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c9: Short to Ground in VREF
Steps _Key Off wait 10 seconds
_Breakout box installed
_Processor disconnected
_Disconnect TP and MAP/BP, EVP/PFE and VAF, if so equipped.
_DVOM on 200 ohm scale.
_Measure resistance between Test Pin 26 and Test Pins 20, 40, 46, and 60 at the breakout box
Result Is any resistance less than 5 ohms?
Direction YES

Remove breakout box. Reconnect processor. Service short to ground. Connect all sensors. Rerun Quick Test. If original condition still exists, replace processor

NO

Remove breakout box. Reconnect sensors. Replace processor. Rerun Quick Test