BOSCH Motronic ME7.3.1 pinout diagram - Alfa Romeo Forum
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BOSCH Motronic ME7.3.1 pinout diagram

Hello!
I would like to ask if there is anyone having the detailed pinout diagram of the Bosch Motronic ME7.3.1 ECU.
I searched into the DTE CD-ROM but there are not any details as to the function of each pin of the ECU connectors.
Thanks in advance!
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(Post Link) post #2 of 22 Old 25-06-07 Thread Starter
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Re: BOSCH Motronic ME7.3.1 pinout diagram

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Re: BOSCH Motronic ME7.3.1 pinout diagram

bump #2....
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Well, I had been hoping someone would reply, so that I could broaden my horizons somewhat.: On second thoughts, I doubt if I would of comprehended the reply to any degree anyway!: I am just about able to plug a code reader in, and a 'crappy' Diag. scanner into the EOBD socket, just to enable me to view the pretty pictures. Any further information forthcoming?:
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Re: BOSCH Motronic ME7.3.1 pinout diagram

K = 7
12V = 6
L = 15
ground = 4
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Quote:
Originally Posted by rarebear View Post
K = 7
12V = 6
L = 15
ground = 4
Do you have the whole pinout diagram?
Something like that:

http://i2.photobucket.com/albums/y5/...cu_diagram.jpg
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Thanks for that Rarebear.
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Re: BOSCH Motronic ME7.3.1 pinout diagram

bump #3 and counting....
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Hi ,

Here I can provide the ME7.3.1 ECU pin out for you,

But Can you also help me to find Bosch M2.1 ECU pin out.
Attached Images
File Type: jpg pin out Bosch ME 7.3.1.JPG (40.3 KB, 493 views)
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Re: BOSCH Motronic ME7.3.1 pinout diagram

in the pinout photo of ME7.3.1 writes, Boot Mode Pin 10 -- 0 Volts

I will connect the pin 10 of Tool A on the black wire (negative battery pole) or direct to the ground?
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Re: BOSCH Motronic ME7.3.1 pinout diagram

eLearn comes to the rescue ...

Last edited by 156Chris; 10-12-08 at 10:47.
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Re: BOSCH Motronic ME7.3.1 pinout diagram

156chris !!! excellent ... !
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Re: BOSCH Motronic ME7.3.1 pinout diagram

can anyone answer my question?
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Quote:
Originally Posted by hammersword View Post
can anyone answer my question?
unless I'm mistaken the negative pole on the battery is the earth in the car (basically there is a potential difference of 12v (14.4v) between the negative and positive poles of the battery) ... but the bigger question is why do you need to know? what are you doing with it?
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Not sure if the above is correct ... but here is another list I found in eLearn (the ME7.3.1 is for the 156 GTA, M1.5.5 is for the 1.6 TS is that the one you really wanted?)

Quote:
Originally Posted by eLearn
F1 - Not connected
F2 - Fuel vapour recovery solenoid control
F3 - Alfa Romeo CODE connection
F4 - Not connected
F5 - Not connected
F6 - Compressor engagement request
F7 - Supply for accelerator pedal potentiometer
F8 - Signal for potentiometer - 1 accelerator pedal
F9 - Quadrinary - Fan 1st speed request
F10 - Cruise Control ON/OFF
F11 - Not connected
F12 - CAN-L line
F13 - Compressor relay control
F14 - Not connected
F15 - Direct power supply
F16 - Ignition-operated power supply, via main relay
F17 - Not connected
F18 - Cruise Control warning light
F19 - Engine coolant overheating warning light
F20 - Preparation for Flash Programming
F21 - Not connected
F22 - Fuel level sensor
F23 - Not connected
F24 - Earth for potentiometer - 1 accelerator pedal
F25 - Earth for potentiometer - 2 accelerator pedal
F26 - Brake lights switch
F27 - Brake lights
F28 - Not connected
F29 - CAN -H line
F30 - Fuel pump relay control
F31 - Main relay activation
F32 - Ignition-operated power supply, via main relay
F33 - Not connected
F34 - Engine coolant warning light
F35 - Rev counter signal
F36 - Not connected
F37 - Not connected
F38 - Not connected
F39 - Not connected
F40 - Signal for potentiometer - 2 accelerator pedal
F41 - Quadrinary - fan 2nd speed request
F42 - Cruise Control Resume
F43 - Cruise Control SET +
F44 - Not connected
F45 - Not connected
F46 - Injection warning light
A47 - +15 ignition-operated power supply
A48 - Supply controlled by ignition, via main relay
F49 - Not connected
F50 - Fan 1st speed control
F51 - Not connected
A52 - Fuel consumption signal
F53 - Diagnostic connection (K line)
F54 - Air temperature sensor signal
F55 - Not connected
F56 - Supply for accelerator pedal potentiometer
F57- Air flow meter signal
F58 - Cruise Control SET -
F59 - Switch on clutch pedal
F60 - Not connected
F61 - Not connected
F62 - Fan 2nd speed control
F63 - Air flow meter supply
F64 - Not connected

