No ECM Communication, No Crank, No Gear Change
Thread Starter
Newbie
Joined: Apr 2023
Posts: 1
Likes: 0
AMG GT
No ECM Communication, No Crank, No Gear Change
2017 AMG GT:
Autel shows no communication with the ECM. All other computers communicate
No cranking or attempt to. Will not shift from Park. Everything works inside.
New battery, new main fuse, all voltage good everywhere on the car, except to the ECM. All wires heading into the ECM show 7V. Grounded the death out of the ECU, fuse box and everything in between and no changes. No obvious blown fuses in either fuse box.
Any suggestions on what would cause a 5V drop and/or cause the symptoms?
Autel shows no communication with the ECM. All other computers communicate
No cranking or attempt to. Will not shift from Park. Everything works inside.
New battery, new main fuse, all voltage good everywhere on the car, except to the ECM. All wires heading into the ECM show 7V. Grounded the death out of the ECU, fuse box and everything in between and no changes. No obvious blown fuses in either fuse box.
Any suggestions on what would cause a 5V drop and/or cause the symptoms?
