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 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 is determined:

• | Powertrain On Board Diagnostic System Check is completed.

• | No Diagnostic Trouble Codes (DTCs).

• | 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 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:

Eng 1: Engine Data 1 List
EGR: Exhaust Recirculation Valve Data
EVAP: Evaporative Emissions Data
Cat: Exhaust Catalyst Data
HO2S: Heated Oxygen Sensor Data
IPC: Instrument Panel Cluster
Misfire: Cylinder Misfire Data
ODD: 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 | Misfire | RPM | Varies
1-2 Solenoid | ODD | OK/Fault/Invalid State | OK
2-3 Solenoid | ODD | OK/Fault/Invalid State | OK
Abuse Management | Misfire | Active/Inactive | Inactive
A/C High Side Pressure | Eng 1 | Volts/psi/kPa | Varies
A/C Pressure Disable | Eng 1 | Yes/No | No
A/C Relay | ODD | OK/Fault/Invalid State | OK
A/C Request | Eng 1, Misfire, EGR | Yes/No | No
Actual EGR Position | Eng 1, EGR, Misfire | % | 0
Air Fuel Ratio | Cat, HO2S, AIR | Ratio | 14.7:1
AIR Pump Relay | AIR, Eng 1, HO2S | On/Off | Off
AIR Active Test AIR Injection | AIR | Yes/No | No
AIR Active Test Inhibit | AIR | Yes/No | Yes
AIR Active Test Passed | AIR | Yes/No | Yes
AIR Diagnostic Complete | AIR | Yes/No | Yes
AIR Passive Test 1 Passed | AIR | Yes/No | Yes
AIR Passive Test 2 Failed | AIR | Yes/No | No
Air Passive Test Passed | AIR | Yes/No | Yes
AIR Passive Test in Progress | AIR | Yes/No | No
AIR Passive Test Inhibited | AIR | AIR | Yes
AIR Pump Relay | AIR, ODD | OK, Fault, Invalid State | OK
AIR Solenoid | AIR, Eng 1, HO2S | On/Off | Off
AIR Solenoid | AIR, ODD | OK, Fault, Invalid State | OK
Brake Switch | Eng 1 | Applied/Released | Released
BARO | Eng 1, EGR, EVAP, Cat | kPa/Volts | 65-110 kpa / psi/3.5-4.8 Volts
Cam Signal Present | Misfire | Yes/No | Yes
Commanded A/C | Eng 1, Cat, Misfire | On/Off | Off
Command Fuel Pump | Eng 1 | On/Off | On
Commanded Gen | IPC | On/Off | On
Cruise Mode | Eng 1 | On/Off | Off
Cruise Inhibited | Eng 1 | Yes/No | Yes
Cruise Inhibited | ODD | OK, Fault, Inactive State | OK
Current Gear | CAT, EGR | Transmission Gear Position | 1 (Park)
Cycles Of Misfire Data | Misfire | Counts | Cycles 0-99
Cyl. 1-6 Ckt. History | ODD | OK/Stuck Low (open)/Stuck High/Fault | OK
Cyl. 1-6 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 | % | 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 | AIR, Eng 1, EGR, EVAP, Cat, HO2S, Misfire | °C/°F | Varies
EGR Closed Valve Pintle | EGR | Volts | 0.14-1.0
EGR Duty Cycle | EGR | % | 0
EGR Feedback | EGR | Volts | 0.14-1.0
EGR Flow Test Count | EGR | Counts | 0-10
EGR Position Error | EGR | % | 0-100
Engine Load | AIR, Eng 1, Cat, Misfire, Evap | % | Varies
Engine Oil Level | IPC | Low/OK | OK
Engine Oil Life | IPC | % | 0-100
Engine Oil Pressure | IPC | Low/OK/High | OK
