For 1990-2009 cars only
1-2 Shift Time: Range 0.00-6.38 seconds. This parameter is the actual time
of the last 1-2 shift. The time is measured from the start of the change in
the ratio until the end of the change in the ratio.
1-2 Sol.: Displays On/Off. This parameter indicates the status of the 1-2 Shift Solenoid Valve. When the automatic Transmission is in first or fourth gear, the scan tool should display On. When the transmission is in second or third gear, the scan tool should display Off.
1-2 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or short to ground exists in the 1-2 shift solenoid valve feedback signal to the PCM. The 1-2 shift solenoid valve must be commanded OFF for this parameter to work.
1-2 Sol. Short to Volts: Displays Yes or No. This parameter indicates whether a short to power exists in the 1-2 shift solenoid valve feedback signal to the PCM. The 1-2 shift solenoid valve must be commanded ON for this parameter to work.
2-3 Shift Time: Range 0.00-6.38 seconds. This parameter is the actual time of the last 2-3 shift. The time is measured from the start of the change in the ratio until the end of the change in the ratio.
2-3 Sol.: Displays On/Off. This parameter indicates the status of the 2-3 Shift Solenoid Valve. When the automatic Transmission is in first or second gear, the scan tool should display On. When the transmission is in third or fourth gear, the scan tool should display Off.
2-3 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or short to ground exists in the 2-3 shift solenoid valve feedback signal to the PCM. The 2-3 shift solenoid valve must be commanded OFF for this parameter to work.
2-3 Sol. Short to Volts: Displays Yes or No. This parameter indicates whether a short to power exists in the 2-3 shift solenoid valve feedback signal to the PCM. The 2-3 shift solenoid valve must be commanded ON for this parameter to work.
3-4 Shift Time: Range 0.00-6.38 seconds. This parameter is the actual time of the last 3-4 shift. The time is measured from the start of the change in the ratio until the end of the change in the ratio.
A/C Clutch: Displays On/Off. This parameter indicates the commanded state of the A/C control relay. The clutch should be engaged when On is displayed.
Adaptable Shift: Displays Yes/No. Yes indicates that the proper operating conditions were all within the proper operating range during the last shift, and the Shift Time was accurate. This shift information is then used through the adaptive function in order to update the adapt cells. No indicates that not all of the operating conditions were met in order to enable this function, and the adapt cells were not updated. Proper operating conditions include the TP Sensor Delta, Engine Torque, Vehicle Speed Delta, Engine Vacuum, Shift Delay and others.
Brake Switch: Displays Open/Closed. This parameter indicates the state of the brake switch circuit input. Open indicates a zero voltage input (the brake switch is open and the brake pedal is applied). Closed indicates a B+ voltage input (the brake switch is closed and the brake pedal is released).
Cruise: Displays Enabled/Disabled. This parameter indicates whether the PCM is allowing cruise operation. The PCM has the ability to disable cruise control under certain conditions.
Current Gear: Displays 1, 2, 3 or 4. This parameter indicates the current command state of the shift solenoid valves.
Engine Run Time: Range 0:00:00-18:12:15. This parameter is a measure in Hr:Min:Sec of how long the engine has been operating. When the ignition is cycled to OFF, the value is reset to zero.
Engine Speed: Range 0.00-8192 RPM. The PCM computes the engine speed from the fuel control reference input. This speed should remain close to the desired idle under various engine loads with the engine idling.
Engine Torque: Range 0-510 N·m. This display indicates the amount of torque that is delivered from the engine.
ECT: Range -40°C to 151°C (-40°F to 304°F). This parameter is the input signal of the Engine Coolant Temperature (ECT) sensor. Engine coolant temperature is high at 151°C (304°F) when the signal voltage is low (0 V). Engine coolant temperature is low at -40°C (-40°F) when the signal voltage is high (5 V).
Gear Ratio: Range 0.00 to 3.98:1. This parameter is the actual transmission gear ratio. The ratio is calculated from the A/T ISS and the A/T OSS sensors.
Hot Mode: Displays On/Off. This parameter monitors the transmission temperature. Off indicates that the transmission temperature has not exceeded 135°C (275°F). On indicates that the transmission temperature has exceeded 140°C (284°F).
