PINPOINT TEST B: Powertrain Control Module (PCM) Power Relay: Introduction
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 Wiring Diagrams Manual Electronic Engine Control Cell for schematic and connector information.
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 .
POWERTRAIN CONTROL MODULE CONNECTOR PINS REFERENCE CHART
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Crown Victoria, Grand Marquis, Ranger, Town Car | 170 PIN | B35, B36 | VPWR |
| E-Series 6.8L | 170 PIN | E23 B35, B36 B31 B37 |
INJPWRM VPWR ISP-R PCMRC |
| Edge, MKX | 190-PIN | B33 B67, B68 B42 B38 |
INJPWRM VPWR ISP-R PCMRC |
| Explorer | 190-PIN | B67, B68 B48 B38 |
VPWR ISP-R PCMRC |
| F-150 6.2L, F-150 5.0L, F-150 3.7L | 190-PIN | B67, B68 B42 B38 |
VPWR ISP-R PCMRC |
| F-150 3.5L | 198 PIN | B101, B102, B103 B48 B58 |
VPWR ISP-R PCMRC |
| Fiesta | 128 PIN | B11, B12, B8 B8 B1 |
VPWR ISP-R PCMRC |
| Flex 4V 3.5L, MKS 3.7L, MKT 3.7L, Taurus 4V 3.5L | 190-PIN | B33 B51, B52, B53 B7 B8 |
INJPWRM VPWR ISP-R PCMRC |
| Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L | 190-PIN | B21 B35, B36, B51 B42 B38 |
INJPWRM VPWR ISP-R PCMRC |
| Fusion 3.5L, MKZ | 140 PIN | B45 B51, B52 B37 B35 |
INJPWRM VPWR ISP-R PCMRC |
| All other vehicles | 190-PIN | B21 B67, B68 B42 B38 |
INJPWRM VPWR ISP-R PCMRC |