Pinpoint Test B: Powertrain Control Module (Pcm) Power Relay: Introduction: Notes
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Milan, and 2006 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- harness circuits: PCMRC, ISP-R
- vehicle power
- ignition start/run
- PCM power relay ground
- battery positive voltage
- PCM power relay (12A646)
- PCM (12A650)
NOTE:
The IGN START/RUN and ground circuits, or the B+ and VPWR circuits may be reversed in the harness connector. Refer to the appropriate SYSTEM WIRING DIAGRAMS
for schematic and connector information.