c7: Check for Shorted MAP/BP Sensor
| Steps | _Key Off, wait 10 seconds
_Breakout box installed _Processor connected _Disconnect MAP/BP sensor _Key On, engine Off _DVOM on 20 volt scale _Measure voltage between Test Pin 26 and Test Pin 46 at the breakout box. |
| Result | Is voltage less than 4.0 volts? |
| Direction | YES
Vehicles equipped with VAF sensor, GO to Continue All other vehicles, GO to Continue NO Replace MAP/BP sensor. Remove breakout box. Reconnect processor and sensor(s). Rerun Quick Test |
| Component | Barometric Absolute Pressure Sensor |
| Description | The
BP sensor measures barometric pressure using a frequency. This gives
the EEC information on engine load. The BP is used as a barometric
pressure sensor for altitude compensation, updating the EEC during Key
On Engine Off and every wide-open throttle.
The EEC uses the BP information for: Spark advance EGR flow Air/Fuel ratio |
| Location | Mounted behind Integrated Relay Controller; in front of passenger strut tower. |
| Wire Colors | Orange with White stripe
Light Green with Black stripe Black with White stripe |
| Notes | While the BP has a port typical of a MAP sensor, this port is NOT hooked to any vacuum source, and simply is a atmosphere vent. |