For 1990-2009 cars

The Engine Scan Tool Data List contains all of the engine related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given 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 are determined:

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

• | No diagnostic trouble codes (DTCs) are present.

• | The 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 from a normally running engine.

Important: A scan tool that displays faulty data should not be used. Any scan tool concern 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 Symptoms for diagnosis.

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

Engine Data1: The engine data 1 list
Catalyst Data: The exhaust catalyst data
EGR Data: The exhaust recirculation valve data
EVAP Data: The evaporative emissions data
IPC Data: The instrument panel cluster data
HO2S Data: The heated oxygen sensor data
Misfire Data: The cylinder misfire data
AIR Data: The air injection reaction data
ODD Data: The output driver data

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released
3X Crank Sensor | Misfire | RPM | Varies
24X Crank Sensor | Eng 1, Misfire | RPM | Varies
1-2 Sol. | ODD | OK/Fault/Invalid State | OK
2-3 Sol. | ODD | OK/Fault/Invalid State | OK
Abuse Management | Misfire | Active/Inactive | Inactive
A/C High Side Pressure | Eng 1 | Volts/PSI | Varies
A/C Off for WOT | Eng 1 | Yes/No | No
A/C Relay | ODD | OK/Fault/Invalid State | OK
A/C Request | Eng 1, EGR, Misfire | Yes/No | No
A/C Pressure Disable | Eng 1 | Yes/No | No
Actual EGR Position | Eng 1, EGR, Misfire | Percent | 0
Air Fuel Ratio | AIR, Cat, HO2S | Ratio | 14.2:1 - 14.7:1
Air Active Test Inhibit | AIR | Yes/No | --
Air Active Test Air Injection | AIR | Yes/No | --
Air Diagnostic Complete | AIR | Yes/No | --
Air Passive Test 1 Pass | AIR | Yes/No | --
Air Passive Test 2 Fail | AIR | Yes/No | --
Air Passive Test Passed | AIR | Yes/No | --
Air Passive Test Inhibit | AIR | Yes/No | --
Air Passive Test In Progress | AIR | Yes/No | --
Air Pump Relay | Eng 1, AIR, HO2 | On/Off | Off
Air Pump Relay | ODD | OK/Fault/Invalid | Fault
Air Solenoid | AIR, ODD | OK/Fault/Invalid | Fault
Air Solenoid | Eng 1, HO2S, AIR | On/Off | Off
BARO | Eng 1, EGR, EVAP, Cat | kPa/volts | 65-110 kPa / 3.5-4.5 volts
Brake Switch | Eng 1 | Applied/Released | Released
CMP Sensor Signal Present | Eng 1, Misfire | Yes/No | Yes
Commanded A/C | Eng 1, Cat, Misfire, EGR | On/Off | Off
Commanded Fuel Pump | Eng 1 | On/Off | On
Commanded Gen | IPC | On/Off | On
Commanded Starter | Eng 1 | Enabled/Disabled | Disabled
Cruise Mode | Eng 1 | On/Off | Off
Cruise Inhibit Signal Command | Eng 1 | On/Off | ON
Cruise Inhibited | ODD | OK/Fault/Invalid State | OK
Current Gear | Cat, EGR | Transmission Gear Position | Park (1)
Cycles Of Misfire Data | Misfire | Counts | 0-99
Cyl. 1-6 Injector CKT History | ODD | OK/Stuck Low (open)/Stuck High/Fault | OK
Cyl. 1-6 Injector CKT Status | ODD | OK/Stuck Low (open)/Stuck High | OK
Decel Fuel Mode | EGR, HO2S, Misfire, | Active/Inactive | Inactive
Desired EGR Position | Eng 1, EGR, Misfire | Percent | 0
Desired Idle Speed | Eng 1 | RPM | PCM Controlled (varies)
Driver Module 1 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled
Driver Module 2 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled
Driver Module 3 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled
Driver Module 4 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled
ECT | Eng 1, AIR, EGR, EVAP, Cat, HO2S, Misfire | °C/°F | Varies
EGR Closed Val. Pintle Pos. | EGR | Volts | 0.14-1.0
EGR Duty Cycle | EGR, Eng 1 | Percent | 0
EGR Feedback | EGR | Volts | 0.14-1.0
EGR Flow Test Count | EGR | Counts | 0-10
EGR Position Error | EGR | Percent | 0-100
Engine Load | Eng 1, Cat, Misfire, EGR, EVAP, AIR | Percent | 2-10
