Pinpoint Test Z: Intermittent: Introduction

NOTE: This pinpoint test is intended to diagnose and isolate intermittent concerns for the following:
All Electronic EC subsystems.
Coil pack ignition systems using the distributorless ignition system tester (DIST).
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 in REFERENCE VALUES - CNG, FLEX-FUEL & GASOLINE . If the vehicle has a coil pack system with a no start condition, perform the ignition test with the distributorless ignition system tester. Do not use the DIST for coil on plug applications.

NOTE: There are 2 main procedures used to isolate and repair an intermittent concern. One uses the Rotunda Distributorless Ignition System Tester (DIST) or equivalent, and the other uses a diagnostic tool with DMM functionality.

PCM/TCM PIDS/SIGNALS

PCM/TCM PIDS/SIGNALS	Associated Circuit	Test Type
4X4	4X4	input
ACCS	A/CCS	input
ACCR	ACCR	input
ACET	ACET	input
ACFDS	ACFDS	input
ACLPCS	ACLPCS	input
ACP,ACPV	ACPSW	input
ACRDV	ACRDV	output
ACRSW	ACRSW	input
Use Digital Multimeter	AFC	input
AMC	AMC	output
APP1	APPS	input
APP2	APPS	input
APP3	APPS	input
BARO	BARO	input
BPP/BOO	BPP	input
Use Digital Multimeter	BPS	input
CAS GND	case GND	input
CCS	CCS	output
Use Digital Multimeter	CD-A (primary)	output
Use Digital Multimeter	CD-B (primary)	output
Use Digital multimeter	CD-C (primary)	output
Use Digital Multimeter	CD-D (primary)	output
CHT, CHT V	CHT	input
CKP/CPS	CKP	input
CMP/CID	CMP	input
CTO	CTO	output
DCE	DC/DC CONVERT	output
EGRMC1	EGR	output
EGRMC2	EGR	output
EGRMC3	EGR	output
EGRMC4	EGR	output
EFC*	EFC	output
CVV	EVAPCV	output
EVMV	EVAP	output
FC1	FC1/LFC	output
FC2	FC2/MFC	output
FC3	FC3/HFC	output
FP	FPDM	output
FPM	FPDM	input
FRP	FIPT/S	input
FRT	FIPT/S	input
FTIV	FTIV	output
FTPT	FTPT	input
GSDN	GSDN	output
HPCR	HPCR	output
HOS11	HEGO	input
HOS12	HEGO	input
HOS13	HEGO	input
HTR11	HEGO	output
HTR12	HEGO	output
HTR13	HEGO	output
IAT	IAT	input
INJ1	INJECTOR	output
INJ2	INJECTOR	output
INJ3	INJECTOR	output
INJ4	INJECTOR	output
Use Digital Multimeter	KAPWR	input
KS1P	KS	input
MAF	MAF	input
MAP/TMAP	MAP	input
MECP	MECP	output
MECT	MECT	input
MSDN	MSDN	output
PAZV	PAZV	output
PSR	PSR	output
SAIR	Secondary AIR	output
SAIRM	Secondary AIRM	input
SCV	SCV	output
SCVM	SCVM	input
TGAC*	TGAC	output
TMAC*	TMAC	output
TPCMD1	TACM+/ETB	output
TPCMD2	TACM-/ETB	output
TP1	TP	input
TP2	TP	input
TR-A1	TRANS	input
TR-A2	TRANS	input
TR-A3	TRANS	input
TSS/ISS	TSS	input
CAMDCR,RCAM	VCT	output
VPWR	VPWR	input
Use Digital Multimeter	VREF	output
Use Digital Multimeter	VSO	output
VSS	VSS+	input
WAC	WAC	output