttle Body TPS power orange
19 BRN/VIO Output: Injector #4 orange
20 BRN/GRN Output: Injector #2 blue
21 BRN/YEL Output: Injector #1 red
22 BRN/GRY Output: Injector #3 green
53 BLK/VIO Input: Camshaft position sensor (2) green
55 BLK/GRY Input: Crankshaft position sensor (2) orange
65 GRY/WHT ETB  ?
66 GRY/WHT ETB C
72 BRN/VIO Input: Camshaft position sensor (3) Ground  ?
74 BRN/GRY Input: Crankshaft position sensor (1) Ground  ?
80 BRN Ground black
81 BRN Ground black


Connector 121 pinout.jpg

82/1 YEL Acceleration Pedal +5v black
83/2 GRY/WHT Acceleration Pedal +5v orange
85/4 B Clutch switch black
86/5 BRN/GRN Acceleration Pedal white
87/6 BRN Acceleration Pedal Ground blue
97/16 BRN/RED Pwr? red
105/24 B Fuel Pump blue
106/25 BLK/VIO Anti-theft system green
107/26 GRY/YEL Acceleration Pedal signal green
108/27 WHT Acceleration Pedal white
114/33 BRN ECU Ground clear
115/34 BRN ECU Ground clear
118/37 B Fuel Pump relay clear
120/39 GRN/RED +12V clear
121/40 RED/WHT Power +12V all times clear
A B C
A B C

Connector 121 pinout.jpg

2003 Mini Cooper ECU Wiring Diagram

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2003 cooper 2.png

2003 cooper 3.png

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2003 cooper instrument cluster 1.png

2003 cooper instrument cluster 2.png

File:2003 cooper tach wiring.pdf

  1. 1 BRN/BLK ground
  2. 2 YEL/BRN CAN low
  3. 3 YEL/BLK CAN high
  4. 7 BLU +12v power

See also See also http://rusefi.com/wiki/index.php?title=Manual:Hardware:CAN_sniffer

ECU header: 121p, compatible with IV Volkswagen Jetta VR6, part number http://www.te.com/catalog/pn/en/966971-2

Trigger shape

qu2hLJ2.png