I'm working on a 2005 DB9 with a missing left ECM communication.
Key is not recognized either.

Anyone with a diagram or previous experience in a similar scenario?

Thanks!!

 

I have restored communication with BOTH ECM's... but still have a issue.

ERROR KEY and the temp gauge goes ALL THE WAY UP..

Any ideas??

Error codes are as follows:
BANK 1

B1600 No key code received
P0705 Transmission range sensor circuit malfunction
P1000 System Check not completed (its nothing..)
P1797 CAN transmission control modul to engine control module malfunction. (This one worries me..)

 

This looks like I'm talking to myself..

I have done some more test on this car.
I disconnected the transmission plug to check CAN lines. I find out that there is NOTHING on pin #2 (CAN L) and pin #6 (CAN H)
No voltage as expected (2.4 + V) or ohms reading..

Checked also pin #13 / 16 for ground Its OK

Checked pin #14 for POSITIVE (perm) its OK

So, my question is..... who's the module before TCM ? I want to check the transceiver output on that module.

Any one with this info?? thanks!

 

Engine control module is where it comes from. What is the story beforehand? Crash car? Or just some rodent damage from storage?

 

I don't know exactly the past story... Car was shipped to California from Florida with NO START condition.

I'll check the CAN at the ECM to see what's the readings. I disconnected LEFT (B) ECM, so I'm going to also ceck continuity from ECM to TCM pins.

Any sugestion?? Thanks

 

What did you find ?

 

Long time of radio silence, guessing it's not running and there's a story we shall never know.

 

This is my biggest worry with these cars. As things like ECUs start to fail, in order to pass emissions regulations we would need the same ECU. We couldn't just wire in a Motec or Haltech unit and drive the car legally in many places even if tail pipe emissions still passed.