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Home >> Chevrolet >> 1998 >> Metro Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 1.0L >> Self-Diagnostic System >> Scan Tool Data
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Scan Tool Data

NOTE: Information contained in the following tables is typical of readings taken on a vehicle with engine idling at normal operating temperature, throttle closed, transmission in Park or Neutral, system in closed loop status, and all accessories off (except as noted in tables). For additional information, see scan tool owner's manual.
SCAN TOOL DATA VALUES

Scan Tool Parameters (1) Typical Data Value
Air Conditioning Off
BARO (2) 12.9-14.4 psi (89-99 kPa)
Battery Voltage 12-14 Volts
Closed Throttle Switch Idle
Desired Idle Speed 850 RPM
ECT 176-194°F (80-90°C)
EGR Solenoid Vacuum Valve Off
EGR By-Pass Solenoid Off
Electrical Load Signal (3) No
Engine Coolant Fan (4)
Engine Speed 750-950
Engine Load 3-5%
EVAP Duty Cycle 0-100%
EVAP Density Trim 0-14 Counts (Varies)
EVAP Vent Solenoid (5) Off
Fuel Cutoff Signal Off
Fuel Injector PWM 0.8-2.3 mS
Fuel Level (6) Varies
Fuel Pump On
Fuel Tank Pressure Control Solenoid Varies
Fuel Tank Pressure (7) 0.0 mmHg
Fuel Trim (Long Term) (8) -20%-+20%
Fuel Trim (Short Term) (8) -20%-+20%
HO2S-1 (9) 50-950 mV
HO2S-2 (9) 50-950 mV
HO2S-1 Ready Yes
HO2S-2 Ready Varies
IAT 68-95°F (20-35°C)
ISC Duty Cycle 25-40%
Loop Status Closed
MAP (Pressure) 4.2-6.8 psi (29-47 kPa)
MAP (Voltage) (2) 1.32-1.90 volts
Spark Advance Adjust Test Switch Off
Spark -1°-18°
Starter Switch Released
Total Fuel Trim (9) -35%-+35%
TP Angle 7-18%
TP Sensor 0.42-1.15 Volts
Vehicle Speed Zero MPH (Zero km/h)
(1) Scan tool parameters are with vehicle at idle, upper radiator hose hot, closed throttle, transaxle in Park or Neutral, computer controls in closed loop and accessories off.
(2) Varies with vacuum, barometric pressure and altitude.
(3) With all electrical accessories off.
(4) Varies with engine coolant temperature.
(5) Solenoid is off when coolant temperature is less than 176°F (80°C).
(6) Varies with amount of fuel in tank. Should be 70 percent with a full tank. Scan tool indicates 0.0 mmHg when fuel tank pressure equals barometric pressure.
(7) With fuel cap removed.
(8) Counts are 128 and vary.
(9) Varies.