PINPOINT TEST Z: Intermittent: Introduction

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Crown Victoria Police Interceptor vehicles equipped with fire suppression system, refer to part 419-03 for Important Safety Warnings. Failure to follow these instructions may result in personal injury.

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

all electronic engine control (EEC) subsystems

This chart is used to determine which test to run for the suspect circuit. PIDs corresponding 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 information on the PID can be found. If the vehicle has a coil pack system with a no start condition, carry out the ignition test.

PCM PIDS/SIGNALS

PCM/TCM PIDS/SIGNALS	Associated Circuit	Test Type
ACCS	A/CCS	input
ACET	ACET	input
ACP	ACPSW	input
AIR	AIR	output
AIRM	AIRM	input
APP1	APPS	input
APP2	APPS	input
APP3	APPS	input
BPP/BOO	BPP	input
BPA	BPS	input
Use DMM	CD A-J (primary)	output
CHT	CHT	input
CKP	CKP	input
CMP	CMP	input
CPP/PNP	CPP	input
DPFEGR	DPFE	input
ECT	ECT	input
EGRMC1	EGRMC1	output
EGRMC2	EGRMC2	output
EGRMC3	EGRMC3	output
EGRMC4	EGRMC4	output
EGRMDSD	EGRMC	output
EVR	EVR	output
EOT	EOT	input
EPC, EPCV	EPC	output
EVAPCV	CV	output
EVAPPDC	VMV	output
EVAPPF	VMV	output
FANDC	VDF	output
FANSS	FANSS	input
FLI	FLI	input
FP	FP	output
FPM	FPM	input
FP M	FPM	input
FRP	FRP	input
FRT	FRT	input
FTP	FTP	input
HFC	HFC	output
HOS11	HEGO	input
HOS12	HEGO	input
HOS13	HEGO	input
IAC	IAC	output
IAT	IAT	input
IAT2	IAT 2	input
IMRC	IMRC	output
IMRC1M	IMRCM	input
IMTV1	IMTV1	output
IMTV2	IMTV2	output
KS1	KS1	input
KS2	KS2	input
LFC	LFC	output
MAF, MAF V	MAF	input
MAP V	MAP	input
O2S11	O2S	input
O2S12	O2S	input
O2S13	O2S	input
OSS	OSS	input
PSP	PSP	input
PSPT	PSP	input
PTO	PTO	input
TACM (+)	TACM (+)	output
TACM (-)	TACM (-)	output
TP1	TP1	input
TP2	TP2	input
TCIL	TCIL	output
TP	TP	input
VCT1	VCT1	output
VCT2	VCT2	output
VPWR	VPWR	input
Use DMM	VREF	output
Use DMM	VSO	output
VSS	VSS+	input
WAC	WAC	output