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  1. 10-03-2019 #2
    NISANDA
    NISANDA is offline
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    This is the Bench harness i use to read ALL 99 to 06 PCMs (Gen 3), 4Cil (ecotec Blue/clear), V6 (Blue/clear) and all V8 (Blue/Red, Blue/Green).

    Connector one PCM C1 BLUE
    PIN#19 Power Ignition *Hot in RUN*
    PIN#20 Battery *Hot At All Times*
    PIN#1 PCM Ground
    PIN#58 DLC Class 2 Data
    PIN#40 PCM Ground
    PIN#75 Power Ignition *Hot in RUN*

    OBDII Data Connector
    PIN#2 <=> PIN#58 DLC Class 2 Data (Purple)
    PIN#4 <=> Ground
    PIN#5 <=> Ground
    PIN#16 <=> 12V *Hot At All Times*

    That's it, Maybe you pcm different? or where do you get the diagram?
    Last edited by NISANDA; 10-03-2019 at 08:36 AM.
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