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View Full Version : Please help to repair Checksum SH7055



etpvn
26th September, 2015, 04:45 AM
Hello M8s
I have ECM of Ford Escape 2004, Engine 2.3l - L3-VE. The Problem now is that When start Car only once Ignition and Injection Pulse (Electornic signal to control Injectors and Sparks) go out from the PCM Pins for Engine, then totally Stop, Cannot Start The Car.
When I used ForD VCM2 to read DTC code, there were no fault code in PCM. Check electronic signal for Ignition and Injection by Oscilloscope I have seen only ONCE (1 time - not Period) of Signal to Injectors and Ignitors, then got no signal more.
So that, I guessed that the Checksum of PCM has a problem, because I have also replace many Electronic Parts (ICs) but got same result.

Can you Please help me to repair Checksum or recover Dump of MCU - SH7055?
The PCM is L3D5 18881E, similar to Mazda Tribute.
332885332886

332887

Thank you very much!