2004 Honda CRV
Hi all, I was called to do the immobilizer keys on this used ECM. I did not diagnose the vehicle, I was contracted to make it start, which I did.
Only one key available no biggee
Did the immobilizer, vehicle starts and runs well.
The customer took the vehicle for 2 days
then had it towed back as a no start.
I did not diagnose it originally but verified it as a no start, no communication,immo light flashing A used module was sourced and then I became involved.
Did my thing now its broke again
This thing is holding all the injectors on and has every indication of it being another bad module.
My question is: what on the input or output side could render this thing as a no start,no comm. after 2 days of driving?
Check for something sending power into the processor. I have had 2 Hondas of that vintage with antitheft transceiver rings that failed and sent 12 volts into the pcm killing it. Each took several key cycles to do it. What I did to find it was before I installed a replacement module I turned the key on and went pin by pin through the PCM connectors measuring voltage and comparing it to a pin…
Thanks Tim, that is incredibly helpful. I was sorta looking for a silver bullet in this case as " it's an 04 CRV and all the money has been soent" scenario