Use the Typical Scan Data Values table only after the Powertrain On Board Diagnostic (OBD) System Check 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, HO2S2, 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. |
| • | EVAP Data--Contains information specific to the Evaporative Emission (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 |
24X Crank Sensor | Engine 2 | RPM | 0-1,600 |
A/C High Side Pressure Sensor | Engine 2 | PSI/Volts | Varies with refrigerant temperature |
A/C OFF for WOT | Engine 2 | Yes/No | No |
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 |
Crank Request Signal | Engine 2 | Yes/No | No |
Cruise Control Active | Engine 1 | Yes/No | No |
Cruise Inhibit Reason | Engine 1 | ABS, ALDL, Brake, B+ Volts, Clutch Switch, CC Cancel SW, CC Inhibit Ckt., Delta Vehicle Sp, Eng Not Running, Engine Speed, Injector, Low Spd 96A, Man. Neutral CC, mpg Limit, None, P0751, P0753, P0756, P0758, P0785, Park Brake Act., Serial Comm, SMCC Fault, TCS, Trans., Veh Spd Fault, Veh Spd, Brake | Varies |
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 | # | 1-99 |
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%/0.0 Volts |
Desired Idle Speed | Engine 1, Engine 2, EVAP | RPM | Within 50 RPM of actual engine speed at idle |
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%/0.0 Volts |
EGR Position Variance | EGR | % | 0%-100% |
EGR Solenoid Command | EGR | % | 0%-100% |
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 | % | 0%-100% |
Engine Oil Pressure Switch | Engine 2 | OK/Not OK | OK |
Engine Run Time | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, Misfire | Hr:min:sec | -- |
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/Week Vacuum | No Fault |
EVAP Purge Solenoid Circuit Status | Output Driver | Fault/OK | OK |
EVAP Purge Solenoid Command | Engine 1, EVAP, Fuel Trim | % | 19% |
EVAP Vent Solenoid Circuit Status | Output Driver | Fault/OK | OK |
EVAP Vent Solenoid Command | Engine 1, EVAP, Fuel Trim | 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 | -- |
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 | % | -- |
Fuel Tank Pressure Sensor | Engine 1, EVAP | in H2O, mmHg, Volts | Varies |
Fuel Trim Cell | Engine 1, EVAP, Fuel Trim | Cell # | -27% to +27% |
Fuel Trim Learn | Engine 1, EVAP, Fuel Trim | Enabled/Disabled | Enabled |
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 | -39°C to +140°C |
Ignition 1 Signal | Engine 1, Engine 2, EGR, EVAP, Fuel Trim, | Volts | 12.8 Volts |
Ignition Mode | Engine 2 | Bypass/IC | IC |
IMS | Engine 1 | Park thru D1 | Park |
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, | % | -27% to +27% |
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/1.35 Volts |
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, | % | -27% to +27% |
Spark | Engine 1, Engine 2, Fuel Trim, Misfire, | Degrees | 18 |
Start Up ECT | Engine 2, EVAP, Fuel Trim | °C/°F | -38 to +139°C |
Start Up IAT | Engine 2, EVAP, Fuel Trim | °C/°F | -38°C to +139°C |
Starter Enable Relay Circuit Status | Output Driver | Fault/OK | OK |
Starter Relay Command | Engine 2 | On/Off | Off |
TCC Brake Pedal Switch | Engine 1, Engine 2 | Applied/Released | Released |
TCC PWM Solenoid Command | Engine 2, Misfire | On/Off | Off |
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, | Km/h/mph | 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 |