Ignition Voltage: Range 0.0-15.0 V. This parameter represents the system voltage which is measured by the PCM at its ignition feed.
Intake Air Temperature (IAT): Range -40°C to 215°C (-40°F to 419°F). The changes in air temperature will cause a change in voltage across the sensor. The PCM calculates this voltage to air temperature as it enters the intake manifold. The IAT sensor is used by the PCM to adjust fuel delivery, ignition timing, line pressure and shift timing.
Last Shift Time: Range 0.00-6.38 seconds. This parameter is the actual shift time of the last upshift.
MAP: Range 11-105 kPa, 0-5.0 V. The Manifold Absolute Pressure (MAP) sensor measures the change in the intake manifold pressure which are the result of engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required.
PC Sol. Actual Current: Range 0.00-4.98 amps. This parameter is the actual current of the Pressure Control (PC) solenoid valve circuit at the PCM. A reading of 0.00 amps (no current is flowing) indicates an actual high line pressure. A reading of 1.18 amps (a high flow of current) indicates an actual low line pressure.
PC (Pressure Control) Solenoid Duty Cycle: Range 0-100%. This parameter is the commanded state of the Pressure Control (PC) solenoid valve, which is expressed as a percent of it's energized ON time. A reading of 0% indicates zero ON time (a non-energized commanded OFF state). A reading of 100% represents an energized commanded ON state.
PC Sol. Ref. Current: Range 0.00-4.98 amps. This parameter is the commanded (Reference) current of the Pressure Control (PC) solenoid valve circuit . A reading of 0.00 amps (no current is flowing) indicates a commanded high line pressure. A reading of 1.18 amps (a high flow of current) indicates a commanded low line pressure.
TCC Duty Cycle: Range 0-100%. This parameter is the commanded percentage of On time of the TCC solenoid valve. A reading of 100% represents an On (energized) commanded state. A reading of 0% represents a non-energized commanded Off state.
TCC (Torque Converter Clutch) Duty Cycle Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or short to ground exists in the TCC PWM solenoid valve feedback signal to the PCM. The TCC PWM solenoid valve must be commanded OFF for this parameter to work. The scan tool will display YES only while the TCC PWM solenoid valve is OFF. The display will pulsate.
TCC (Torque Converter Clutch) Duty Cycle Short to Volts: Displays Yes or No. This parameter indicates whether a short to power exists in the TCC PWM solenoid valve feedback signal to the PCM. The TCC PWM solenoid valve must be commanded ON for this parameter to work. The scan tool will display YES only while the TCC PWM solenoid valve is ON. The display will pulsate.
TCC Release Pressure: Displays Yes/No. This parameter monitors the normally closed TCC Release switch. When the TCC Release fluid pressure is present, then the switch is Open, indicating that the TCC is released. When the fluid pressure is not present, then the switch is Closed, indicating that the TCC is applied.
TCC Slip Speed: Range -4095 to +4095. This parameter displays the amount of slip in RPM between the engine and the transmission input shaft.
TFP Sw. A/B/C: Displays On/Off, On/Off, On/Off. These parameters are the three inputs from the Automatic Transmission Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.). Off represents a B+ voltage signal and On represents a 0 voltage signal.
TFT (Automatic Transmission Fluid Temperature) Sensor: Displays a range of 0.00-5.00 volts. This parameter shows the voltage drop across the TFT sensor circuit. The PCM applies 5 volts to the TFT sensor circuit. The sensor is a thermistor which changes internal resistance as the temperature changes. When the sensor is cold (the internal resistance is high), the PCM monitors a high signal voltage. The PCM interprets this voltage as a cold transmission. As the sensor warms (the internal resistance decreases), the voltage signal will decrease. The PCM interprets the lower voltage as a warm transmission.
TP Angle: Range 0-100%. The PCM computes Throttle Position (TP) angle from the input of the TP sensor voltage. The TP angle is automatically set to 0% at idle (TP voltage is below 0.90 volt) and reads 100% at WOT.
TP Sensor: Range 0-5.0 V. The Throttle Position (TP) sensor is used by the PCM in order to determine the amount of throttle demanded by the operator of the vehicle. The TP sensor reads between 0.36-0.96 volt at idle to above 4 volts at WOT.
