Engine Scan Tool Data List 5.0L
| Table 1: | Engine Data 1 |
| Table 2: | Engine Data 2 |
| Table 3: | Engine Data 3 |
| Table 4: | HO2S Data |
| Table 5: | Misfire Data 5.0L/5.7L/7.4L |
Use the scan tool data listed in this table for comparison after the On-Board Diagnostic system check and finding the on-board diagnostics function properly with no diagnostic codes displayed.
The Typical Scan Tool Data Values are an average of display values recorded from normally operating vehicles. The Typical Scan Tool Data Values are intended to represent what a normally functioning system would display. The values you get may vary due to a low battery charge or other reasons. But they should be very close.
Do not use a scan tool that displays faulty data. Report the problem to the manufacturer. The use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Use only the parameters listed in the tables for diagnosis. If a scan tool reads other parameters, the values are not recommended by General Motors for use in diagnosis. For more description on the values and the use of the scan tool diagnosis the VCM inputs, refer to the applicable diagnosis. If all values are within the range illustrated, refer to Driveability Symptoms.
Engine at Operating Temperature/Engine Idling in Closed Loop/ Closed Throttle/ Park or Neutral/ Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 650 RPM |
Desired Idle | RPM | 652 RPM |
Startup ECT | °C(°F) | Varies |
ECT | °C(°F) | 93°C (200°F) |
ECT Sensor | Volts | 2.00 Volts |
Startup IAT | °C(°F) | Varies |
IAT | °C(°F) | 43°C (109°F) |
IAT Sensor | Volts | 1.46 Volts |
Air to Fuel Ratio | Ratio | 14.7:1 |
IAC Position | Counts | 18 |
Desired IAC | Counts | 18 |
TP Sensor | Volts | 0.44-0.68 Volts |
TP Angle | % | 0% |
MAP | kPa | 38 kPa |
MAP Sensor | Volts | 1.46 Volts |
BARO | kPa | 101 kPa |
BARO Sensor | Volts | 4.76 Volts |
Ignition 1 | Volts | Varies |
Engine Speed | RPM | 650 RPM |
Long Term FT Bn 1 | %/Counts | 0%/126 |
Long Term FT Bn 2 | %/Counts | 0%/126 |
Short Term FT Bn 1 | %/Counts | 0%/0.0 |
Short Term FT Bn 2 | %/Counts | 0%/0.0 |
Fuel Trim Cell Bn 1 | Counts | 17 |
Fuel Trim Cell Bn 2 | Counts | 17 |
KS Activity | Counts | 130 Counts |
Knock Sensor | Volts | 4.8 volts |
Spark Advance | Degrees | 21° |
Knock Retard | Degrees | 0°±2° |
CMP Retard | Degrees | 0°±2° |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temperature/ Engine Idling in Closed Loop/ Closed Throttle/ Park or Neutral/ Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 650 RPM |
Desired Idle | RPM | 652 RPM |
EVAP Duty Cycle | % | 0% |
EVAP Canister Purge | On/Off | Off |
Air Fuel Ratio | Ratio | 14.7:1 |
EGR Duty Cycle | % | 0% |
Actual EGR Position | % | 0% |
Desired EGR Position | % | 0.0% |
EGR Sensor | Volts | 0.82 Volts |
Air Fuel Ratio | Ratio | 14.7:1 |
Ignition 1 | Volts | Varies |
IAC Position | Counts | 18 |
Desired IAC | Counts | 18 |
ECT | °C(°F) | 93°C (200°F) |
Startup ECT | °C(°F) | Varies |
IAT | °C(°F) | 43°C (109°F) |
CMP Retard | Degrees | 0°±2° |
Spark Control | Advance/Retard | Varies |
Power Enrichment | Yes/No | No |
Brake Switch | Open/Closed | Open |
TR Switch | Current Gear | P/N |
A/B/C Range Switch | On/Off | On/On/On |
Vehicle Speed | MPH(Km/h) | 0 MPH (0 Km/h) |
Decel Fuel Mode | Yes/No | No |
1-2 Sol. | On/Off | Off |
2-3 Sol. | On/Off | Off |
3-2 Downshift Sol. | Yes/No | No |
Cruise Mode | Yes/No | No |
TCC Enable | Yes/No | No |
TCC Duty Cycle | % | 0% |
TCC Slip Speed | RPM | 0 RPM |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temperature/ Engine Idling in Closed Loop/ Closed Throttle/ Park or Neutral/ Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 650 RPM |
