Use the Typical Scan Data Values table only after the Powertrain On-Board Diagnostic 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 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 for diagnosis. The Typical Scan Data Values table contains all the parameters included in the following data lists arranged in alphabetical order:
Engine Idling, Fully Warmed-Up, Closed Loop, Transmission in Park or Neutral.
Engine Data
| • | ENG 1- Contains general information regarding fuel delivery and basic engine operating conditions. |
| • | ENG 2 - Contains general information regarding IC, KS, A/C, and basic engine operating conditions. |
Specific Engine Data
| • | EGR - Contains information specific to the Exhaust Gas Recirculation system flow diagnostics and the EGR valve pintle position sensor diagnostics. Also displays parameters required to verify proper EGR system operation. |
| • | EVAP - Contains information specific to the EVAP system diagnostics. Also displays parameters required to verify proper EVAP system operation. |
| • | CATALYST - Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation. |
| • | HO2S - Contains information specific to the Heated Oxygen Sensor diagnostics and parameters required to verify proper HO2S operation. |
| • | MISFIRE - Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire. |
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value | Reference |
|---|---|---|---|---|
A/C High Side Pressure | Engine 2 | Volts | Varies with refrigerant temperature | DTC P0530 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit |
A/C Press. Out Of Range | Engine 2 | Yes / No | No (Yes with low or high A/C refrigerant pressure) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis |
A/C Request | Engine 2 | Yes / No | No (Yes with A/C ON) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis |
Actual EGR Position | Engine 1 EGR Misfire | Percent | 0% | DTC P1404 Exhaust Gas Recirculation (EGR) Closed Position Performance |
Air/Fuel Ratio | Engine 1 HO2S | Ratio | 14.2:1 - 14.7:1 | |
BARO | Engine 1 Engine 2 EGR EVAP | kPa / Volts | 65 - 110 kPa (Depends on altitude and barometric pressure). | |
Boost Solenoid PWM | Engine 2 | Percent | 100% | |
Commanded A/C | Engine 2 | On / Off | Off (On with A/C compressor engaged) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis |
Commanded Fan 1/Commanded Fan 2 | Engine 2 | On / Off | Off (On with fans running) | |
Cam Signal Present | Misfire | Yes/No | Yes | |
Commanded Gen | Engine 1 | On / Off | On | |
Cruise | Engine 1 | Engaged / Disengaged | No | |
Cruise Inhibited | Engine 1 | Yes / No | Yes | |
Current Gear | Engine 1 | 1 / 2 / 3 / 4 | 1 | |
Decel Fuel Mode | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | |
Desired EGR Position | Engine 1 EGR Misfire | Percent | 0% | |
Desired Idle Speed | Engine 1 Engine 2 | RPM | PCM commanded idle speed (varies with temperature). | |
ECT | Engine 1 Engine 2 EGR EVAP Catalyst HO2S Misfire | °C, °F | 85°C - 105°C / 185°F - 220°F (varies with temperature). | DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage |
EGR Closed Val. Pintle Pos | EGR | Volts | 0.14-1.0 volt | |
EGR Duty Cycle | EGR | Percent | 0% | |
EGR Feedback | EGR | Volts | 0.14 - 1.0 volt | |
EGR Flow Test Count | EGR | Counts | 0 - 10 | |
EGR Position Error | EGR | Percent | 0% - 9% | DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance |
Engine Load | Engine 1 Engine 2 Catalyst Misfire | Percent | 2% - 5% at idle 7% - 10% at 2500 RPM | |
Engine Oil Level | Engine 2 | OK / Low | OK | |
Engine Oil Life | Engine 2 | Percent | 0%-100% (varies) | |
Engine Run Time | Engine 1 Engine 2 EVAP Catalyst | Hr: Min: Sec | Depends on time since startup. | -- |
Engine Speed | Engine 1 Engine 2 EVAP | RPM | ±100 RPM from Desired Idle | |
EVAP Canister Purge | EVAP HO2S | Percent | 0% - 25% (varies) | |
EVAP Fault History | EVAP | No Fault Excess Vacuum Purge Valve Leak Small Leak Weak Vacuum | No Fault | |
EVAP Vent Solenoid | EVAP | Open / Closed | Open | DTC P1665 Evaporative Emission (EVAP) Vent Solenoid Control Circuit |
Fuel Pump Speed | Engine Data 2 | Percent | Varies | |
Fuel Tank Pressure | EVAP | in. H2O / Volts | 0 in H2O 1.5 Volts | |
