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 alphabetical order. A parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following conditions are determined:

• | The Diagnostic System Check - Engine Controls is completed.

• | There are no diagnostic trouble codes (DTCs).

• | The on-board diagnostics are functioning correctly.

Scan tool values from an engine that is operating correctly may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents the values that would be seen on a normal operating engine.

Important: Do not use a scan tool that displays faulty data. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool may result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service information for use in diagnosis.

The column labeled Data List indicates where a parameter is located on the scan tool. Review the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:

All: The Parameter is in all data lists indicated below.
Eng 1: Engine Data 1
Eng 2: Engine Data 2
Eng 3: Engine Data 2
O2S/HO2S: Oxygen Sensor Data

Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values
--- | --- | --- | ---
Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories Off
A/C Evap. Temperature Sensor | Eng 2, 3 | -40° to +130°C (-40° to +266°F) | Varies
A/C High Side Pressure Sensor | Eng 2 | 0-5 Volts | Varies
A/C High Side Pressure Sensor | Eng 2, 3 | kPa/psi | Varies
A/C Relay Command | Eng 3 | On/Off | Off
A/C Request Signal | Eng 3 | Yes/No | No
BARO | Eng 2 | 65-104 kPa | Varies with altitude
Case Diagnostic Learning | Eng 3 | Learned/Not Learned | Learned
CASE Learned Cyl. 1 | Eng 3 | Counts | Varies
CASE Learned Cyl. 2 | Eng 3 | Counts | Varies
CASE Learned Cyl. 3 | Eng 3 | Counts | Varies
CASE Learned Cyl. 4 | Eng 3 | Counts | Varies
Desired Idle Speed | Eng 2 | 0-8,000 RPM | 800 RPM
DTC Set This Ignition | Eng 1 | Yes/No | No
ECT Sensor | ALL | -40° to +130°C (-40° to +266°F) | Varies
ECT Sensor | Eng 2 | 0-5 Volts | Varies
EC Ignition Relay Command | Eng 3 | On/Off | On
EGR Position Sensor | Eng 2 | 0-5 Volts | 0.6-0.75 Volts
EGR Solenoid Command | Eng 2, 3 | 0 - 100% | 0%
Engine Load | Eng 1 | 0-99% | 20-30% - Idle 10-20% - 2500 RPM
Engine Speed | ALL | 0-8,000 RPM | 750-825 RPM
EVAP Purge Solenoid Command (If Equipped) | Eng 2, 3 | 0-100% | Varies
Fan High | Eng 3 | On/Off | Varies
Fan Low | Eng 3 | On/Off | Varies
Fuel Gage Control | Eng 3 | 0-100% | Varies
Fuel Level Sensor | Eng 2 | 0-5 Volts | Varies
Fuel Level Sensor | Eng 2, 3, HO2S | 0-100% | Varies
Fuel Pump Relay Command | Eng 3 | On/Off | On
HO2S 1 Heater Command | HO2S | 0-100% | Varies
HO2S 2 Heater Command | HO2S | 0-100% | Varies
IAT Sensor | Eng 1, 3, HO2S | -39° to +140°C (-38° to +284°F) | Varies
IAT Sensor | Eng 2 | 0-5 Volts | Varies
Idle Switch | Eng 2 | On/Off | On
Ignition 1 Signal | Eng 2, 3, HO2S | Volts | 12.0-14.5 Volts
Injector PWM | Eng 2 | 0-9 ms | 4.6-5.4 ms
ISC Command | Eng 2 | 0 - 100% | Varies
ISC Motor Position Sensor | Eng 2 | 0 - 100% | Varies
ISC Motor Position Sensor | Eng 2 | 0-5 Volts | Varies
Knock Sensor | Eng 2 | 0-5 Volts | Varies
Long Term FT | Eng 1 | -50% to +50% | 0%
Loop Status | Eng 1, HO2S | Open Loop/Closed Loop | Closed Loop
LT FT Cruise/Accel. | H02S | -50% to +50% | 0%
LT FT Idle/Decel | H02S | -50% to +50% | 0%
MAP Sensor | Eng 2, 3, HO2S | kPa | 32-40 kPa Varies with Altitude
MIL Command | Eng 1 | On/Off | Off
O2S/HO2S 1 | Eng 2, HO2S | 0-1,006 mV | Varies 400-800 mV
O2S/HO2S 2 | Eng 2, HO2S | 0-1,006 mV | Varies 400-800 mV
Octane Level | Eng 3 | -7 to +7 Counts | Vaires
Short Term FT Avg. | HO2S | -50% to +50% | -3% to +3%
Short Term FT | Eng 1, HO2S | -50% to +50% | -3% to +3%
Spark | Eng 1 | -20 to +40 Degrees | 2-10 Degrees
TP Sensor | Eng 2 | 0-5 Volts | 4.0-4.5 Volts
TP Sensor | Eng 3, H02S | % | 3-5 %
Transmission Gear Selector Signal | Eng 2, 3, H02S | Park/Neutral/In Gear | Park/Neutral
Vehicle Security Status | Eng 3 | Enabled/Disabled | Disabled
Vehicle Speed Sensor | All | km/h mph | 0 km/h (0 mph)