Check the CKP and CMP Signal While Cranking Test: Purpose
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of this test is to verify the CMP and CKP sensors and circuits are functioning.
Scan Tool - Data List Monitoring
- The scan tool may reset below 9.5 volts.
- Select the parameters indicated from the scan tool parameter list and monitor while cranking the engine.
NOTE:
You may need to use an outside power source for the scan tool.
| Parameter | Specification | Measurement |
|---|---|---|
| RPM | 150 RPM minimum | |
| SYNC | YES |
Low RPM may be caused by starting or charging system concerns. No RPM indicated while cranking may indicate a CKP concern.