Desired Idle | RPM | 652 RPM |
IAC Position | Counts | 18 |
Desired IAC | Counts | 18 |
Inj. PWM Average Bank 1 | ms | 3.5 ms |
Inj. PWM Average Bank 2 | ms | 3.5 ms |
Engine Load | % | 5% |
MAF Frequency | Hz | 2285 Hz |
MAF Sensor | g/s | 5-7 g/s |
TP Sensor | Volts | 0.44-0.68 Volts |
TP Angle | % | 0% |
MAP | kPa | 38 kPa |
MAP Sensor | Volts | 1.46 Volts |
BARO | kPa | 101 kPa |
BARO Sensor | Volts | 4.76 Volts |
EVAP Duty Cycle | % | 0% |
EGR Duty Cycle | % | 0% |
Actual EGR Position | % | 0% |
Desired EGR Position | % | 0.0% |
EGR Sensor | Volts | 0.82 Volts |
CMP Retard | Degrees | 0°±2° |
A/C Request | Yes/No | No |
A/C Relay | On/Off | Off |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Accessories OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 652 RPM |
Pre HO2S | Not Ready/Ready | Ready |
Post HO2S | Not Ready/Ready | Ready |
HO2S Bank 1 Sensor 1 | mV | Varies |
HO2S Bank 1 Sensor 2 | mV | Varies |
HO2S Bank 2 Sensor 1 | mV | Varies |
HO2S Bank 1 Sensor 3 | mV | Varies |
Air Fuel Ratio | Ratio | 14.7:1 |
HO2S XCounts Bank 1 | Counts | Varies |
HO2S XCounts Bank 2 | Counts | Varies |
Rich/Lean Bank 1 | Rich/Lean | Varies |
Rich/Lean Bank 2 | Rich/Lean | Varies |
Loop Status | Closed/Open | Closed |
CL Since Restart | No/Yes | Yes |
IAC Position | Counts | 36 Counts |
Desired IAC | Counts | 36 Counts |
MAF | g/s | 4.5 g/s |
Long Term FT Bank 1 | %/Counts | 0%/127 Counts |
Long Term FT Bank 2 | %/Counts | 0%/123 Counts |
Short Term FT Bank 1 | %/Counts | 0%/128 Counts |
Short Term FT Bank 2 | %/Counts | 0%/128 Counts |
Long Term Fuel Trim | Disabled/Enabled | Enabled |
Fuel Trim Cell Bank 1 | Cell | Cell 17 |
Fuel Trim Cell Bank 2 | Cell | Cell 17 |
ECT | °C(°F) | 93°C (200°F) |
Startup ECT | °C(°F) | Varies |
Ignition 1 | Volts | 13.6 Volts |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Accessories OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Misfire Current Cyl. #1 | Number of Misfires | 0 |
Misfire Current Cyl. #2 | Number of Misfires | 0 |
Misfire Current Cyl. #3 | Number of Misfires | 0 |
Misfire Current Cyl. #4 | Number of Misfires | 0 |
Misfire Current Cyl. #5 | Number of Misfires | 0 |
Misfire Current Cyl. #6 | Number of Misfires | 0 |
Misfire Current Cyl. #7 | Number of Misfires | 0 |
Misfire Current Cyl. #8 | Number of Misfires | 0 |
Engine Speed | RPM | 600 RPM |
Misfire History Cyl. #1 | Number of Misfires | 0 |
Misfire History Cyl. #2 | Number of Misfires | 0 |
Misfire History Cyl. #3 | Number of Misfires | 0 |
Misfire History Cyl. #4 | Number of Misfires | 0 |
Misfire History Cyl. #5 | Number of Misfires | 0 |
Misfire History Cyl. #6 | Number of Misfires | 0 |
Misfire History Cyl. #7 | Number of Misfires | 0 |
Misfire History Cyl. #8 | Number of Misfires | 0 |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 652 RPM |
Cycles of Misfire Data | Number of Cycles | Varies |
Misfire Per Cycle Status | Counts | Varies |
Rich/Lean Bank 1 | Rich/Lean | Varies |
Rich/Lean Bank 2 | Rich/Lean | Varies |
IAC Position | Counts | 36 Counts |
Desired IAC | Counts | 36 Counts |
FT Enable | Off/On | On |
Ignition 1 On | No/Yes | Yes |
Decel Fuel Mode | Inactive/Active | Inactive |
Brake Switch | Closed/Open | Closed |
TR Switch | Current Gear | P/N |
TCC Forced Off | No/Yes | Yes |
TCC Enable | No/Yes | No |
Engine Scan Tool Data List 5.7L/7.4L
| Table 1: | Engine Data 1 |
| Table 2: | Engine Data 2 |
| Table 3: | Engine Data 3 |
| Table 4: | HO2S Data |
| Table 5: | Misfire Data 5.0L/5.7L/7.4L |
Use the scan tool data listed in this table for comparison after the On-Board Diagnostic system check and finding the on-board diagnostics function properly with no diagnostic codes displayed.
