Scan Tool Data List
TYPICAL TECH 1 SCAN DATAThe "SCAN" data values, listed below, are typical for the test parameters of a Tech-1 or equivalent scan tool connected to the Data Link Connector DLC), and under the following conditions:
^ Engine running at idle/closed throttle.
^ Engine at normal operating temperature.
^ System operating in "closed-loop".
^ Accessories "OFF".
^ Brake NOT applied.
Many of the parameters show "data" rather than voltage or resistance values, and cannot be read using a volt/ohm meter.
PARAMETER UNITS TYPICAL VALUE
Engine Speed RPM ± 100 RPM from desired idle(± 50 RPM in drive)
Desired Idle RPM Powertrain Control Module (PCM)varies w/temperature
Engine Cool Temp °C°F Varies 85-109°C (185-223°F)
Intake Air Temp °C°F Varies 10-80°C (50-176°F) depends on underhood temperature
MAP kPa/Volts 29 - 48 kPa (1-2 volts)
BARO kPa/Volts 58 - 114 kPa (2.5-5.5) volts depending on altitude and barometric pressure
Throttle Position Volts 0.29 - 0.98
Throttle Angle Percent (%) 0%
Heated Oxygen (HO2S) Millivolts (mV) Varies (100-1000) varying
Injector Pulse Width M/sec (milliseconds) 3 - 6 and varying
Spark Advance Degrees Advance 18°-24°
Spark Retard Degrees Timing Retard 0°
S. T. Fuel Trim Counts varies
L. T. Fuel Trim Counts 110 - 150
Loop Status Open/Closed Loop Closed Loop
Fuel Trim Cell Cell # 16 (idling in Park or Neutral)
Fuel Trim Inable No/Yes Yes
MPH km/h MPH km/h 0.0
Fuel EVAP Purge 0-100 0%
Spark Advance # of Degrees 18°-24°
Spark Retard DEG. Timing Retard 0°
Knock Signal No/Yes No(Yes,indicates knock is being detected)
EGR 1/EGR 2/EGR 3 Off/ON Off(On when commanded by PCM)
Idle Air Control Counts (steps) 5 - 50
Trans Range Switch Gear Selected Park or Neutral
TCC PWM Sol. 0-100% 0%
TCC Apply Sol Off/On Off
Ign Control 24X Sig RPM +/- 100 RPM from desired idle
(±50 RPM in drive)
Ign Control CAM Sig 0/1 Varies (off-on-0ff-0n)
TCC Off/On Off(On when commanded by PCM)
System Voltage Volts 13.5-14.5
Fuel Pump Volts Volts 13.5-14.5
Air Pump Relay On/Off Off
A/C Request Yes/No No
A/C Clutch On/Off Off
A/C Pressure PSI/Volts Varies(Depends on temperature)
Fan #1,Fan #2 Off/ON On at 108°C/228°F) with A/C On or Off. Fan turns off when temp falls to 104°C/219°F)
Injector Fault OK/Fault OK
Shift Solenoid "A" Off/On Off (On when commanded by PCM)
Shift Solenoid "B" Off/On Off (On when commanded by PCM)
P A (PRNDL) Lo/Hi Lo/Hi Park (Lo Lo)
B C (PRNDL) Lo/Hi Lo/Hi Park (Hi Hi)
Trans Range Switch Gear Selected Park or Neutral
TCC PWM Sol. 0-100% 0%
Trans Fluid Temp. -40°C-151°C 75°C-100°C
TCC Brake Switch Released/Applied Released (applied when brake pedal is depressed)
TCC Slip Speed RPM 0-4000 RPM
DTC Ign Counter Varies 0 (Counts Key Cycles)
#DTC Stored Varies 0 (Counts DTC(s) Stored)
Time From Start Hrs/Min Varies
SMCC Engaged Yes/No No (Yes when commanded by PCM)
SMCC Inhibited No/Yes No (Yes when commanded by PCM)
Low Oil Light Off/On Off (On when commanded by PCM)
Hot Engine Light Off/On Off (On when command by PCM)
2nd GR. Start SW. On/Off On (Off in 2nd gear)
TCC Off/On Off (On when commanded by PCM)
2nd 3rd Yes/No No/Yes No (Yes, with transmission 2nd gear enabled. No (Yes, with transmission 3rd gear enabled)