Rover MEMS Mpi ECU Pin Out
(Not Fully Complete or Checked)



 
Pin No.
Function
 Colour Code
From Fuel Injector No. 4  
From Stepper Motor Ph. 2  
From Stepper Motor Ph. 1  
From Main Relay Coil (Relay Terminal 85)  
 Lambda Sensor Heater Relay  Coil ???  Black-Green
   
From Lambda Sensor  
Throttle Position Sensor (TPS) Signal   
Throttle Position Sensor (TPS)  +ve  supply  
10  Serial Diagnostic Output White-Yellow
11  Fused Power supply from Ignition Switch White-Pink
12     
13  Throttle Pedal switch (if fitted ?)   
14  Earth Ground  to battery -ve terminal (on automatic transmision models via park/neutral switch  ?) 
Ground connection  for Screened Leads on CAS & Lambda sensors (may also ground MFU ?)
Black 
15  Serial Diagnostic Input Black-Green
16  Air Temp Sensor Signal  
17   Knock Sensor (KS)   -- not fitted to all Rover models  
18  From Lambda Sensor  (Earth Return ?)  
19  From Air Conditioning  
20  From Fuel Pump Relay Coil (relay terminal 85)  
21   CFSV Purge Valve  
22  From Stepper Motor Ph. 3  
23  From Fuel Injector No. 2  
24  From Fuel Injector No. 1 Yellow-Brown
25  From Coil and Tachometer  ( ie: "contact breaker") White-Black 
26  From fuel injector No. 4  
27  From Stepper Motor Ph. 4 Orange-Blue
28  +12 volts Power from Main Relay (relay terminal 87)  
29  Main Ground Black 
30  Ground to Sensors (CTS, ATS, TPS, FRTS) ??? Pink-Black 
31  Crank Angle Sensor (CAS) (AC Signal) Blue-Purple
32 Crank Angle Sensor (CAS)  (AC Signal) White-Blue
33  Coolant Temp Sensor Signal   Pink-Green
34   Fuel Rail Temperature Sensor (FRTS)   
35  From Air Conditioning  
36  From Oxygen Sensor Heater Relay Coil (relay terminal 85)  
     

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