The values below represent a typical display recorded from a properly functioning system.
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 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 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 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
TP Angle | F0, F1, F2 | percent | 0 | ||||||||
Brake Switch | F0, F1, F2 | Applied, Released | Released | ||||||||
Commanded Gear | F0, F1, F2, F3 | 1, 2, 3, 4, 5 | 1 | ||||||||
Cruise | F0 | Enabled, Disabled | Disabled | ||||||||
ECT | F0, F1, F2 | °C (°F) | 85-105°C (185-220°F) | ||||||||
Engine Run Time | F0, F2 | hours:minutes:seconds | Varies | ||||||||
Engine Speed | F0, F1, F2 | RPM | 660-680 | ||||||||
Engine Torque | F0, F1, F2 | N·m (lb ft) | 8-12 (6-9) | ||||||||
Gear Ratio | F0, F1, F2, F3 | Ratio | Varies | ||||||||
Ignition Voltage | F0, F2, F3 | Volts | 12.6-14.0 | ||||||||
Last 1-2 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 2-1 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 2-3 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 2-4 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 3-2 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 3-4 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 4-2 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 4-3 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 4-5 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Last 5-4 Shift Status | F2 | Good, Flare, Tie-Up, Short, Long, Inconclusive | Inconclusive, Good | ||||||||
Line PC Sol. Actual Current | F0, F3 | Amps | 0.96 | ||||||||
Line PC Sol. CKT Status | F0, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
Line PC Sol. Duty Cycle | F0, F2, F3 | percent | 56-57 | ||||||||
Line PC Sol. Ref. Current | F0, F3 | Amps | 0.96 | ||||||||
Shift PC Sol. Actual Current | F0, F3 | Amps | 0.29 | ||||||||
Shift PC Sol. CKT Status | F0, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
Shift PC Sol. Duty Cycle | F0, F2, F3 | percent | 19 | ||||||||
Shift PC Sol. Ref. Current | F0, F3 | Amps | 0.29 | ||||||||
Shift Solenoid 1 | F0, F2, F3 | On, Off | Off | ||||||||
Shift Solenoid 1 CKT Status | F0, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
Shift Solenoid 2 | F0, F2, F3 | On, Off | Off | ||||||||
Shift Solenoid 2 CKT Status | F0, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
Shift Solenoid 3 | F0, F2, F3 | On, Off | Off | ||||||||
Shift Solenoid 3 CKT Status | F0, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
Shift Solenoid 4 | F0, F1, F2, F3 | On, Off | Off | ||||||||
Shift Sol. 4 CKT Status | F0, F1, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
Shift Solenoid 5 | F0, F2, F3 | On, Off | Off | ||||||||
Shift Solenoid 5 CKT Status | F0, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
TCC PC Sol. Actual Current | F0, F1, F3 | Amps | 0.20 | ||||||||
TCC PC Sol. CKT Status | F0, F1, F3 | OK, Open/Short to Volts, Short to GND | OK | ||||||||
TCC PC Sol. Duty Cycle | F0, F1, F2, F3 | percent | 14 | ||||||||
TCC PC Sol. Ref. Current | F0, F1, F3 | Amps | 0.20 | ||||||||
TCC Slip Speed | F0, F1, F2 | RPM | 20-40 | ||||||||
TR Sw. | F0, F2 | Park, Reverse, Neutral, Drive, Intermediate, Low, Invalid | Park | ||||||||
TR Sw. A/B/C/P | F0, F2 | HI, LOW | HI LOW LOW HI | ||||||||
Trans. Fluid Temp. | F0, F1, F2 | °C (°F) | Varies | ||||||||
Trans. Oil Life | F0, F1 | percent | Varies | ||||||||
Trans. Protection Mode | F0, F1, F2, F3 | OFF, ON | OFF | ||||||||
Transmission Hot Mode | F0, F1, F2 | OFF, ON | OFF | ||||||||
Transmission ISS | F0, F1, F2 | RPM | 600-700 | ||||||||
Transmission OSS | F0, F1, F2 | RPM | 0 | ||||||||
Vehicle Speed | F0, F1, F2 | km/h (mph) | 0 | ||||||||
|
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 manual for diagnosis. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.
The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table.
Scan Tool Parameter | System State | Expected Value | Description |
---|---|---|---|
Engine Idling / Operating Temperature / Closed Throttle / Park or Neutral / Closed Loop / Accessories Off | |||
AT Output Speed (Automatic Transmission) | - | RPM | This parameter displays the output speed signal of the transmission output speed sensor in RPM. |
AT Turbine Speed (Automatic Transmission) | - | RPM | This parameter displays the Turbine speed signal of the transmission turbine speed sensor in RPM. |
Brake Switch | Off On | - | The scan tool displays On and Off. The scan tool displays Off when the ignition is ON and the brake pedal is not applied. |
Commanded Gear | 1st 2nd 3rd 4th Reverse Invalid | - | This parameter displays the current commanded state of the shift solenoid valves. |
Current Gear | 1st 2nd 3rd 4th Reverse Invalid | - | This parameter displays the current gear of the shift solenoid valves. |
Emergency Mode | Off On | - | This parameter displays the emergency mode. |
Engine Speed | - | RPM | This parameter displays the rotational speed of the engine expressed as revolutions per minute. |
Engine Torque | - | Nm | This parameter displays a calculated value based on engine load, throttle position, mass air flow, and other engine inputs. |
Ignition Voltage | - | Battery Voltage | The scan tool displays the voltage measured between the module’s battery positive voltage circuit and ground circuit. |
Program Mode | Economy Mode Power Mode Hold Mode Unknown | - | This parameter displays the Program Modes. |
Selector Position | 1 2 3 4 D (Driving) N (Neutral Gear) R (Reverse Gear) P (Park Gear) Z1 Z2 Z3 Z4 Unknown Error | - | This parameter displays the actual gear selected. |
Solenoid 1 Status | Off On | - | This parameter displays the commanded state of the Shift solenoids On or Off. |
Solenoid 2 Status | Off On | ||
Solenoid 3 Actual Current | mA | - | This parameter displays the Actual current flow of the solenoid valve circuit. The scan tool displays current flow in mAmps. |
Solenoid 4 Actual Current | mA | ||
Solenoid 5 Actual Current | mA | ||
Solenoid 6 Actual Current | mA | ||
Solenoid 3 Current | mA | - | This parameter displays the commanded reference current flow of the solenoid valve circuit. The scan tool displays current flow in mAmps. |
Solenoid 4 Current | mA | ||
Solenoid 5 Current | mA | ||
Solenoid 6 Current | mA | ||
TCC Slip RPM (Torque Converter Clutch) | - | RPM | This parameter displays the difference between transmission input speed and engine speed. |
TCC Status (Torque Converter Clutch) | Open Control Close | - | This parameter displays the commanded state of the torque converter clutch status. |
Throttle Position Sensor | - | 0 - 100% | This parameter displays the Throttle Position Sensor signal in percentage. |
Torque Reduction | - | Nm | This parameter displays the Torque Reduction status in Nm. |
'Transmission Fluid Temperature | - | °C | This parameter displays the input signal of the transmission fluid temperature sensor. |
Turbine Torque | - | Nm | This parameter displays the Turbine Torque in Nm. |
Vehicle Speed | - | km/h | This parameter displays the speed at which the vehicle is traveling. The scan tool displays vehicle speed as kilometers per hour (km/h), (miles per hour (MPH)). |