Engine Run Time | Eng 1, EVAP, Cat, EGR, AIR, HO2S | Hr: Min: Sec | Varies
Engine Speed | Eng 1, EGR, EVAP, Cat, HO2S, Misfire, | RPM | Varies
Engine Oil Level | IPC | OK/Low | OK
Engine Oil Life | IPC | Percent | 0-100
Engine Oil Pressure | IPC | OK/Low/High | OK
EVAP Canister Purge | EVAP, HO2S, Eng 1, AIR | Percent | Low and Varying
EVAP Fault History | EVAP | No Fault/Excess Vacuum/Purge Valve Leak/Small Leak/Weak Vacuum | No Fault
EVAP Purge Sol. | ODD, EVAP | OK/Fault/Invalid State | OK
EVAP Vent Sol. | Eng 1, HO2S, EVAP | Open/Closed | Open
EVAP Vent Sol. | EVAP, ODD | OK/Fault/Invalid State | OK
Fans High Speed | Eng 1, Cat | On/Off | Off
Fans Low Speed | Eng 1, Cat | On/Off | Off
FC Relay 1 | ODD | OK/Fault/Invalid State | OK
FC Relay 2 and 3 | ODD | OK/Fault/Invalid State | OK
Fuel Level | EVAP, IPC | Percent | 0-100
Fuel Pump CKT History | ODD | OK/Stuck Low (open)/Stuck High/Fault | OK
Fuel Pump CKT Status | ODD | OK/Stuck Low (open)/Stuck High/Fault | OK
Fuel Tank Pressure | EVAP | in H2O/ volts | Varies
Fuel Trim Cell | Eng 1, Cat, AIR | 0-4 | 0
Fuel Trim Learn | Eng 1, Cat, EVAP | Enabled/Disabled | Enabled
HO2S Sensor 1 | Eng 1, HO2S, Cat | Ready/Not Ready | Ready
HO2S Sensor 1 | Eng 1, Cat, HO2S, Misfire, AIR | Millivolts | 0-1000 and Varying
HO2S Sensor 2 | Eng 1, HO2S, Cat | Millivolts | 0-1000 and Varying
HO2S X Counts | HO2S, Eng1 | Counts | Varies
Hot Open Loop | EGR, Cat | Active/Inactive | Inactive
Hot Mode | Misfire | On/Off | Off
IAC Position | Eng1, Cat | Counts | Varies
IAT | Eng 1, EVAP, Cat, HO2S, EGR, AIR | °C/°F | Varies
Ignition 1 | Eng 1, EGR, Misfire, IPC, Cat, HO2S, AIR | Volts | Varies
Ignition Mode | Eng 1 | IC/Bypass | IC
Injector Pulse Width | Eng 1, Cat, Misfire, HO2S | Milliseconds | Varies (1.5-3.5)
Knock Retard | Eng 1, EGR | Degrees | 0
Long Term FT | Eng 1, EVAP, HO2S, AIR | Percent | 0
Loop Status | Eng 1, Cat, HO2S, EVAP, EGR, AIR | Open/Closed | Closed
MAF | Eng 1, Cat, HO2S, EGR, EVAP, AIR, Misfire | Grams per Second |
MAF Frequency | Eng 1 | Hz | 1200-3000 (depends on altitude and engine load)
MAP | Eng 1, EGR, EVAP, Cat | kPa/volts | 20-48 kPa/ 0.75-2 volts (depends on altitude)
MIL | IPC | On/Off | Off
MIL | ODD | OK/Fault/Invalid State | OK
Misfire Current Cyl. 1-6 | Misfire | Counts | 0
Misfire History Cyl. 1-6 | Misfire | Counts | 0
Non-Volatile Memory | Eng 1, EVAP, IPC, AIR EGR, Cat, HO2S, Misfire, AIR, ODD | Pass/Fail | Pass
Power Enrichment | Eng 1, Cat, EGR, HO2S, Misfire, | Active/Inactive | Inactive
Short Term FT | Eng 1, AIR, HO2S | Percent | 0-10
Spark | Eng 1, Misfire | Degrees | 20 (varies)
Start Up ECT | EVAP, HO2S, Cat, AIR | °C/°F | Varies
Start Up IAT | HO2S, Cat, AIR, EVAP | °C/°F | Varies
Starter Enable Relay | ODD | Ok/Fault/Invalid State | Ok
TCC Engaged | Eng 1, EGR, Misfire | Engaged/Disengaged | Disengaged
TCC Sol. | ODD | OK/Fault/Invalid State | OK
Total Misfire Current Count | Misfire | Counts | 0
Total Misfire Failures | Misfire | Counts | 0
Total Misfire Passes Since First Fail | Misfire | Counts | 0
TP Sensor | Eng 1, EGR, Cat, HO2S | Volts | 0.20-0.74
TP Angle | Eng 1, EGR, Cat, HO2S, Misfire, EVAP, AIR | Percent | 0
Traction Control | Eng 1, Misfire | Active/Inactive | Inactive
Traction Control Desired Torque | Eng 1 | Percent | 100
Traction Control Torque | Eng 1 | Percent | Varies by engine load and vehicle speed
Transmission Range | Eng 1, Cat, EGR | Transmission Gear Position | Park
TR Switch A | Eng 1 | Low/High | Low
TR Switch B | Eng 1 | Low/High | High
TR Switch C | Eng 1 | Low/High | High
TR Switch Up | Eng 1 | Low/High | Low
TWC Protection | Cat | Active/Inactive | Inactive
Vehicle Speed | Eng 1, EGR, Cat, Misfire, EVAP | MPH / Km/h | 0
VTD Fuel Disable | Eng 1 | Active/Inactive | Inactive