M1 - - Throttle body motor earth
M1 - Lambda sensor heater (pre-cat. 2)
M3 - Operation of injector for cyl. 2
M4 - Not connected
M5 - Not connected
M6 - Knock sensor reference earth 2
M7 - Lambda sensor reference earth 2)
M8 - Not connected
M9 - Not connected
M10 - Engine RPM sensor
M11 - Not connected
M12 - Lambda sensor reference earth (post-cat 2)
M13 - Not connected
M14 - Cylinder 3 coil operation
M15 - Cylinder 2 coil operation
M16 - Cylinder 1 coil operation
M17 - Throttle body motor supply
M18 - Lambda sensor heater (post-cat. 2)
M19 - Operation of injector for cyl. 1
M20 - Operation of injector for cyl. 3
M21 - Not connected
M22 - Knock sensor 1
M23 - Lambda sensor signal (pre-cat. 1)
M24 - Potentiometer - 1 throttle body
M25 - Engine coolant temperature
M26 - Sensors reference earth
M27 - Not connected
M28 - Lambda sensor signal (post-cat. 1)
M29 - Not connected
M30 - Cylinder 6 coil operation
M31 - Cylinder 5 coil operation
M32 - Cylinder 4 coil operation
M33 - Throttle body motor earth
M34 - Lambda sensor heater (pre-cat 1)
M35 - Operation of injector for cyl. 4
M36 - Operation of injector for cyl. 6
M37 - Not connected
M38 - Knock sensor 2
M39 - Lambda sensor signal (pre-cat. 2)
M40 - Throttle body potentiometer 2
M41 - Not connected
M42 - Timing sensor signal
M43 - Not connected
M44 - Lambda sensor signal (post-cat. 2)
M45 - Not connected
M46 - Not connected
M47 - Not connected
M48 - Not connected
M49 - Throttle body motor supply
M50 - Lambda sensor heater (post-cat. 1)
M51 - Not connected
M52 - Operation of injector for cyl. 5
M53 - Not connected
M54 - Knock sensor 1 reference earth
M55 - Lambda sensor reference earth 1)
M56 - Not connected
M57 - Not connected
M58 - Throttle body potentiometer supply
M59 - Engine rpm sensor
M60 - Lambda sensor reference earth (post-cat. 1)
M61 - Not connected
M62 - Not connected
M63 - Not connected
M64 - Not connected

Last edited by 156Chris; 10-12-08 at 10:47.
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Re: BOSCH Motronic ME7.3.1 pinout diagram

I am ECU programmer and I read the ECU's via OBDII but some ecu in order to be read they need boot mode... So, I found in your site elements for the ME7.3.1 - ME7.3.H4 ECU.
in some sites I 've found that the boot mode is Pin 20 of Tool A, and in your last post the "F20 - Preparation for Flash Programming" is the boot mode, but the picture that has been posted by Manson166 gives the boot mode from Pin 10 "F10 - Cruise Control ON/OFF". So I think is wrong!
also this picture is from Byteshooter flash programmer and it is wrong. Why? Download Byteshooter - V2.72.zip
Downloads: Byteshooter
it has all the pinouts from all the ECU's! In ME7.3 gives pin 20 boot mode.
Download
unzip
open .exe
change language "einstellungen/sprache/english
pick alfa romeo 156 ME7.3.1
go to "?" on tool bar and pick "pin outs"

So......
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Re: BOSCH Motronic ME7.3.1 pinout diagram

I need a diagram for ECU.
I ve got 156 2.5 V6 1999year.

Can anyone help?
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Re: BOSCH Motronic ME7.3.1 pinout diagram

what diagram do you need, and for what purpose?
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Quote:
Originally Posted by hammersword View Post
what diagram do you need, and for what purpose?
Ive got error P0340 (Timing sensor above maximum limit).
The sensor was examined and it's giving 5 volt impulses.
Mechanic thinks that sensor may be OK and to proove that, he needs to check ECU.
May be the ECU is damaged.

SO I NEED A DIAGRAM FOR ECU to find in it the contacts to which timing sensor is sending those 5 volts.
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Re: BOSCH Motronic ME7.3.1 pinout diagram

Have a look above and you will find the complete diagram...
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Quote:
Originally Posted by hammersword View Post
Have a look above and you will find the complete diagram...
I have attempted to go to the link you provided above but it no longer exists... please help
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Its a very old thread !!!!
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