The Typical Scan Tool Data Values are an average of display values recorded from normally operating vehicles. The Typical Scan Tool Data Values are intended to represent what a normally functioning system would display. The values you get may vary due to a low battery charge or other reasons. But they should be very close.
Do not use a scan tool that displays faulty data. Report the problem to the manufacturer. The use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Use only the parameters listed in the tables for diagnosis. If a scan tool reads other parameters, the values are not recommended by General Motors for use in diagnosis. For more description on the values and the use of the scan tool diagnosis the VCM inputs, refer to the applicable diagnosis. If all values are within the range illustrated, refer to Driveability Symptoms.
Engine at Operating Temperature/Engine Idling in Closed Loop/ Closed Throttle/ Park or Neutral/ Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 650 RPM |
Desired Idle | RPM | 652 RPM |
Startup ECT | °C(°F) | Varies |
ECT | °C(°F) | 93°C (200°F) |
ECT Sensor | Volts | 2.00 Volts |
Startup IAT | °C(°F) | Varies |
IAT | °C(°F) | 43°C (109°F) |
IAT Sensor | Volts | 1.46 Volts |
Air to Fuel Ratio | Ratio | 14.7:1 |
IAC Position | Counts | 18 |
Desired IAC | Counts | 18 |
TP Sensor | Volts | 0.44-0.68 Volts |
TP Angle | % | 0% |
MAP | kPa | 38 kPa |
MAP Sensor | Volts | 1.46 Volts |
BARO | kPa | 101 kPa |
BARO Sensor | Volts | 4.76 Volts |
Ignition 1 | Volts | Varies |
Engine Speed | RPM | 650 RPM |
Long Term FT Bn 1 | %/Counts | 0%/126 |
Long Term FT Bn 2 | %/Counts | 0%/126 |
Short Term FT Bn 1 | %/Counts | 0%/0.0 |
Short Term FT Bn 2 | %/Counts | 0%/0.0 |
Fuel Trim Cell Bn 1 | Counts | 17 |
Fuel Trim Cell Bn 2 | Counts | 17 |
KS Activity | Counts | 130 Counts |
Knock Sensor | Volts | 4.8 volts |
Spark Advance | Degrees | 21° |
Knock Retard | Degrees | 0°±2° |
CMP Retard | Degrees | 0°±2° |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temperature/ Engine Idling in Closed Loop/ Closed Throttle/ Park or Neutral/ Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 650 RPM |
Desired Idle | RPM | 652 RPM |
EVAP Duty Cycle | % | 0% |
EVAP Canister Purge | On/Off | Off |
EVAP Vacuum Switch | On/Off | Off |
EGR Duty Cycle | % | 0% |
Actual EGR Position | % | 0% |
Desired EGR Position | % | 0.0% |
EGR Sensor | Volts | 0.82 Volts |
Air/Fuel Ratio | Ratio | 14.7: 1 |
Ignition 1 | Volts | Varies |
IAC Position | Counts | 18 |
Desired IAC | Counts | 18 |
ECT | °C(°F) | 93°C (200°F) |
Startup ECT | °C(°F) | Varies |
IAT | °C(°F) | 43°C (109°F) |
CMP Retard | Degrees | 0°±2° |
Spark Control | Advance/Retard | Varies |
Power Enrichment | Yes/No | No |
Brake Switch | Open/Closed | Open |
TR Switch | Current Gear | P/N |
A/B/C Range Switch | On/Off | On/On/On |
Vehicle Speed | MPH (Km/h) | 0 MPH (0 Km/h) |
Decel Fuel Mode | Yes/No | No |
1-2 Sol. | On/Off | Off |
2-3 Sol. | On/Off | Off |
3-2 Downshift Sol. | Yes/No | No |
TCC Enable | Yes/No | No |
TCC Duty Cycle | % | 0% |
TCC Slip Speed | RPM | 0 RPM |
Cruise Mode | Yes/No | No |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temperature/ Engine Idling in Closed Loop/ Closed Throttle/ Park or Neutral/ Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 650 RPM |
Desired Idle | RPM | 652 RPM |
IAC Position | Counts | 18 |