Fuel Level | EVAP | Percent | Varies with the amount of fuel | -- |
Fuel Pump | Engine 2 | On / Off | On | |
Fuel Pump Speed | Engine 2 | Normal / High | Normal | |
Fuel Trim Cell | Engine 1 | Cell # | 0 | |
Fuel Trim Learn | Engine 1 | Disabled / Enabled | Enabled | -- |
Generator PWM | Engine 2 | Percent | Varies | |
HO2S Sensor 1 | Engine 1 HO2S | Not Ready / Ready | Ready | |
HO2S Sensor 1 | Engine 1 HO2S Catalyst | millivolts | 0 - 1000, constantly varying | |
HO2S Sensor 2 | Engine 1 HO2S Catalyst | mIllivolts | 0 - 1000, constantly varying | |
HO2S Warm Up Sensor 1 / HO2S Warm Up Sensor 2 | HO2S | Min: Sec | Depends on startup intake air temperature, startup engine coolant temperature, and time to HO2S activity. | DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage |
HO2S X Counts | HO2S | Counts | Varies | -- |
IAC Position | Engine 1 Engine 2 EGR Catalyst Misfire | Counts | 10 - 40 | |
IAT | Engine 1 Engine 2 EVAP Catalyst HO2S | °C, °F | Varies with ambient air temperature. | DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage |
Ignition 1 | Engine 1 Engine 2 EGR HO2S | Volts | 13 (Varies) | |
Ignition Mode | Engine 2 | IC / Bypass | IC | |
Injector Pulse Width | Engine 1 | milliseconds | 1.5 - 3.5 (Varies with engine load) | -- |
Knock Retard | Engine 2 | Degrees | 0° | |
Long Term Fuel Trim | Engine 1 Misfire | Percent | -10% - 10% | DTC P0171 Fuel Trim System Lean DTC P0172 Fuel Trim System Rich |
Loop Status | Engine 1 Catalyst HO2S Misfire | Open / Closed | Closed | DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control |
Low Oil Lamp | Engine 2 | On / Off | Off | Powertrain Control Module Controlled Warning Lamps Diagnosis |
MAF | Engine 1 Engine 2 Catalyst HO2S | gm/s | 3 - 6 gm/s at idle 13 - 16 gm/s at 2500 RPM (Depends on engine load and barometric pressure) | |
MAF Frequency | Engine 1 | Hz | 1200 - 3000 (Depends on engine load and barometric pressure) | DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency |
MAP | Engine 1 Engine 2 EGR EVAP | kPa / Volts | 29 - 48 kPa / 1 - 2 Volts (Depends on engine load and barometric pressure). | DTC P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage |
MIL | Engine 2 | On / Off | Off | |
Misfire Current Cylinder # | Misfire | Counts | 0 - 4 | |
Misfire History Cylinder # | Misfire | Counts | 0 | |
Misfiring Cylinder | Misfire | 0 - 6 | 0 | |
Oil Life Reset | Engine 2 | Released / Pressed | Released | -- |
Power Enrichment | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | |
Rich/Lean Status | Engine 1 | Rich / Lean | Constantly changing | |
Short Term Fuel Trim | Engine 1 Misfire | Percent | -10% - 10% | DTC P0171 Fuel Trim System Lean DTC P0172 Fuel Trim System Rich |
Spark | Engine 2 | Degrees | -20° (varies) | |
Start Up ECT | EVAP HO2S | °C, °F | Depends on engine coolant temperature at time of startup | DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage |
Start Up IAT | EVAP HO2S | °C, °F | Depends on intake air temperature at time of startup | DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage |
Throttle at Idle | Engine 1 | Yes / No | Yes | -- |
Total Misfire Current Count | Misfire | Counts | 0 - 5 | |
Total Misfire Failures Since First Fail | Misfire | Counts | 0 | |
Total Misfire Passes Since First Fail | Misfire | Counts | 0 | |
TP Angle | Engine 1 Engine 2 EGR Catalyst HO2S Misfire | Percent | 0% | |
TP Sensor | Engine 1 | Volts | 0.20 - 0.74 | DTC P0123 Throttle Position (TP) Sensor Circuit High Voltage |
Traction Control | Engine 2 | Active / Inactive | Inactive | |
Traction Control Desired Torque | Engine 2 | Percent | 80% - 95% | |
Traction Control Torque | Engine 2 | Percent | 5% - 20% (Varies with load) | |
Transmission Range | Engine 2 | Park / Reverse / Neutral / Drive 4 / Drive 3 / Drive 2 / Low | Park | |
TR Switch P / A / B / C | Engine 2 | High / Low | Low / Low / High / High | |
TWC Protection | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | |
Vehicle Speed | Engine 1 Engine 2 EGR Catalyst Misfire | MPH, Km/h | 0 | |
VTD Fuel Disable | Engine 2 | Active / Inactive | Inactive | |
3X Crank Sensor | Misfire | RPM | Varies | |
18X Crank Sensor | Misfire | RPM | Varies |
