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 in engine controls 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. |
| • | EVAP Data--Contains information specific to the evaporative emissions (EVAP) control system. Also displays parameters required to verify proper EVAP system operation. |
| • | O2S--Contains the information that is specific to the oxygen sensor (O2S 1) and the rear heated oxygen sensor (HO2S 2) diagnosis and the data that is required in order to verify the proper operation of the sensors. |
| • | 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 the Output Driver System. |
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 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 | 0-5.0 Volts |
A/C High Side Pressure | Engine 2 | kPa/psi | 0-3100 kPa/0-450 psi (varies with the refrigerant pressure) |
Another TWC Test Desired | O2S | Yes/No | No |
A/C Relay | Engine 2 Output Driver | OFF/ON | OFF (ON with the A/C requested) |
A/C Relay | Output Driver | OK/Fault/Invalid State | OK |
A/C Request | Engine 2 | Yes/No | No (Yes with A/C ON) |
Adaptive Knock Retard | Engine 1 | Degrees | 0 |
Air/Fuel Ratio | Engine 2 | Ratio | 14.6:1 (varies) |
BARO | Engine 1 Engine 2 EVAP Misfire O2S | kPa | 65-104 (varies with the altitude and barometric pressure). |
Base PWM Cyl. 1-4 | Misfire | mS | 1-4 varies |
Calc. Air Flow | Engine 1 O2S Misfire | g/s | Varies |
Calc. Convertor Temp. | O2S | °C-°F | Varies with the engine Load |
CKP Active Counter (7X Reference) | Engine 1 | 0-255 Counts | 0-255--Increments while cranking or running |
CMP Active Counter | Engine 1 | 0-255 Counts | 0-255--Increments while cranking or running |
CMP Resync Counter | Engine 1 | 0-255 Counts | 0 |
Cruise | Engine 2 | Enabled/Disable | Disable |
Cruise | Engine 2 | Engaged/Disengaged | Disengaged |
Current TWC Test Complete | O2S | Yes/No | Yes |
Desired Idle Speed | Engine 1 Engine 2 EVAP Misfire O2S | RPM | PCM commanded idle speed (varies with calibration). |
Driver Module 1 Status | Output Driver | Enable/OFF High Volts/OFF High Temp/Invalid State | Enabled |
Driver Module 2 Status | Output Driver | Enable/OFF High Volts/OFF High Temp/Invalid State | Enabled |
Engine Coolant Low | Engine 2 | OK/Low | OK (Low with low coolant level) |
ECT | Engine 1 Engine 2 EVAP Misfire O2S | °C-°F | 85°C-115°C/185°F-239°F (Varies with coolant temperature). |
Engine Load | Engine 1 Misfire | % | 11%-21% 16-29% at 2,500 RPM |
Engine Oil Pressure | Engine 2 | Low/OK | OK (Low with low oil pressure) |
Engine Run Time | Engine 1 Engine 2 EVAP Misfire O2S | Hr:Min:Sec | Depends on time since startup. |
Engine Speed | Engine 1 Engine 2 EVAP Misfire O2S | RPM | ±100 RPM from Desired Idle |
EVAP Canister Purge | Engine 1 EVAP | % | 0%-100% (varies) |
EVAP Purge Solenoid | Output Driver | OK/Fault/Invalid State | OK |
EVAP Vent Solenoid | EVAP | Open/Closed | Open |
EVAP Vent Solenoid | Output Driver | OK/Fault/Invalid State | OK |
Fuel Level | EVAP | % | 0-100% Depends on fuel level |
Fuel Pump Relay Command | Engine 1 | ON/OFF | ON |
FC Relay 1 | Engine 2 | ON/OFF | OFF (Varies with fan request) |
