Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Scan Tool Data List
The Engine Scan Tool Data List contains all of the engine related parameters that are available on the scan tool. The list is arranged in alphabetical order.
Use the Engine Scan Tool Data List only after verifying the following:
- The Diagnostic System Check-Engine Controls is completed.
- No diagnostic trouble codes (DTCs) are present.
- 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 Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Engine Idling/Upper Radiator Hose Hot/Closed Throttle/Transmission in Park or Neutral/Closed Loop | |||
| AC Clutch | Engine Data | On/Off | Off |
| AC Request Signal | Engine Data | Yes/No | No |
| Auxiliary Intake Air Control Solenoid | Engine Data | On/Off | On |
| Cam Phase Angle Actual | Camshaft Phase Data | Degrees | 0° |
| Cam Phase Angle Desired | Camshaft Phase Data | Degrees | 0° |
| Cam Phase Angle Variance | Camshaft Phase Data | Degrees | 0° |
| Camshaft Phase Solenoid DC | Camshaft Phase Data | Percent | 35-45% |
| Camshaft Phase Solenoid Command | Engine Data | Active/Inactive | Active |
| Decel Fuel Cutoff | Engine Data | Active/Inactive | Inactive |
| Diagnostic Mode | Engine Data | Normal/Check | Normal |
| ECT Sensor | Engine Data | °C (°F) | 80-90°C (176-194°F) |
| Engine Load | Engine Data | Percent | 9-20% |
| Engine Speed | Engine Data | RPM | 750-850 RPM with M/T |
| Engine Speed at Misfire | Misfire Data | RPM | 0 RPM |
| EVAP Purge Solenoid | EVAP Data | On/Off | Off |
| Fuel Pump Relay Command | Engine Data | On/Off | On |
| Fuel Tank Pressure Sensor | EVAP Data | mm Hg/in H2O | Varies |
| High Electrical Load | Engine Data | Yes/No | No |
| HO2S 1 | Engine Data | mV | Varies |
| HO2S 1 L/R Response Time | Engine Data | ms | 0-1000 ms |
| HO2S 1 R/L Response Time | Engine Data | ms | 0-1000 ms |
| HO2S 2 | Engine Data | mV | Varies |
| IAC Motor Command | Engine Data | Percent | 27-47% |
| IAT Sensor | Engine Data | °C (°F) | Varies with underhood and ambient air temperatures |
| Ign. Cycle Counter | Engine Data | Counts | 0-400 Counts |
| Injector 1 Command | Engine Data | ms | 1.10-2.20 ms |
| Load at Misfire | Misfire Data | G/Rev | 0.00 G/Rev |
| Long Term FT | Engine Data | Percent | -20% to +20% |
| Loop Status | Engine Data | Open/Closed | Closed |
| MAF Sensor | Engine Data | g/s | 1.50-5.00 g/s |
| MIL Command | Engine Data | On/Off | Off |
| Misfire Current Cyl #1 | Misfire Data | Counts | 0 |
| Misfire Current Cyl #2 | Misfire Data | Counts | 0 |
| Misfire Current Cyl #3 | Misfire Data | Counts | 0 |
| Misfire Current Cyl #4 | Misfire Data | Counts | 0 |
| Number of DTC(s) | Engine Data | Varies | 0 |
| Power Steering Switch | Engine Data | Normal/High Pressure | Normal, with steering straight ahead |
| Secondary Air Injection (AIR) Pump | Engine Data | On/Off | Off |
| Secondary Air Injection (AIR) Solenoid | Engine Data | On/Off | Off |
| Short Term FT | Engine Data | Percent | -20% to +20% |
| Spark | Engine Data | Degrees | 4-14° |
| Starter Switch | Engine Data | Released/Cranking | Released |
| Total Fuel Trim Average | Engine Data | Counts | 0.25-0.75 (varies) |
| Total Misfire Current Count | Misfire Data | Counts | 0 |
| TP Sensor | Engine Data | Percent | 8-13% |
| Vehicle Speed Sensor | Engine Data | km/h/mph | 0 km/h / 0 mph |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.