Desired IAC | Counts | 18 |
Inj. PWM Average Bank 1 | ms | 3.5 ms |
Inj. PWM Average Bank 2 | ms | 3.5 ms |
Engine Load | % | 5% |
MAF Frequency | Hz | 2285 Hz |
MAF Sensor | g/s | 5-7 g/s |
TP Sensor | Volts | 0.44-0.68 Volts |
TP Angle | % | 0% |
MAP | kPa | 38 kPa |
MAP Sensor | Volts | 1.46 Volts |
BARO | kPa | 101 kPa |
BARO Sensor | Volts | 4.76 Volts |
EVAP Duty Cycle | % | 0% |
EGR Duty Cycle | % | 0% |
Actual EGR Position | % | 0% |
Desired EGR Position | % | 0.0% |
EGR Sensor | Volts | 0.82 Volts |
CMP Retard | Degrees | 0°±2° |
A/C Request | Yes/No | No |
A/C Relay | On/Off | Off |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Accessories OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 652 RPM |
Pre HO2S | Not Ready/Ready | Ready |
Post HO2S | Not Ready/Ready | Ready |
HO2S Bank 1 Sensor 1 | mV | Varies |
HO2S Bank 1 Sensor 2 | mV | Varies |
HO2S Bank 2 Sensor 1 | mV | Varies |
HO2S Bank 2 Sensor 2 | mV | Varies |
Loop Status | Closed/Open | Closed |
HO2S XCounts Bank 1 | Counts | Varies |
HO2S XCounts Bank 2 | Counts | Varies |
Rich/Lean Bank 1 | Rich/Lean | Varies |
Rich/Lean Bank 2 | Rich/Lean | Varies |
IAC Position | Counts | 36 Counts |
Desired IAC | Counts | 36 Counts |
ECT | °C(°F) | 93°C (200°F) |
Startup ECT | °C(°F) | Varies |
Engine Load | % | 5% |
Long Term FT Bank 1 | %/Counts | 0%/127 Counts |
Long Term FT Bank 2 | %/Counts | 0%/123 Counts |
Short Term FT Bank 1 | %/Counts | 0%/128 Counts |
Short Term FT Bank 2 | %/Counts | 0%/128 Counts |
Long Term Fuel Trim | Disabled/Enabled | Enabled |
Fuel Trim Cell Bank 1 | Cell | Cell 17 |
Fuel Trim Cell Bank 2 | Cell | Cell 17 |
MAF | g/s | 4.5 g/s |
IAT | °C(°F) | 43°C (109°F) |
Ignition 1 | Volts | 13.6 Volts |
Air Fuel Ratio | Ratio | 14.7:1 |
Spark Control | Advance/Retard | Varies |
Engine Run Time | Min/Sec | Varies |
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Accessories OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Misfire Current Cyl. #1 | Number of Misfires | 0 |
Misfire Current Cyl. #2 | Number of Misfires | 0 |
Misfire Current Cyl. #3 | Number of Misfires | 0 |
Misfire Current Cyl. #4 | Number of Misfires | 0 |
Misfire Current Cyl. #5 | Number of Misfires | 0 |
Misfire Current Cyl. #6 | Number of Misfires | 0 |
Misfire Current Cyl. #7 | Number of Misfires | 0 |
Misfire Current Cyl. #8 | Number of Misfires | 0 |
Engine Speed | RPM | 600 RPM |
Misfire History Cyl. #1 | Number of Misfires | 0 |
Misfire History Cyl. #2 | Number of Misfires | 0 |
Misfire History Cyl. #3 | Number of Misfires | 0 |
Misfire History Cyl. #4 | Number of Misfires | 0 |
Misfire History Cyl. #5 | Number of Misfires | 0 |
Misfire History Cyl. #6 | Number of Misfires | 0 |
Misfire History Cyl. #7 | Number of Misfires | 0 |
Misfire History Cyl. #8 | Number of Misfires | 0 |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 652 RPM |
Cycles of Misfire Data | Number of Cycles | Varies |
Misfire Per Cycle Status | Counts | Varies |
Rich/Lean Bank 1 | Rich/Lean | Varies |
Rich/Lean Bank 2 | Rich/Lean | Varies |
IAC Position | Counts | 36 Counts |
Desired IAC | Counts | 36 Counts |
FT Enable | Off/On | On |
Ignition 1 On | No/Yes | Yes |
Decel Fuel Mode | Inactive/Active | Inactive |
Brake Switch | Closed/Open | Closed |
TR Switch | Current Gear | P/N |
TCC Forced Off | No/Yes | Yes |
TCC Enable | No/Yes | No |
