For 1990-2009 cars

Use the Typical Scan Data Values table only after the Diagnostic System Check - Engine Controls has been completed, no DTCs were noted, and you have determined 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 Typical Scan Data values represent values that would be seen on a normally running engine.

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

Only the parameters listed below are referred to in this service manual for use in diagnosis. For further information on using the scan tool to diagnose the powertrain control module (PCM) and related sensors, refer to the applicable reference section listed below. If all values are within the typical range described below, refer to Symptoms - Engine Controls . The Typical Scan Data Values table contains all the parameters included in the following data lists arranged in alphabetical order:

• | Engine Data 1--Contains general information regarding fuel delivery, idle air control (IAC) position, heated oxygen sensor (HO2S) 1, HO2S 2, and other basic engine operating conditions.

• | Engine Data 2--Contains general information regarding engine coolant temperature (ECT), intake air temperature (IAT), mass air flow (MAF), manifold absolute pressure (MAP), and other basic engine operating conditions.

• | EGR Data--Contains information specific to the exhaust gas recirculation (EGR) system. This list displays parameters required to verify proper EGR system operation.

• | EVAP Data--Contains information specific to the evaporative emissions (EVAP) control system. Also displays parameters required to verify proper EVAP system operation.

• | Fuel Trim Data--Contains information specific to the Fuel Trim operation. Also displays parameters required to verify proper Fuel Trim operation.

• | Misfire Data--Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire.

• | Output Driver Data--Contains information specific to output driver circuits. This data monitors circuit status, and circuit history.

For scan tool parameter definitions, refer to Scan Tool Data Definitions .

Important: Use the Typical Scan Data Values only after the following conditions are met:

• | The Diagnostic System Check-Engine Controls has been completed.

• | The engine is idling unless checking a value at a specified RPM.

• | The throttle is closed unless checking a value at a specified RPM.

• | The vehicle is in PARK or NEUTRAL.

• | The vehicle is operating in Closed Loop.

• | The vehicle accessories are turned OFF.