FC Relay 1 | Output Driver | OK/Fault/Invalid State | OK |
FC Relay 2 | Engine 2 | ON/OFF | OFF (Varies with fan request) |
Fuel Tank Pressure | EVAP | mmHg/in H2O | Depends on Pressure/Vacuum |
Fuel Tank Pressure | EVAP | Volts | Depends on Pressure/Vacuum |
Fuel Trim Cell | Engine 1 EVAP O2S | Cell number | 18-21 at idle (Varies with the air flow, RPM P/N and A/C |
Fuel Trim Index | O2S | % | 58-198 (varies -100%-100%) |
Generator L Terminal | Engine 1 | Active/Inactive | Inactive |
Generator PWM | Engine 1 | % | 0-100% (Varies) |
HO2S 2 | Engine 1 EVAP O2S | mV | 0-1000, constantly varying |
IAC Position | Engine 1 EVAP | Counts | 5-60 |
IAT | Engine 1 Engine 2 EVAP Misfire O2S | °C-°F | 10°-80°C (50°-176°F varies with under hood temperature) |
Ignition 1 | Engine 1 | Volts | 12.0-15.0 Volts (Varies) |
KS Noise Channel | Engine 1 | Volts | Increments when knock is present |
Knock Retard | Engine 1 | Degrees | 0° |
Lean/Rich Transition | O2S | 0-255 Counts | 0 |
Lean/Rich Average Time | O2S | mS | 0 |
Long Term FT | Engine 1 EVAP O2S | 0% +/- 10% | 58-198 (-100%- to 100% varies) |
Loop Status | Engine 1 EVAP | Open/Closed | Closed |
MAP | Engine 1 Engine 2 EVAP Misfire O2S | kPa | 25-48 kPa |
MAP | Engine 1 Engine 2 EVAP Misfire O2S | Volts | 1-3 volts (Varies with the vacuum and BARO pressure) |
MIL | Output Driver | OK/Fault/Invalid State | OK |
Misfire Current #1-#4 | Misfire | 0-255 Counts | 0 (increase with a misfire) |
Misfire History #1-#4 | Misfire | 0-255 Counts | 0 (increase with a misfire) |
Med. Resolution Resync Counter | Engine 1 | 0-255 Counts | 0 |
Med. Resolution Engine Sync. | Engine 1 | Yes/No | Yes |
Number of DTCs | Engine 1 EVAP Misfire O2S | Number | 0 |
Number of catalyst Mon. Test Completed | O2S | Number of samples | Varies |
O2S 1 | Engine 1 EVAP O2S | mV | 1-1000 and varying |
Power Enrichment | Engine 1 | Active/Inactive | Inactive |
Purge Learned Memory | EVAP | Counts | 1.00 |
Rich/Lean Transition | O2S | 0-255 Counts | 0 |
Rich/Lean Average Time | O2S | mS | 0 |
Short Term FT | Engine 1 EVAP O2S | % | 0% +/- 10% |
Spark | Engine 1 | Degrees | Varies |
TCC Brake Switch | Engine 2 | Open/Closed | Closed |
Total Misfire Current Counter | Misfire | 0-255 Counts | 0 (increase with a misfire) |
TP Angle | Engine 1 Engine 2 EVAP Misfire O2S | % | 0% (up to 100% at wide open throttle) |
TP Sensor | Engine 1 Engine 2 EVAP Misfire O2S | Volts | 0.200--0.900 volts (up to 5.0 volts at wide open throttle) |
Transmission Range | Engine 2 | Invalid/Low/Drive 2/Drive 3/Overdrive/Reverse/Park/Neutral | Park/Neutral (Auto trans only) |
TR Switch P A B C | Engine 2 | Low/High | Low/Low/High/High |
TWC Stage 1 Started | O2S | Yes/No | Yes |
TWC Stage 2 Started | O2S | Yes/No | Yes |
TWC System Related DTC is Set | O2S | Yes/No | No |
TWC Test Initialization Conditions Met | O2S | Yes/No | Yes |
TWC Test Enabled | O2S | Yes/No | No |
TWC Warmup Conditions Met | O2S | Yes/No | Yes |
Vacuum Calculated | Engine 2 | kPa/PSI | Varies with the engine Load |
Vehicle Speed | Engine 1 Engine 2 | Km/h/MPH | 0 |
