PINPOINT TEST B: Powertrain Control Module (PCM) Power Relay: Introduction
This pinpoint test is intended to diagnose the following:
- harness circuits: B+, IGN START/RUN, INJPWRM, ISP-R, PCMRC, VPWR and GND
- PCM power relay (12A646)
- PCM (12A650)
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES article.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series 4.6L, E-Series 5.4L | 190-PIN | B21 | INJPWRM |
| B30, B67, B68 | VPWR | ||
| B42 | ISP-R | ||
| B38 | PCMRC | ||
| E-Series 6.8L | 170 PIN | E23 | INJPWRM |
| B35, B36 | VPWR | ||
| B31 | ISP-R | ||
| B37 | PCMRC | ||
| Edge 3.5L, Edge 3.7L, MKX | 190-PIN | B33 | INJPWRM |
| B67, B68 | VPWR | ||
| B42 | ISP-R | ||
| B38 | PCMRC | ||
| Edge 2.0L, Explorer 2.0L | 154 PIN | B5, B6 | VPWR |
| B15 | ISP-R | ||
| B27 | PCMRC | ||
| Explorer 3.5L, F-150 6.2L, F-150 5.0L, F-150 3.7L | 190-PIN | B67, B68 | VPWR |
| B42 | ISP-R | ||
| B38 | PCMRC | ||
| F-150 3.5L | 198 PIN | B101, B102, B103 | VPWR |
| B42 | ISP-R | ||
| B58 | PCMRC | ||
| Fiesta | 128 PIN | B11, B12, B8 | VPWR |
| B8 | ISP-R | ||
| B1 | PCMRC | ||
| Flex 4V 3.5L, MKS 3.7L, MKT 3.7L, Taurus 4V 3.5L | 190-PIN | B33 | INJPWRM |
| B51, B52, B53 | VPWR | ||
| B7 | ISP-R | ||
| B8 | PCMRC | ||
| Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L | 190-PIN | B21 | INJPWRM |
| B35, B36, B51 | VPWR | ||
| B42 | ISP-R | ||
| B38 | PCMRC | ||
| Focus | 154 PIN | B21 | INJPWRM |
| B5, B6 | VPWR | ||
| B15 | ISP-R | ||
| B27 | PCMRC | ||
| Fusion 3.5L, MKZ | 140 PIN | B45 | INJPWRM |
| B51, B52 | VPWR | ||
| B37 | ISP-R | ||
| B35 | PCMRC | ||
| All other vehicles | 190-PIN | B21 | INJPWRM |
| B67, B68 | VPWR | ||
| B42 | ISP-R | ||
| B38 | PCMRC |