| Table 1: | Engine 1 Data List |
| Table 2: | Engine 2 Data List |
| Table 3: | Engine 3 Data List |
| Table 4: | Engine 4 Data List |
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.
Scan Tool Data
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 600 RPM |
ECT | °C/°F | 93°C (200°F) |
Startup ECT | °C/°F | Varies |
ECT Sensor | Volts | 2.00 Volts (Varies) |
IAT Sensor | Volts | 1.96 Volts (Varies) |
IAT | °C/°F | 43°C (109°F) |
Air to Fuel Ratio | Ratio | 14.7:1 |
MAP Sensor | Volts | 1.46 Volts (Varies) |
BARO | Volts | 4.76 Volts (Varies) |
MAP | kPa | 38 kPa (Varies) |
BARO | kPa | 101 kPa (Varies) |
TP Sensor | Volts | 0.44-0.68 Volts |
TP Angle | % | 0% |
Long Term FT Bn 1 | %/Counts | 0%/128 |
Long Term FT Bn 2 | %/Counts | 0%/128 |
Short Term FT Bn 1 | %/Counts | 0%/128 |
Short Term FT Bn 2 | %/Counts | 0%/128 |
FT Cell Bn 1 | Counts | 17 |
FT Cell Bn 2 | Counts | 17 |
IAC Position | Counts | 8 |
Desired IAC | Counts | 8 |
KS Activity | Yes/No | No |
Knock Sensor | Volts | 4.8 volts |
Spark Advance | Degrees | 21° |
Knock Retard | Degrees | 0°±20° |
Cam Retard | Degrees | 0°-2° |
Engine Speed | RPM | 600 RPM |
Engine Load | % | 18%-18% at 2500 RPM |
MAF | g/s | 4-6 g/s-17 g/s at 2500 RPM |
DTC Counts | Counts | 0 |
Engine Run Time | Min/Sec | Varies |
Scan Tool Data
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 600 RPM |
IAC Position | Counts | 8 |
Desired IAC | Counts | 8 |
Front HO2S | Ready/Not Ready | Ready |
Rear HO2S | Ready/Not Ready | Ready |
HO2S Bn 1 Sen 1 | mV | 65-840 mV |
HO2S Bn 2 Sen 1 | mV | 130-870 mV |
HO2S Bn 1 Sen 2 | mV | 65-840 mV |
HO2S Bn 1 Sen 3 | mV | 130-870 mV |
HO2S X Counts Bn 1 | mV | Varies |
HO2S X Counts Bn 2 | mV | Varies |
Long Term FT Bn 1 | %/Counts | 0%/128 |
Long Term FT Bn 2 | %/Counts | 0%/128 |
Short Term FT Bn 1 | %/Counts | 0%/128 |
Short Term FT Bn 2 | %/Counts | 0%/128 |
FT Bn 1 | Counts | 17 |
FT Bn 2 | Counts | 17 |
Rich/Lean Bn 1 | Rich/Lean | Varies |
Rich/Lean Bn 2 | Rich/Lean | Varies |
Loop Status | Open/Closed | Closed |
CL Since Restart | Yes/No | Yes |
ECT | °C/°F | 2.0 volts (varies) |
Startup ECT | °C/°F | Varies |
Ignition 1 | Volts | 13.0 volts (varies) |
Air to Fuel Ratio | Ratio | 14.7: 1 |
MAF | g/s | 4-6 g/s-17 g/s at 2500 RPM |
Long Term FT | Disabled | 128 |
DTC Counter | Counts | 0 |
Engine Run Time | Min/Sec | Varies |
Scan Tool Data
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 600 RPM |
EVAP Duty Cycle | % | 0% |
Air to Fuel Ratio | Ratio | 14.7:1 |
EVAP Canister | On/Off | Off |
EVAP Vacuum Sw | On/Off | Off |
EGR Duty Cycle | % | 0% |
Actual EGR Pos | % | 0% |
Desired EGR Pos | % | 0.0% |
EGR Sensor | Volts | 0.76 volts (varies) |
IAC Position | Counts | 8 |
Desired IAC | Counts | 8 |
ECT | °C/°F | Varies |
Startup ECT | °C/°F | Varies |
Ignition 1 | Volts | 13 volts(varies |
IAT | °C/°F | Varies |
Trans. Range | Current Gear | P/N |
A/B/C/ Range | On/Off | On/Off/On |
Cruise Mode | Yes/No | No |
TCC Enable | Yes/No | No |
MPH Km/h | MPH Km/h | 0 MPH Km/h |
TCC Enable | Yes/No | No |
TCC Duty Cycle | % | 0% |
TCC Slip Speed | RPM | 400 RPM |
1/2 Sol 2/3 Sol | 0n/Off On/Off | Off Off |
3-2 Down Shift | Yes/No | Yes |
Brake Switch | Open/Closed | Closed |
Decel Fuel Mode | Yes/No | No |
Spark Control | Advance/Retard | Advance |
Cam Retard | Degrees | 0°±20° |
4WD | Yes/No | No |
4WD Low | Yes/No | No |
Ignition 1 On | Yes/No | Yes |
Ignition 1 Low | Yes/No | No |
Ignition 1 High | Yes/No | No |
Power Enrichment | Yes/No | No |
A/C Status | Yes/No | No |
A/C Request On | Yes/No | No |
A/C Relay | On/Off | Off |
A/C Engaged | Yes/No | No |
DTC Counter | Counts | 0 |
Engine Run Time | Min/Sec | Varies |
Scan Tool Data
Engine at Operating Temp/Engine Idling in Closed Loop/Closed Throttle/Park or Neutral/Acc. OFF | ||
|---|---|---|
Scan Position | Units Displayed | Typical Data Value |
Engine Speed | RPM | 600 RPM |
Desired Idle | RPM | 600 RPM |
IAC Position | Counts | 8 |
Desired IAC | Counts | 8 |
KS Adjust Factor | Degrees | 0° |
KS Activity | Yes/No | No |
Inj. Ave. Bn 1 | ms | 3.5 ms |
Inj. Ave. Bn 2 | ms | 3.5 ms |
Engine Load | % | 18% at idle-18% at 2500 RPM |
MAF | g/s | 4-6 g/s at idle - 17 g/s at 2500 RPM |
TP Sensor | Volts | 0.45-0.85 Volts |
TP Angle | % | 0% |
MAP Sensor | Volts | 1.39 Volts (Varies) |
BARO | Volts | 4.00 Volts (Varies) |
MAP | kPa | 33 kPa (Varies) |
BARO | kPa | 98 kPa (Varies) |
EVAP Duty Cycle | % | 0% |
EGR Duty Cycle | % | 0% |
Actual EGR Position | % | 0% |
Desired EGR Position | % | 0% |
EGR Sensor | Volts | 0.76 Volts (Varies) |
Cam Retard | Degrees | 0°±20° |
Spark Advance | Degrees | 21° |
Knock Retard | Degrees | 0° |
DTC Counter | Counts | 0 |
Engine Run Time | Min/Sec | Varies |
