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 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 section for diagnosis. 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 and basic engine operating conditions. |
| • | Engine Data 2 -- Contains general information regarding IC, KS, A/C, and basic engine operating conditions. |
| • | Catalyst Data -- Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation. |
| • | EGR Data -- Contains information specific to the Exhaust Gas Recirculation (EGR) system flow diagnostics and the EGR valve pintle position sensor diagnostics. Also 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. |
| • | HO2S Data -- Contains information specific to the heated oxygen sensor diagnostics and parameters required to verify proper HO2S operation. |
| • | Misfire Data -- Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire. |
For scan tool parameter definitions, refer to Diagnostic Trouble Code (DTC) Type Definitions .
Important: Use the Typical Scan Data Values only after the following conditions are met:
| • | The Powertrain On Board Diagnostic (OBD) System Check 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 |
|---|---|---|---|
A/C High Side Pressure | Engine 2 | Volts | Varies with refrigerant temperature |
A/C Pressure Out of Range | Engine 2 | Yes / No | No (Yes with low or high A/C refrigerant pressure) |
A/C Relay | Output Driver | Fault / OK | OK |
A/C Request | Engine 2 | Yes / No | No (Yes with A/C requested |
Actual EGR Position | Engine 1 Engine 2 EGR Misfire | Percent | 0% |
Air/Fuel Ratio | Engine 1 Catalyst HO2S A.I.R | Ratio | 14.2:1-14.7:1 |
A.I.R Active Test AIR Injection | A.I.R | Yes / No | Yes |
A.I.R Active Test Inhibit | A.I.R | Yes / No | No |
A.I.R Active Test Passed | A.I.R | Yes / No | Yes |
A.I.R Passive Test Inhibit | A.I.R | Yes / No | Yes |
A.I.R Passive Test in Progress | A.I.R | Yes / No | Yes |
A.I.R Passive Test 1 Passed | A.I.R | Yes / No | Yes |
A.I.R Passive Test 2 Fail | A.I.R | Yes / No | No |
A.I.R Passive Test Passed | A.I.R | Yes / No | Yes |
A.I.R Pump Relay | Engine 1 A.I.R | On / Off | Off |
A.I.R Pump Relay | Output Driver A.I.R | Fault / OK | OK |
A.I.R Solenoid | Engine 1 A.I.R | On / Off | Off |
A.I.R Solenoid | Output Driver A.I.R | Fault / OK | OK |
BARO | Engine 1 Engine 2 Catalyst EVAP EGR | kPa / Volts | 65 - 110 kPa (Depends on altitude and barometric pressure) |
Boost Solenoid | Engine 2 | Percent | 100% |
Brake Switch | Engine 1 | Engaged / Released | Released (Engaged with pedal depressed) |
Cam Signal Present | Misfire | Yes / No | Yes |
Change Oil Lamp | Engine 2 | % | Displays remaining oil life |
Change Oil Lamp | Output Driver | Fault / OK | OK |
Commanded A/C | Engine 2 Catalyst Misfire | On / Off | Off (On with A/C compressor engaged) |
Commanded GEN | Engine 1 | On / Off | On |
Commanded Starter | Engine 2 | Disabled / Enabled | Disabled |
Cruise | Engine 1 | Engaged / Disengaged | Disengaged |
Cruise Inhibit | Engine 1 | Yes / No | Yes |
Cruise Inhibit | Output Driver | Fault / OK | OK |
Cruise Inhibited Reason | Engine 1 | Reason | Vehicle Speed |
Current Gear | Engine 1 | 1 / 2 / 3 / 4 | 1 |
Cylinder # Injector CKT H / S | Output Driver | Fault / OK | OK |
Decel Fuel Mode | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive |
Desired EGR Position | Engine 1 Engine 2 EGR Misfire | Percent | 0% |
Desired Idle Speed | Engine 1 Engine 2 EGR | RPM | PCM commanded idle speed (varies with temperature) |
Driver Module 1 Status | Output Driver | Disabled / Enabled | Enabled |
Driver Module 2 Status | Output Driver | Disabled / Enabled | Enabled |
Driver Module 3 Status | Output Driver | Disabled / Enabled | Enabled |
Driver Module 4 Status | Output Driver | Disabled / Enabled | Enabled |
ECT | Engine 1 Engine 2 EGR EVAP Catalyst HO2S Misfire A.I.R | °C, °F | 85°C-105°C / 185°F-220°F (varies with temperature) |
EGR Closed Valve Pintle Position | EGR | Volts | 0.14-1.0 Volts |
EGR Duty Cycle | EGR | Percent | 0% |
EGR Feedback | EGR | Volts | 0.14-1.0 Volts |
EGR Flow Test Count | EGR | Counts | 0-10 |
EGR Position Error | EGR | Percent | 0%-9% |
Engine Hot Lamp | Engine 2 | On / Off | Off |
Engine Load | Engine 1 Engine 2 Catalyst Misfire A.I.R | Percent | Varies with Load |
Engine Oil Level | Engine 2 | OK / Low | OK |
