Pinpoint Test QA: Unable to Activate Self-Test/Network Communication Error: Introduction

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, 2010 Lincoln Town Car, and 2010 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

unable to communicate with powertrain control module (PCM)
unable to activate the PCM self-test
incorrect self-test procedure
harness circuits: ISP-R, PCMRC, PWRGND and VPWR

Fig 1: Electronic Throttle Body Throttle Position Sensor (ETBTPS) Connector

Courtesy of FORD MOTOR CO.

Fig 2: Throttle Position (TP) Sensor Connector

Courtesy of FORD MOTOR CO.

For PCM connector views or reference values, refer to REFERENCE VALUES .

POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PIN REFERENCE CHART

Vehicle	Connector	Pin	Circuit
Crown Victoria, Grand Marquis, Ranger, Town Car	170 Pin	B47, B48, B49, B50 B35, B36	PWRGND VPWR
E-Series 4.6L, E-Series 5.4L	190-Pin	B22, B69, B70 B67, B68 B38 B42	PWRGND VPWR PCMRC ISP-R
E-Series 6.8L, F-Series Super Duty	170 Pin	B47, B48, B49, B50 B35, B36 B37 B31	PWRGND VPWR PCMRC ISP-R
Edge, Flex 4V 3.5L, MKS 3.7L, MKT 3.7L, MKX, Taurus 4V 3.5L	190-Pin	B67, B68, B69, B70 B51, B52, B53 B8 B7	PWRGND VPWR PCMRC ISP-R
Explorer, Explorer SportTrac, Mountaineer, Mustang	170 Pin	B47, B48, B49, B50 B35, B36 B37 B46	PWRGND VPWR PCMRC ISP-R
Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L	190-Pin	B67, B68, B69, B70 B35, B36, B51 B38 B42	PWRGND VPWR PCMRC ISP-R
Fusion 3.5L, MKZ	140 Pin	B67, B68, B69 B51, B52 B35 B37	PWRGND VPWR PCMRC ISP-R
All other vehicles	190-Pin	B69, B70 B67, B68 B38 B42	PWRGND VPWR PCMRC ISP-R