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Scan Data

NOTE: Information contained in SCAN DATA  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 a minimum of every 1 1/4 seconds, more often on most models. Not all devices and systems are used on all models; following lists only represent most commonly used parameters. For additional information, refer to owner manual furnished with tester.
SCAN DATA

Tester Position Units Measured Nominal Value
A/C Clutch On/Off On With A/C
A/C Request Yes/No Yes With Request
BARO Volts 3.0-4.5
Battery Voltage Volts 13.5-14.5
Brake Switch App/Rel Applied with Brakes On
Canister Purge Sol. On/Off On/Engine Cold (Idle Some)
Clear Flood On/Off See Tester Manual
Coolant Fan(s) On/Off On With Command
Coolant Temp. °C 85-105° (Norm. Temperature)
Crank RPM RPM 100-900
Cross Counts Counts 0-255
EGR Solenoid On/Off On When Energized
EGR Duty Cycle 0-100% 0/Closed; 100/Fully Open
Fan Relay On/Off On When Energized
Fan Request On/Off On With Request
Fuel Back-Up Yes/No Yes When Engaged
Fuel Trim (ST) Counts 110-150 ((1) 128 Normal)
Fuel Trim (LT) Counts 110-150 ((1) 128 Normal)
IAC Counts 0-50
Ignition/Crank On/Off On With Ignition/Crank
Injector Pulse Width Mil./Sec .8-3.0
Intake Air Temp. °C 10-90°
Knock Retard Counts 0-255
Knock Signal Yes/No Yes When Knock Exists
MAP Volts 1.0 (Idle) to 4.5 (WOT)
"Open/Closed Loop Status" Ol/Cl Closed/Open During
O2 Sensor Millivolts 100 (Lean) To 999 (Rich)
P/N Switch P/N/RDL Park/Neutral
P/S Switch Norm/Hi Normal
PROM I.D. PROM # Original Factory Number
QDM Hi/Lo Lo Energized
RPM RPM Spec. +/-25 RPM Drive (A/T); Spec. +/-50 RPM Neut. (M/T)
Spark Advance Degrees Varies
TCC On/Off Off (On With Command)
TP Sensor Volts 1.00 (Idle) To 5.00 (WOT)
Throttle Angle 0-100% 0 (Idle) To 100 (WOT)
Throttle Switch Open/Closed Open At Off Idle
Trans. Fluid Temp. °C 100 (Normal)
Trouble Codes Code No. No Codes
Upshift Light (M/T) On/Off Off
VSS Or MPH MPH 0-Actual
1st Gear Switch On/Off On/1st Gear Only
3rd Gear Switch On/Off On/3rd & 4th Gear
4th Gear Switch On/Off On/4th Gear
(1) Long Term (LT) fuel trim has a tendency to follow Short Term (ST) fuel trim. Extended idle may drive ST fuel trim to read less than 100 counts.