Full Function Carburetor - Scan Data Specifications

NOTE: Information contained in the following table is typical of readings taken on vehicle with engine idling, upper radiator hose hot, closed throttle, transmission in Park or Neutral, "closed loop" status achieved and all accessories off (except as noted in tables). Data parameters are updated every 1 1/4 seconds. On systems using P-4 computers, parameter updates are virtually instantaneous. Not all devices & systems are used on all models.

FULL FUNCTION CARBURETED

Tester Position	Units Measured	Nominal Data Value
A/C Request	Yes/No	No/Yes (with request)
AIR Divert Sol.	On/Off	On (air to switching sol.)
AIR Divert Sol.	On/Off	Off (air to atmosphere).
AIR Switching Sol.	On/Off	On (to exhaust manifold).
AIR Switching Sol.	On/Off	Off (to catalytic converter).
BARO	Volts	3-4.5.
Battery Voltage	Volts	13.5-14.5.
Canister Purge Sol.	On/Off	On engine cold (some at idle).
Coolant Temp.	°C	85-105° (norm. temp.).
Cross Counts	Counts	0-255.
EGR Solenoid	On/Off	On when energized.
EGR Duty Cycle	0-100%	0/closed-100/fully open.
ILC Solenoid	On/Off	On extended/Off retracted.
Knock Retard (ESC)	Counts	0-255.
M/C Dwell	Degrees	10-50° varying.
O2 Sensor	Millivolts	100 (lean) to 999 (rich).
Open/Closed Loop Status	Ol/Cl	Closed/Open during extended idle.
Pressure Sensor	Volts	3.0-4.5 (idle), 0-1 (WOT).
P/N Switch	P/N/RDL	Park/Neutral.
PROM I.D.	PROM #	Original factory number.
RPM	RPM	Spec. +/-25 RPM Drive (auto.).
RPM	RPM	Spec. +/-50 RPM Neut. (man.).
TCC	On/Off	Off (On with command).
TPS	Volts	.5 (closed) to 5.0 (WOT).
Trouble Codes	Code #	No codes.
VSS or MPH	MPH	0-actual.

NOTE: Condensed, general SYMPTOM DIAGNOSIS and INTERMITTENTS articles are located in TROUBLE SHOOTING section, if necessary. See TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL INFORMATION section.