Engine Run Time | AIR, Eng 1, EVAP, EGR, Cat, HO2S | Hr: Min: Sec | Varies
Engine Speed | Eng 1, EGR, EVAP, Cat, HO2S, Misfire | RPM | Varies
EVAP Canister Purge | AIR, Eng 1, EVAP, HO2S | % | Low and Varying
EVAP Fault History | EVAP | No Fault/Excess Vacuum/Purge Valve Leak/Small Leak/Weak Vacuum | No Fault
EVAP Purge Solenoid | Evap, ODD | OK/Fault/Invalid State | OK
EVAP Vent Solenoid | Eng 1, EVAP, HO2S | Open/Closed | Varies
EVAP Vent Solenoid | 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 | % | 0-100
Fuel Pump | Eng 1 | On/Off | On
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 Hg/Volts | Varies
Fuel Trim Cell | AIR, Eng 1, CAT | 0-4 | 0
Fuel Trim Learn | Eng 1, Cat, EVAP | Enabled/Disabled | Varies
Generator PWM | IPC | % | Varies
HO2S Sensor 1 | Eng 1, CAT, HO2S | Ready/Not Ready | Ready
HO2S Sensor 1 | AIR, CAT, Eng 1, HO2S, Misfire | millivolts | 0-1000 and Varying
HO2S Sensor 2 | Eng 1, Cat, HO2S | millivolts | 0-1000 and Varying
HO2S XCounts | Eng 1, HO2S | Counts | Varies
Hot Mode | Misfire | On/Off | Off
Hot Open Loop | Cat | Active/Inactive | Inactive
IAC Position | ENG 1, CAT | Counts | Varies
IAT | AIR, Eng 1, EGR, EVAP, Cat, HO2S | °C/°F | Varies
Ignition 1 | AIR, Eng 1, EGR, CAT, HO2S, IPC, Misfire | Volts | 9.6-14.5
Ignition Mode | Eng1 | IC/Bypass | IC
Injector Pulse Width | Eng 1, Cat, HO2S, Misfire | milliseconds | Varies (1.5-3.5)
Knock Retard | Eng 1, EGR | Degrees | 0
Long Term FT | AIR, Eng 1, EVAP, HO2S, Misfire | % | -10-10
Loop Status | AIR, Eng 1, EGR, EVAP, Cat, HO2S | Open/Closed | Closed
MAF | AIR, Eng 1, EGR, EVAP, Cat, HO2S, Misfire | Grams per Second | 3-6 (depends on altitude)
MAF Frequency | Eng 1 | Hz | 1200-3000 (depends on altitude)
MAP | Eng 1, Cat, EGR, EVAP | 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 | AIR, Cat, Eng 1, EGR, EVAP, Misfire, ODD, HO2S, IPC | Pass/Fail | Pass
Power Enrichment | Cat, EGR, HO2S, Misfire | Active/Inactive | Inactive
Short Term FT | AIR, Eng 1, HO2S | % | -10-10
Spark | Eng 1, Misfire | Degrees | Varies
Start Up ECT | AIR, Cat, EVAP, HO2S | °C/°F | Varies
Start Up IAT | AIR, Cat, EVAP, HO2S | °C/°F | Varies
TCC Engaged | Eng 1, EGR, Misfire | Engaged/Disengaged | Disengaged
TCC Solenoid | ODD | OK/Fault/Invalid State | OK
Total Misfire Current Count | Misfire | Counts | 0
Total Misfire Failures Since First Fail | Misfire | Counts | 0
Total Misfire Passes Since First Fail | Misfire | Counts | Varies
TP Sensor | Eng 1 | Volts | 0.5-0.9
TP Angle | AIR, Cat, EGR, Eng 1, EVAP, HO2S, Misfire | % | 0
Traction Control | Eng 1, Misfire | Active/Inactive | Inactive
Traction Control Desired Toque | Eng 1 | % | 100
Traction Control Torque | Eng 1 | % | 80-90 (varies)
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 P | Eng 1 | Low/High | Low
TWC Protection | EGR, Cat | Active/Inactive | Inactive
Vehicle Speed | Eng 1, EGR, EVAP, Cat, Misfire | MPH/Km/h | 0
VTD Fuel Disable | Eng 1 | Active/Inactive | Inactive