Engine Oil Life | Engine 2 | Percent | 0%-100% (varies) |
Engine Oil Pressure | Engine 2 | OK / Low | OK |
Engine Run Time | Engine 1 Engine 2 Catalyst EVAP A.I.R | Hr: Min: Sec | Depends on time since startup |
Engine Speed | Engine 1 Engine 2 EGR EVAP HO2S Misfire | RPM | ± 100 RPM from Desired Idle Speed |
EVAP Canister Purge | EVAP HO2S A.I.R | Percent | 0% - 25% (varies) |
EVAP Fault History | EVAP | No Fault No Test Result Excess Vacuum Purge Valve Leak Small Leak Weak Vacuum | No Fault |
EVAP Purge Solenoid | Output Driver | Fault / OK | OK |
EVAP Vent Solenoid | EVAP | Open / Closed | Open |
EVAP Vent Solenoid | Output Driver | Fault / OK | OK |
Fan High Speed | Engine 2 Catalyst | On / Off | Off (On with fan running) |
Fan Low Speed | Engine 2 Catalyst | On / Off | Off (On with fan running) |
FC Relay 1 | Output Driver | Fault / OK | OK |
FC Relay 2 and 3 | Output Driver | Fault / OK | OK |
Fuel Level | EVAP | Percent | 0%-100% (varies) |
Fuel Pump | Engine 2 | On / Off | On |
Fuel Pump Speed | Engine 2 | Normal / High | Normal |
Fuel Pump CKT Status | Output Driver | Fault / OK | OK |
Fuel Pump CKT Hist. | Output Driver | Fault / OK | OK |
Fuel Pump Speed (VIN 1) | Engine 2 | Normal / High | Normal |
Fuel Tank Pressure | EVAP | mmHg / Volts | -0.33 / -0.53 mmHg 1.46 / 1.49 Volts |
Fuel Trim Cell | Engine 1 Misfire A.I.R | Cell # | 0 |
Fuel Trim Learn | Engine 1 Catalyst | Disabled / Enabled | Enabled |
Generator Lamp | Engine 2 | On / Off | Off |
Generator PWM | Engine 2 | Percent | Varies |
HO2S Sensor 1 | Engine 1 HO2S | Not Ready / Ready | Ready |
HO2S Sensor 1 | Engine 1 Catalyst HO2S A.I.R | Millivolts | 0-1000 constantly varying |
HO2S Sensor 2 | Engine 1 Catalyst HO2S | Millivolts | 0-1000 constantly varying |
HO2S XCounts | HO2S | Counts | Varies |
IAC Position | Engine 1 Engine 2 Catalyst EGR Misfire | Counts | 10-40 |
IAT | Engine 1 Engine 2 Catalyst EVAP HO2S A.I.R | °C, °F | Varies with ambient air temperature |
Ignition 1 | Engine 1 Engine 2 EGR HO2S A.I.R | Volts | 13 (varies) |
Ignition Mode | Engine 2 | IC / Bypass | IC |
Injector Pulse Width | Engine 1 Catalyst | Milliseconds | 1.5-3.5 (varies with engine load |
Knock Retard | Engine 2 | Degrees | 0 degrees |
Long Term FT | Engine 1 Misfire A.I.R | Percent | -10%-10% |
Loop Status | Engine 1 Catalyst HO2S Misfire A.I.R | Open / Closed | Closed |
Low Oil Lamp | Engine 2 | On / Off | Off |
MAF | Engine 1 Engine 2 Catalyst HO2S A.I.R | g/s | Varies (Depends on engine load and barometric pressure) |
MAF Frequency | Engine 1 | Hz | 1200-3000 (Depends on engine load and barometric pressure) |
MAP | Engine 1 Engine 2 EVAP EGR | kPa / Volts | 29-48 kpa / 1-2 volts (Depends on engine load and barometric pressure) |
MIL | Engine 2 | On / Off | Off |
MIL | Output Driver | Fault / OK | OK |
Misfire Current Cylinder # | Misfire | Counts | 0-4 |
Misfire History Cylinder # | Misfire | Counts | 0 |
Misfiring Cylinder (Primary / Secondary) | Misfire | 0-6 | 0 |
Power Enrichment | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive |
Rich/Lean Status | Engine 1 | Rich / Lean | Constantly changing |
Short Term FT | Engine 1 Catalyst Misfire A.I.R | Percent | -10%-10% |
Spark | Engine 2 | Degrees | 20° (Varies) |
Start Up ECT | EVAP HO2S A.I.R | °C, °F | Depends on engine coolant temperature at time of startup |
Start Up IAT | EVAP HO2S A.I.R | °C, °F | Depends on engine ambient temperature at time of startup |
TCC Solenoid | Output Driver | Fault / OK | OK |
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 Catalyst EGR EVAP HO2S Misfire A.I.R | Percent | 0% |
TP Sensor | Engine 1 | Volts | 0.20-0.74 |
Traction Control | Engine 2 | Active / Inactive | Inactive |
Traction Control Desired | Engine 2 | Percent | 100% |
Traction Control Torque | Engine 2 | Percent | 70%-80% (Varies with load) |
Transmission Range | Engine 2 | Park / Reverse / Neutral / Drive 4 / Driver 3 / Driver 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 EVAP Catalyst Misfire | mph / km/h | 0 |
VTD Fuel Disable | Engine 2 | Active / Inactive | Inactive |
1 - 2 Solenoid | Output Driver | Fault / OK | OK |
2 - 3 Solenoid | Output Driver | Fault / OK | OK |
3X Crank Sensor | Misfire | RPM | Varies with Engine Speed |
18X Crank Sensor | Misfire | RPM | Varies with Engine Speed |
