Engine Scan Tool Data List. Geo Prizm 1997

For 1990-2009 cars

The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in the order shown on the scan tool.

Use the Engine Scan Tool Data List only after performing the following inspections:

• | Powertrain On-Board Diagnostic System Check is completed.

• | No Diagnostic Trouble Codes (DTCs) are present.

• | On-board diagnostics are functioning properly.

Scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.

Important: A scan tool that displays faulty data should not be used. The scan tool problem should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to service category Symptoms for diagnosis.

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Engine Idling/Upper Radiator Hose Hot/Closed Throttle/Transmission in Park or Neutral/Closed Loop
Engine Speed | Engine Data | RPM | 650-750 RPM
TP Angle | Engine Data | % | 8-11%
ECT | Engine Data | °C (°F) | 80°C to 90°C (176°F to 194°F)
IAT | Engine Data | °C (°F) | Varies with underhood and ambient air temperatures
MAP (Voltage) | Engine Data | Volts | 1.32-2.20 Volts (varies with barometric pressure and altitude)
MAP (Pressure) | Engine Data | kPa | 28-47 kPa (varies with barometric pressure and altitude)
Engine Load | Engine Data | % | 19.7% to 49.3%
Inj. PWM Cyl #1 | Engine Data | ms | 2.2-4.8 ms
IAC Duty Cycle | Engine Data | % | 27-47%
Engine Speed At Misfire | Engine Data | RPM | 0 RPM
Load at Misfire | Engine Data | G/Rev | 0.00 G/Rev
Total Misfire Current Count | Engine Data | counts | 0
O2S 1 | Engine Data | mV | varies
HO2S 2 | Engine Data | mV | varies
Short Term FT | Engine Data | % | -20% to 20%
Short Term FT | Engine Data | Counts | 128 Counts (varies)
Long Term FT | Engine Data | % | -20% to 20%
Long Term FT | Engine Data | Counts | 128 Counts (varies)
Total Fuel Trim | Engine Data | Counts | 0.25 to 0.75 (varies)
Diagnostic Mode | Engine Data | Normal/Check | Normal
O2S 1 L/R Response Time | Engine Data | ms | 0 to 1000 ms
O2S 1 R/L Resonse Time | Engine Data | ms | 0 to 1000 ms
Decel Fuel Mode | Engine Data | Active/Inactive | Inactive
Loop Status | Engine Data | Open/Closed | Closed Loop
Spark | Engine Data | degrees | 8° to 18°
Vehicle Speed | Engine Data | km/h/mph | 0 km/h
TCC Solenoid* | Engine Data | On/Off | Off
PNP | Engine Data | P-N/R-D-L | P-N
TCC Brake Switch* | Engine Data | Released/Applied | Released
Electrical Load | Engine Data | Yes/No | No
A/C Switch | Engine Data | On/Off | Off
Command A/C | Engine Data | On/Off | Off
Starter Switch | Engine Data | Released/Cranking | Released
No. of Emission Related DTCs | Engine Data | counts | 0
* 4-spd Automatic Transmission Equipped Vehicles Only