Quote:
Originally Posted by hupchye
Ya, I did some precaution before flashing DME ie: backup the ECU program and clone a spare ECU using Ktag.
After successfully flash and update the ecu software, problem still the same but came out 2x fault codes :
62D4 LDM: Engine management: interface
3179 Message (request, wheel torque, drivetrain, 0xBF) incorrect, receiver
DME, transmitter LDM
I am going to buy a 2nd unit LDM module to swap. Hopefully is a faulty LDM problem. Otherwise, I am totally lost..  |
Update ! Today fault codes 62D4 & 3179 problem have been resolved. It was due to PT Can Bus tapping problem. I think it is technically important for 4cyl BMW ACC retrofit ie:
4) PT Can Bus network require 120 ohm resistor end to end to form a 60 ohm network (Pic.1). The PT Can Bus termination resistor was in the module for older BMW model ie: EKPS & DSC. Unlike 6cyl BMW PT Can Bus layout (Pic.1), they have EKPS, Active Steering, Adaptive Headlight etc in the network. For ACC & LDM to tap out PT Can Bus from DSC may not have problem. But 4cyl BMW has lesser module in PT Can Bus network (Pic.3). Just tapping out from DSC may have PT Can Bus errors due to network end to end length. I modified to Pic.4 ie: cut thru PT Can Bus at DSC therefore DSC still the end node.
Unfortunately after fault codes cleared, my car ACC cruise control still cannot maintain speed.
