Test C: Reference Voltage

NOTE
This Pinpoint Test is intended to diagnose the following:
- Sensor harness circuits: SIG RTN, VREF
- 3-wire sensors: Throttle Position (TP) sensor, differential pressure feedback EGR sensor, A/C Pressure (ACP) sensor, Fuel Tank Pressure (FTP) sensor, Power Steering Pressure (PSP) sensor, Fuel Rail Pressure (FRP) Sensor And Barometric (BARO) pressure sensor.
- Powertrain Control Module (PCM)

Pinpoint Test Schematics and Connectors

2.0L 4V Focus:

2.0L 4V Escort, 2.0L Contour/Mystique/Cougar:

LS6/LS8:

All Others:

Sensors Connected To VREF

Sensors Connected To VREF:

Pinpoint Tests