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qb3: Check Power Circuit to Keep Alive Memory
Steps _Key off, wait 10 seconds
_Disconnect processor 60 pin connector. Inspect for damaged pins, corrosion, loose wires, etc. Service as necessary.
_Install breakout box, leave processor disconnected
_DVOM on 20 volt scale
_Connect positive test lead to Test Pin 1 and negative test lead to Test Pin 40 or 60 at the breakout box.
_Key ON
Result Is voltage less than 10.5 volts?
Direction YES

Service open circuit. Remove breakout box. Reconnect processor. Rerun Quick Test.


Remove breakout box. Replace processor. Rerun Quick Test.

Notes If on initial Key On Engine Off Self-Test, no voltage to the processor is observed, a Code 15 will be generated.