Diagnostic Aids

WARNING: This page is about a different car, the 1995 Ford Windstar and 1995 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This code indicates that On Board Diagnostics II (OBD II) monitor testing has not been completed. To erase code, a complete drive cycle, with successful OBD II monitor self-test, must occur.

A drive cycle consists of vehicle warmed to normal engine temperature and operated in all speed ranges. After all monitors test successfully, SYSTEM PASS can be retrieved from PCM.

DTC P1000 will set in PCM memory when any of the following conditions occur:

Battery or PCM has been disconnected.
An OBD II monitor has failed before completion of drive cycle.
PCM memory has been erased with a scan tester.

1) Check For Other DTCs

If any trouble codes are present, service as necessary. If no trouble codes are present, go to next step.

2) Test drive vehicle to complete drive cycle. Cruise at 20-45 MPH for at least 4 minutes. Cruise at 30-40 MPH for at least 60 seconds. Cruise at 40-65 MPH for at least 80 seconds. If DTC P1000 is still present, go to next step. If DTC P1000 is not present, testing is complete.

3) Turn ignition off. Connect scan tester to Data Link Connector (DLC). Using scan tester, access VSS PID. Test drive vehicle to complete drive cycle. If VSS PID is more than zero, go to next step. If VSS PID is zero, repair open in VSS circuit and repeat QUICK TEST.

4) Ensure engine is at operating temperature. Using scan tester, access ECT PID. If ECT PID is more than 180°F (82°C), repeat drive cycle. If ECT PID is less than 180°F (82°C), repair cooling system fault and repeat QUICK TEST.