c4: Check for Excess Voltage on VREF Circuit
| Steps | _Key Off, wait 10 seconds
_Breakout box installed _Disconnect processor _Key On, engine Off _DVOM on 20 volt scale _Measure voltage between Test Pin 26 at the breakout box and battery ground |
| Result | Is voltage less than .5 volts? |
| Direction | YES
Remove breakout box. Reconnect sensor. Replace processor. Rerun Quick Test NO Service short to battery power in EEC harness. Remove breakout box. Reconnect processor and sensor. Rerun Quick Test. If condition persists, replace processor. |