Pinpoint Test Z: Intermittent: Introduction

This pinpoint test is intended to diagnose and isolate intermittent concerns for all electronic engine control (EEC) subsystems.

This chart is used to determine which test to run for the suspect circuit. Parameter identifiers (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 in REFERENCE VALUES .

PCM PIDS/SIGNALS REFERENCE

PCM/PIDS/SIGNALS	Associated Circuit	Test Type
AAT	AAT	Input
APP1	APP1	Input
APP2	APP2	Input
BOO1	BPP	Input
BOO2	BPS	Input
Use DMM	CD A-J (primary)	Output
CAC_T	CACT	Input
CAC_V	CACT	Input
CACCT	CACCTS	Input
CACCT_V	CACCTS	Input
CHT	CHT	Input
CKP	CKP	Input
CMP	CMP	Input
CPP/PNP	CPP	Input
ECT	ECT	Input
EGRMC1	EGRMC1	Output
EGRMC2	EGRMC2	Output
EGRMC3	EGRMC3	Output
EGRMC4	EGRMC4	Output
EGRMDSD	EGRMC	Output
EGRVR	EGRVR	Output
EVAPCV	CANV	Output
FANDC	VDF	Output
FANSS	FANSS	Input
FANVAR	FCV	Input
FLI	FLI	Input
FLP	FLP	Input
FP	FP	Output
FP M	FPM	Input
FRP	FRP	Input
FRT	FRT	Input
FTP	FTP	Input
HFC	HFC	Output
IAT	IAT	Input
IAT2	IAT	2 Input
IMRC	IMRC	Output
IMRC1M	IMRC1	Input
IMRC2M	IMRC2	Input
IMTV	IMTV1	Output
KNOCK_1	KS1	Input
KNOCK_2	KS2	Input
LFC	LFC	Output
MAF, MAF V	MAF	Input
MAP V	MAP	Input
MFC	MFC	Output
O2S12	HO2S12	Input
O2S22	HO2S22	Input
OSS	OSS	Input
PTO	PTO	Input
SCIP, SCIP V	TCIP	Input
TACM (+)	TACM (+)	Output
TACM (-)	TACM (-)	Output
TCBP	TCBP	Input
TCBP_V	TCBP	Input
TP	TP	Input
TP1	TP1	Input
TP2	TP2	Input
TURBO_BP1_STAT	TCBY	Output
TURBO_BP2_STAT	TCBY2	Output
TURBO_WGATE	TCWRVS	Output
TWGATE_STAT	TCWRVS	Output
VCT1	VCT1	Output
VCT2	VCT2	Output
	VPWR	Input
Use DMM	VREF	Output
Use DMM	VSO	Output
VSS	VSS+	Input
WGATE_PRES	WVS	Input
WGATE_V	WVS	Input