Pinpoint Test B: Powertrain Control Module (Pcm) Power Relay: Introduction: Notes
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.