PINPOINT TEST Z: Intermittent: Introduction

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: This vehicle is equipped with high voltage cables, components, and wiring. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables and wiring are orange in color. Certified rubber insulating gloves and a face shield must be worn when working with the high voltage cables, components, or wiring. The ignition key must be cycled to the OFF position for a minimum of 5 minutes, and the high voltage traction battery service disconnect plug placed in the servicing/shipping position before disconnecting the high voltage cables. Failure to follow these instructions may result in personal injury or death.

Do not disconnect, disable, or touch the high voltage cables, components, or wiring during the module reprogramming procedure because high voltage is present. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables and wiring are orange in color. Failure to follow these instructions may result in personal injury or death.

Appropriate repair methods and procedures are essential for the safe, reliable operation of all motor vehicles, as well as the personal safety of the individual doing the work. This article provides general directions for repairing vehicles with tested, effective techniques. Following them helps to establish reliability. There are numerous variations in procedures, techniques, tools, and parts for repairing vehicles, as well as in the skill of the individual doing the work. This article cannot possibly anticipate all such variations and provide advice or cautions as to each. Accordingly, anyone who departs from the instructions provided in this article must first establish that they compromise neither their personal safety nor the vehicle integrity by their choice of methods, tools, or parts.

This pinpoint test is intended to diagnose and isolate intermittent concerns for the following:

all electronic engine control (EEC) subsystems
transaxle assembly (7000)

This chart is used to determine which test to run for the suspect circuit. Corresponding PIDs to each circuit are listed. Some circuits do not have an associated PID or the PID may not be available and has to be measured with a digital multimeter (DMM). More specific PIDs can be found in the REFERENCE VALUES article.

PCM/TCM PIDS/SIGNALS

PCM/TCM* PIDS/SIGNALS	Associated Circuit	Test Type
ACCR	A/CCR	output
ACCS	A/CCS	input
AC_ET	ACET	input
ACFDS_P	A/CFDS	input
Use DMM	A/CLPCS	input
ACP	A/CPSW	input
ACRDV	A/CRDV	output
ACRSW	A/CRSW	input
AMC	AMC	output
APP1	APPS1	input
APP2	APPS2	input
APP3	APPS3	input
ARPMDES, ENG_CTO	CTO	input
BPO, BPO_HZ	BPO	input
BPP/BOO	BPP	input
Use DMM	BPS	input
Use DMM	CD-A (primary)	output
Use DMM	CD-B (primary)	output
Use DMM	CD-C (primary)	output
Use DMM	CD-D (primary)	output
CHT, CHT V	CHT	input
Use DMM	CKP(+)	input
Use DMM	CMP	input
Use DMM	CTO	output
DCE, DCE_F	DCE	output
Use DMM	DCF	input
EGRMC1	EGRMC1	output
EGRMC2	EGRMC2	output
EGRMC3	EGRMC3	output
EGRMC4	EGRMC4	output
EVAPCV	CANV	output
EVAPPDC	VMV	output
FP	FP	output
FPM	FPM	input
FRP, FRP_V	FRP	input
FRT, FRT_V	FRT	input
FTIV	FTIV	output
FTP, FTP_V	FTP	input
G_SDN, Use DMM	GSDN	output
G_SDN_A, G_SDN_C	GSDN	input
GTQ_CMD	TGAC	input
GTQ_CMD*	TGAC	output
HFC	FC3	output
HPUMP	HPCR	output
HTR11	HTR11	output
HTR12	HTR12	output
IAT, IAT_V	IAT	input
INJ1	INJ1	output
INJ2	INJ2	output
INJ3	INJ3	output
INJ4	INJ4	output
ISDN1*	ISDN1	input
ISDN2*	ISDN2	input
Use DMM	KAPWR	input
KEYST	ISP-R	input
KEYST	ISP-RS	input
KS1	KS(+)	input
LFC	FC1	output
MAF, MAF_V	MAF	input
MAP	MAP	input
MECP	MECP	output
Use DMM	MECT	input
MFC	FC2	output
M_SDN, Use DMM	MSDN	output
MTQ_OUT	TMAC	input
MTQ_OUT*	TMAC	output
O2S11SV	HO2S11	input
O2S12SV	HO2S12	input
PSR	PSR	output
TACM (+)	TACM (+)	output
TACM (-)	TACM (-)	output
TP1	TP1	input
TP2	TP2	input
TR-A1	TR-A1	input
TR-A2	TR-A2	input
TR-A3	TR-A3	input
VPWR	VPWR	input
Use DMM	VREF	output