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
3X Crank Sensor | Engine 2 | RPM | Varies, Same as Engine Speed
24X Crank Sensor | Engine 2 | RPM | Varies, Max 1700
A/C High Side Pressure Sensor | Engine 2 | kPa/PSI/Volts | Varies with refrigerant temperature
A/C Pressure Disable | Engine 2 | Yes/No | No
A/C Relay Circuit Status | Output Driver | Fault/OK | OK
A/C Relay Command | Engine 1, Engine 2, EGR, Misfire | On/Off | Off
A/C Request Signal | Engine 2 | Yes/No | No
Air/Fuel Ratio | Engine 2, Fuel Trim | Ratio | 14.7:1
BARO | Engine 1, EGR, EVAP, Fuel Trim | kPa | 98/varies
CMP Sensor Signal Present | Engine 2 | Yes/No | Yes
Cruise Control Active | Engine 1 | Yes/No | No
Cruise Inhibit Reason | Engine 1 | Varies | Vehicle Speed
Cruise Inhibit Signal Circuit Status | Output Driver | Fault/OK | OK
Cruise Inhibit Signal Command | Engine 1 | On/Off | On
Current Gear | Engine 1, Engine 2, EGR, Fuel Trim | 1/2/3/4 | 1
Cycles of Misfire Data | Misfire | Counts | Varies
Cylinder 1 Injector Circuit Status | Output Driver | Fault/OK | OK
Cylinder 2 Injector Circuit Status | Output Driver | Fault/OK | OK
Cylinder 3 Injector Circuit Status | Output Driver | Fault/OK | OK
Cylinder 4 Injector Circuit Status | Output Driver | Fault/OK | OK
Cylinder 5 Injector Circuit Status | Output Driver | Fault/OK | OK
Cylinder 6 Injector Circuit Status | Output Driver | Fault/OK | OK
Cylinder 1 Injector Circuit History | Output Driver | Fault/OK | OK
Cylinder 2 Injector Circuit History | Output Driver | Fault/OK | OK
Cylinder 3 Injector Circuit History | Output Driver | Fault/OK | OK
Cylinder 4 Injector Circuit History | Output Driver | Fault/OK | OK
Cylinder 5 Injector Circuit History | Output Driver | Fault/OK | OK
Cylinder 6 Injector Circuit History | Output Driver | Fault/OK | OK
Decel. Fuel Cutoff | EGR, Fuel Trim | Active/Inactive | Inactive
Desired EGR Position | Engine 1, EGR, Misfire | %/Volts | 0%/0 Volts
Desired Idle Speed | Engine 1, Engine 2, EVAP | RPM | Within 50 RPM of actual engine speed
Driver Module 1 Status | Output Driver | Enabled / Disabled | Enabled
Driver Module 2 Status | Output Driver | Enabled/Disabled | Enabled
Driver Module 3 Status | Output Driver | Enabled/Disabled | Enabled
Driver Module 4 Status | Output Driver | Enabled/Disabled | Enabled
ECT Sensor | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | °C/°F | Varies with engine temperature
EGR Flow Test Count | EGR | Count | 0
EGR Learned Minimum Position | EGR | Volts | 0.71 Volts
EGR Position Sensor | Engine 1, EGR, Misfire | %/Volts | 0%/0 Volts
EGR Position Variance | EGR | % | 0%
EGR Solenoid Command | EGR | % | 0%
Engine Load | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | % | 17%
Engine Oil Level Switch | Engine 2 | OK/Not OK | OK
Engine Oil Life Remaining | Engine 2 | % | varies
Engine Oil Pressure Switch | Engine 2 | OK/Low | OK
Engine Run Time | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | Hr:min:sec | varies
Engine Speed | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | RPM | Within 50 RPM of actual engine speed
EVAP Fault History | EVAP | No Fault/Excess Vacuum/Purge Valve Leak/Small Leak/Weak Vacuum | No Fault
EVAP Purge Solenoid Circuit Status | Output Driver | Fault/OK | OK
EVAP Purge Solenoid Command | Engine 1, EVAP, Fuel Trim | % | 19%
EVAP Test Abort Reason | EVAP | Not Aborted/Lost Enable/Small Leak/Vehicle Not At Rest | Not Aborted
EVAP Test Result | EVAP | No Result/Passed/ Aborted/Fail DTCXXXX | Passed
EVAP Test State | EVAP | Wait for Purge/Test Running/Test Completed | Test Completed
EVAP Vent Solenoid Circuit Status | Output Driver | Fault/OK | OK
EVAP Vent Solenoid Command | Engine 1, EVAP, Fuel Trim | Venting/Not Venting | Venting
FC Relay 1 Circuit Status | Output Driver | Fault/OK | OK
FC Relay 1 Command | Engine 2 | On/Off | Off
FC Relay 2 and 3 Circuit Status | Output Driver | Fault/OK | OK
FC Relay 2 and 3 Command | Engine 2 | ON/Off | Off
Fuel Level Sensor | EVAP | Volts | 0.8 V at empty to 2.5 V at full
Fuel Pump Relay Circuit Status | Output Driver | Fault/OK | OK
Fuel Pump Relay Circuit History Status | Output Driver | Fault/OK | OK
Fuel Pump Relay Command | Engine 1 | On/Off | On
Fuel Tank Level Remaining | EVAP | % | Varies
Fuel Tank Pressure Sensor | Engine 1, EVAP | On/Off | On
Fuel Trim Cell | Engine 1, EVAP, Fuel Trim | Cell # | Varies
Fuel Trim Learn | Engine 1, EVAP, Fuel Trim | Enabled/Disabled | Enabled
Gen F. Terminal Signal | Engine 2 | % | 27%
Generator L-Terminal Signal Command | Engine 2 | On/Off | On
HO2S 1 | Engine 1, EVAP, Fuel Trim | mV | 0-1000
HO2S 2 | Engine 1, Fuel Trim | mV | 0-1000
HO2S 1 Heater Command | Fuel Trim | On/Off | On
IAC Position | Engine 1, EGR, Fuel Trim | Counts | 15
IAT Sensor | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, | °C/°F | Varies with ambient temperature
Ignition 1 Signal | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, | Volts | 12.8 Volts
Ignition Mode | Engine 2 | Bypass/IC | IC
Injector PWM | Engine 2, Fuel Trim, Misfire | ms | 2.90 ms
Knock Retard | Engine 1, EGR | Degrees | 0°
Long Term FT | Engine 1, Engine 2, EVAP, Fuel Trim, | % | -3
Loop Status | Engine 1, Engine 2, EGR, EVAP, Fuel Trim | Open/Closed | Closed
MAF Sensor | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | g/s /Hz | 3.41g/s /2000Hz
MAP Sensor | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | kPa/Volts | 35 kPa/1.35V
MIL Circuit Status | Output Driver | Fault/OK | OK
MIL Command | Engine 2 | On/Off | Off
Misfire Current Cyl. #1 | Misfire | 0-198 Counts | 0
Misfire Current Cyl. #2 | Misfire | 0-198 Counts | 0
Misfire Current Cyl. #3 | Misfire | 0-198 Counts | 0
Misfire Current Cyl. #4 | Misfire | 0-198 Counts | 0
Misfire Current Cyl. #5 | Misfire | 0-198 Counts | 0
Misfire Current Cyl. #6 | Misfire | 0-198 Counts | 0
Misfire History Cyl. #1 | Misfire | 0-65535 Counts | 0
Misfire History Cyl. #2 | Misfire | 0-65535 Counts | 0
Misfire History Cyl. #3 | Misfire | 0-65535 Counts | 0
Misfire History Cyl. #4 | Misfire | 0-65535 Counts | 0
Misfire History Cyl. #5 | Misfire | 0-65535 Counts | 0
Misfire History Cyl. #6 | Misfire | 0-65535 Counts | 0
Number of DTCs | Engine 1, EVAP, Fuel Trim | # | 0
O2 Heater Current | Fuel Trim | Amps | 0.54 Amps
PCM/VCM in VTD Fail Enable | Engine 1 | Yes/No | No
PCM Reset | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Output Driver | Yes/No | No
Power Enrichment | Engine 2, Misfire | Active/Inactive | Inactive
Short Term FT | Engine 1, Engine 2, EVAP, Fuel Trim | % | 0%
Spark | Engine 1, Engine 2, Fuel Trim, Misfire, | Degrees | 18°
Start Up ECT | Engine 2, EVAP, Fuel Trim | °C/°F | Varies
Start Up IAT | Engine 2, EVAP, Fuel Trim | °C/°F | Varies
TCC Brake Pedal Switch | Engine 1, Engine 2 | Applied/Released | Released
TCC PWM Solenoid Command | Engine 2, Misfire | On/Off | Off
TFP Sw. | Engine 2, EGR, Fuel Trim | Park/Reverse/Neutral/ Drive 4/Drive 3/Drive 2/Drive 1 | Park/Neutral
Torque Delivered Signal | Engine 2 | % | 86%
Torque Request Signal | Engine 2 | % | 100%
TP Sensor | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire, | Volts/% | 0.59V/0%
Traction Control Status | Engine 2 | Active/Inactive | Inactive
Vehicle Speed Sensor | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire, | mph/km/h | 0
VTD Auto Learn Timer | Engine 1 | Active/Inactive | Inactive
VTD Fuel Disable | Engine 1 | Active/Inactive | Inactive
VTD Fuel Disable Until Ign. OFF | Engine 1 | Yes/No | No