| Table 1: | Scan Tool Transmission Data 1 Value Examples |
| Table 2: | Scan Tool Transmission Data 2 Value Examples |
| Table 3: | Scan Tool Transmission Data 3 Value Examples |
If you have completed the On-Board Diagnostic (OBD) system check, if the diagnostics are functioning properly and if no DTCs display, you may use the Typical Scan Values in the table below for comparison within the appropriate transmission. These typical values are an average of display values recorded from normally operating vehicles. They represent the display from a normally functioning system.
You should never use a scan tool that displays faulty data. The condition should be reported to the manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.
Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.
Scan tests are performed under the following conditions:
| • | Idle |
| • | Upper radiator hose is hot |
| • | Closed throttle |
| • | Park or Neutral |
| • | Closed Loop |
| • | Accessories OFF |
| • | Brake not applied |
Tech 2 Parameter | Units Displayed | Typical Scan Values |
|---|---|---|
MAF | g/s | -8 g/s |
Spark | degrees | 13-16° |
Engine Load | % | 2-5% |
Outside Air Temperature | C°(F°) | varies |
MAP | kPa, V | 30-50 kPa, 1.5V @ 38 kPa |
BARO | kPa, V | 85-103 kPa, 4.75V @ 99 kPa |
IAT | C°(F°) | 0°-90°C (32°-194°F) |
Engine Speed | RPM | 675-775 RPM |
TP Sensor | V, degrees | 0.67V @ 2.5° |
Throttle Angle | % | 0% |
Ignition 1 | V | 12-14V |
Ignition 0 | V | 12-14V |
ECT | C°(F°) | 90°-110°C (194°-230°F) |
ECT Sensor | V | 1.25-1.95V |
Trans. Fluid Temp. | C°(F°) | 90°-110°C (194°-230°F) |
TFT Sensor | V | 1.25-1.75V |
A/C Relay | On/Off | Off |
Cruise | DISABLED/ENABLED | DISABLED |
Traction Control | Inactive/Active | Inactive |
Power Enrichment | Inactive/Active | Inactive |
Traction Control Torque | % | 5-8% |
Engine Run Time | 0:00:00 | varies |
Current Trans. DTC Set | 0 | 0 |
1-2 Sol. | On/Off | On |
2-3 Sol. | On/Off | Off |
TCC Brake Switch | Open/Closed | Closed |
TCC Enable | Yes/No | No |
TCC Duty Cycle | % | 0% |
Commanded TCC | psi (kPa) | 0 |
TCC Slip Speed | RPM | varies |
TCC Apply Time | S | 0 |
Hot Mode | On/Off | Off |
Trans. Oil Life | % | Varies |
Vehicle Speed | mph (km/h) | 0 |
Transmission ISS | RPM | 565-665 RPM |
Transmission OSS | RPM | 0 |
TR Switch A | High/Low | Low |
TR Switch B | High/Low | High |
TR Switch C | High/Low | High |
TR Switch P | High/Low | Low |
TFP Sw. A/B/C | On/Off | Off/On/Off |
Tech 2 Parameter | Units Displayed | Typical Scan Values |
|---|---|---|
MAF | g/s | 4-8 g/s |
MAP | kPa | 30-50 kPa |
TP Sensor | V, degrees | 0.67V @ 2.5° |
Throttle Angle | % | 0% |
Ignition 1 | V | 12-14V |
Ignition 0 | V | 12-14V |
PC Sol. Actual Current | amps | .99-1.04 amps |
PC Sol. Ref. Current | amps | .99-1.04 amps |
PC Sol. Current Error | amps | 0 amps |
PC Solenoid Duty Cycle | % | varies |
PC Pressure | psi (kPa) | varies |
Vehicle Speed | mph (km/h) | 0 |
Current Gear | 1, 2, 3, 4 | 1 |
1-2 Sol. | On/Off | On |
2-3 Sol. | On/Off | Off |
1-2 Shift Time | s | varies |
1-2 Shift Error | s | varies |
2-3 Shift Time | s | varies |
2-3 Shift Error | s | varies |
3-4 Shift Time | s | varies |
3-4 Shift Error | s | varies |
Latest Shift | s | varies |
Latest Shift Error | s | varies |
Shift Delay | s | varies |
4-3 Shift Time | s | varies |
3-2 Shift Time | s | varies |
2-1 Shift Time | s | varies |
Shift Torque | N·m (lb ft) | 0N·m (0 lb ft) |
Shift Time Pres. Error | psi (kPa) | 0 |
Throttle Angle at Shift | % | varies |
Shift RPM | RPM | varies |
Shift Pressure | psi (kPa) | varies |
1-2 WOT Desired | RPM | 0 |
Upshift | Yes/No | No |
Downshift in Progress | Yes/No | No |
Start of Shift | Yes/No | No |
Shift Completed | Yes/No | Yes |
Torque Management Spark | degrees | varies |
Gear ratio | 0.00 | 3.98 |
Gear Box Torque | N·m (lb ft) | 27-34 N·m (20-25 lb ft) |
Delivered Engine Torque | N·m (lb ft) | 27-34 N·m(20-25 lb ft) |
Tech 2 Parameter | Units Displayed | Typical Data Value |
|---|---|---|
Adaptable Shift | Yes/No | No |
Shift TAP | psi (kPa) | 0 |
Upshift | Yes/No | No |
Downshift in Progress | Yes/No | No |
Start of Shift | Yes/No | Yes |
Shift Completed | Yes/No | Yes |
Hot Mode | On/Off | Off |
Trans. Fluid Temp. | C° (F°) | 80-100°C (176-212°F) |
TFT Sensor | V | varies |
Garage Shift TAP | s | varies |
Garage Shift Adapt Rev. Low | s | varies |
Garage Shift Adapt Rev. High | s | varies |
Garage Shift Adapt Drive Low | s | varies |
Garage Shift Adapt Drive High | s | varies |
Steady State Mode | 0,1,2,3,4,7 | 1 |
Steady State Slip | RPM | 32 |
Steady State Accum | counts | 128 |
Steady State Tap | psi (kPa) | varies |
Steady State Tap Reverse | psi (kPa) | varies |
Steady State Tap 1GR | psi (kPa) | varies |
Steady State Tap 2GR | psi (kPa) | varies |
Steady State Tap 2GR/TCC | psi (kPa) | varies |
Steady State Tap 3GR | psi (kPa) | varies |
Steady St. Tap 3GR/TCC | psi (kPa) | varies |
Steady State Tap 4GR | psi (kPa) | varies |
Steady State Tap 4GR/TCC | psi (kPa) | varies |
Steady State TCC Speed | RPM | varies |
1-2 Tap Low Cell | psi (kPa) | varies |
1-2 Tap High Cell | psi (kPa) | varies |
2-3 Tap Low Cell | psi (kPa) | varies |
2-3 Tap High Cell | psi (kPa) | varies |
3-4 Tap Low Cell | psi (kPa) | varies |
3-4 Tap High Cell | psi (kPa) | varies |
Tap High Cell Delta Press. | psi (kPa) | varies |
1-2 WOT Desired | RPM | 6400 |
1-2 WOT Tap | mph (km/h) | 0 |
