Associated Equipment GM L36, GM L67, GM LS1 manual Appendix, Scan Parameters

Appendix

Scan Parameters

Please note that not every vehicle will support every parameter. For example, most V6-equipped vehicles do not have a passenger-side O2 sensor; therefore, codes such as LFT2 & O2R will return “T.O.” (timeout). The engine type selected on the Config screen will also determine which parameters are available on the screen when you’re configuring the scanner.

Standard OBD2 Parameters: (supported by all compatible vehicles except as stated above)

Parameter	Description	Typical Value
B	Boost (L67 only)	0 to 10 PSI at wide-open throttle
CLSD	Closed-loop status	0 (open loop) when cold
		1 (closed loop) after engine
		warms up
ECT	Engine coolant temperature	185-220 deg F
IAT	Intake air temperature	Depends on the weather; rises
		above ambient as engine warms
		up
IGN	Ignition advance	Varies: 15-20 degrees at idle, 20-
		30 at full throttle
LD	Engine load (calculated by	0-100%, depending on conditions.
	the vehicle’s computer)	2 or 3% or so at idle.
LFT1	Long-term fuel trim, driver’s	-10 to +10%
LFT2	side & passenger side	Zero after battery change or
		vehicle computer reset
MAF	Mass air flow	From 0.5-1 lb/min at idle to 30-
		35 at full throttle
MAP	Manifold air pressure	9-10”Hg at idle to near 30 at full
		throttle
O2L	Oxygen sensor, driver’s side	Should move around a lot after
O2R	Oxygen sensor, passenger	engine warms up; 850mV to
	side	950mV at full throttle
RPM	Engine speed	600-700 at warm idle, up to 6000
		or more before shifts at full
		throttle
SPD	Vehicle speed	Should match speedometer
SFT1	Short-term fuel trim, driver’s	-10 to +10%
SFT2	side & passenger side	Zero after battery change or
		vehicle computer reset

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