Use the Scan Tool Data List under the following conditions:
| • | The Diagnostic System Check - Automatic Transmission has been completed. |
| • | The On-Board Diagnostics are functioning properly. |
| • | No DTCs are present. |
Important: Do not use a scan tool that displays faulty data. Report the condition to the scan tool 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 service manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.
Scan tool values below were recorded under the following conditions:
| • | Engine at idle |
| • | Upper radiator hose is hot |
| • | Closed throttle |
| • | Transmission in Park |
| • | Closed loop operation |
| • | Accessories OFF |
| • | Brake pedal not applied |
Scan Tool Parameter | Data List* | Units Displayed | Typical Data Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
APP Angle | F0, F1, F2, F3 | % | 0% | ||||||||||
Brake Switch | F0, F1 | Applied/Released | Released | ||||||||||
Desired Speed Ratio | F0, F1, F2 | Ratio | 0.36-0.40 | ||||||||||
ECT | F0, F1 | °C (°F) | 85-115°C (185-239°F) | ||||||||||
Engine Run Time | F0 | Hours:Minutes:Seconds | Varies | ||||||||||
Engine Speed | F0, F1, F2, F3 | RPM | 550-700 RPM | ||||||||||
Engine Torque | F0, F1 | N·m(lb ft) | 8-25 N·m (7-18 lb ft) | ||||||||||
Ignition Voltage | F0 | Volts | 12.0-14.7 Volts | ||||||||||
Line PC Sol. Actual Current | F0, F3 | Amps | 0.80-0.98 | ||||||||||
Line PC Sol. Duty Cycle | F0, F3 | % | 38-56 | ||||||||||
Line PC Sol. Ref. Current | F0, F3 | Amps | 0.80-0.98 | ||||||||||
Line Pressure Actual | F0, F3 | kPa (psi) | 480-750 kPa (70-109 psi) | ||||||||||
Line Pressure Commanded | F0, F3 | kPa (psi) | 900-1200 kPa (131-174 psi) | ||||||||||
Ratio Ctrl. Mtr. Actual | F0, F2 | Counts | 39-46 | ||||||||||
Ratio Ctrl. Mtr. CKT A1 Status | F0, F2 | OK, Open/Short to GND, Short to Volts | OK | ||||||||||
Ratio Ctrl. Mtr. CKT A2 Status | F0, F2 | OK, Open/Short to GND, Short to Volts | OK | ||||||||||
Ratio Ctrl. Mtr. CKT B1 Status | F0, F2 | OK, Open/Short to GND, Short to Volts | OK | ||||||||||
Ratio Ctrl. Mtr. CKT B2 Status | F0, F2 | OK, Open/Short to GND, Short to Volts | OK | ||||||||||
Ratio Ctrl. Mtr. Commanded | F0, F2 | Counts | 39-58 | ||||||||||
Ratio Ctrl. Mtr. Dither | F0, F2 | Active/Inactive | Active | ||||||||||
Sheave Ratio | F0, F1, F2, F3 | Ratio | 2.50-2.80 | ||||||||||
Shifter Inhibit | F0 | Normal/Low TFT | Normal | ||||||||||
Speed Ratio | F0, F1, F2 | Ratio | 0.00 | ||||||||||
TCC Enable Solenoid | F0, F1 | Disabled/Enabled | Disabled | ||||||||||
TCC PC Sol. Actual Current | F0, F1 | Amps | 0.20-0.25 | ||||||||||
TCC PC Sol. Duty Cycle | F0, F1 | % | 10-18% | ||||||||||
TCC PC Sol. Ref. Current | F0, F1 | Amps | 0.20-0.25 | ||||||||||
TCC Slip Speed | F0, F1 | RPM | 20-90 RPM | ||||||||||
TCC Tap Cell 1-5 | F4 | kPa (psi) | Varies | ||||||||||
TR Sw. | F0 | Park, Neutral, Reverse, Drive, Intermediate, Low | Park | ||||||||||
TR Sw. A/B/C/P | F0 | HI/LOW | HI/LOW/LOW/HI | ||||||||||
Trans. Component Slip | F0, F2 | RPM | 500-650 RPM | ||||||||||
Trans. Fluid Temp. | F0, F1, F3 | °C (°F) | 70-115°C (158-239°F) | ||||||||||
Transmission ISS | F0, F1, F2 | RPM | 500-650 RPM | ||||||||||
Transmission OSS | F0, F1, F2 | RPM | 0 RPM | ||||||||||
Vehicle Speed | F0, F1, F2 | km/h (mph) | 0 km/h (0 mph) | ||||||||||
*Data List Legend
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