P025 - 24X reference signal low
I have an intermittant P025 sometimes current and sometimes history. The C4 connector at the ICM has some minor (?) corrision at C4 A pin which is for the lt blu/black wire. I have been unsuccessful at cleaning this connector. Any recommendation how to clean it would be appreciated.
Also, Diagnostic tree for P025 begins:
engine running
backprob pcm terminal '3F1' to ground ...
I have never done this. Please offer guidance.
Is there a probe point at the PCM? or can the connector be disconnected while the engine is running? or do I insert a sewing machine needle in the lt blu/black wire at the PCM connection or ???
I have an intermittant P025 sometimes current and sometimes history. The C4 connector at the ICM has some minor (?) corrision at C4 A pin which is for the lt blu/black wire. I have been unsuccessful at cleaning this connector. Any recommendation how to clean it would be appreciated.
Also, Diagnostic tree for P025 begins:
engine running
backprob pcm terminal '3F1' to ground ...
I have never done this. Please offer guidance.
Is there a probe point at the PCM? or can the connector be disconnected while the engine is running? or do I insert a sewing machine needle in the lt blu/black wire at the PCM connection or ???