Trans. Fluid Temp.: Range -40°C to 151°C (-40°F to 304°F). The PCM converts the resistance of the Transmission Fluid Temperature (TFT) sensor into degrees. Transmission temperature is used in order to determine Hot Mode TCC operation and to modify the commanded transmission pressure.
Transmission ISS: Range 0.00-8192 RPM. This parameter indicates the rotational speed of the Automatic Transmission Input (Shaft) Speed Sensor (Trans. ISS), which is expressed as revolutions per minute (RPM).
Transmission OSS: Range 0.00-8192 RPM. This parameter indicates the rotational speed of the Automatic Transmission Output (Shaft) Speed Sensor (Trans. OSS), which is expressed as revolutions per minute (RPM).
Vehicle Speed: Range 0.00-255 mph. This parameter is the input signal from the A/T OSS sensor.
1-2 Sol.: Displays On/Off. This parameter indicates the status of the 1-2 Shift Solenoid Valve. When the automatic Transmission is in first or fourth gear, the scan tool should display On. When the transmission is in second or third gear, the scan tool should display Off.
1-2 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or short to ground exists in the 1-2 shift solenoid valve feedback signal to the PCM. The 1-2 shift solenoid valve must be commanded OFF for this parameter to work.
1-2 Sol. Short to Volts: Displays Yes or No. This parameter indicates whether a short to power exists in the 1-2 shift solenoid valve feedback signal to the PCM. The 1-2 shift solenoid valve must be commanded ON for this parameter to work.
2-3 Shift Time: Range 0.00-6.38 seconds. This parameter is the actual time of the last 2-3 shift. The time is measured from the start of the change in the ratio until the end of the change in the ratio.
2-3 Sol.: Displays On/Off. This parameter indicates the status of the 2-3 Shift Solenoid Valve. When the automatic Transmission is in first or second gear, the scan tool should display On. When the transmission is in third or fourth gear, the scan tool should display Off.
2-3 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or short to ground exists in the 2-3 shift solenoid valve feedback signal to the PCM. The 2-3 shift solenoid valve must be commanded OFF for this parameter to work.
2-3 Sol. Short to Volts: Displays Yes or No. This parameter indicates whether a short to power exists in the 2-3 shift solenoid valve feedback signal to the PCM. The 2-3 shift solenoid valve must be commanded ON for this parameter to work.
3-4 Shift Time: Range 0.00-6.38 seconds. This parameter is the actual time of the last 3-4 shift. The time is measured from the start of the change in the ratio until the end of the change in the ratio.
A/C Clutch: Displays On/Off. This parameter indicates the commanded state of the A/C control relay. The clutch should be engaged when On is displayed.
Adaptable Shift: Displays Yes/No. Yes indicates that the proper operating conditions were all within the proper operating range during the last shift, and the Shift Time was accurate. This shift information is then used through the adaptive function in order to update the adapt cells. No indicates that not all of the operating conditions were met in order to enable this function, and the adapt cells were not updated. Proper operating conditions include the TP Sensor Delta, Engine Torque, Vehicle Speed Delta, Engine Vacuum, Shift Delay and others.
Brake Switch: Displays Open/Closed. This parameter indicates the state of the brake switch circuit input. Open indicates a zero voltage input (the brake switch is open and the brake pedal is applied). Closed indicates a B+ voltage input (the brake switch is closed and the brake pedal is released).
Cruise: Displays Enabled/Disabled. This parameter indicates whether the PCM is allowing cruise operation. The PCM has the ability to disable cruise control under certain conditions.
Current Gear: Displays 1, 2, 3 or 4. This parameter indicates the current command state of the shift solenoid valves.
Engine Run Time: Range 0:00:00-18:12:15. This parameter is a measure in Hr:Min:Sec of how long the engine has been operating. When the ignition is cycled to OFF, the value is reset to zero.
Engine Speed: Range 0.00-8192 RPM. The PCM computes the engine speed from the fuel control reference input. This speed should remain close to the desired idle under various engine loads with the engine idling.
Engine Torque: Range 0-510 N·m. This display indicates the amount of torque that is delivered from the engine.
ECT: Range -40°C to 151°C (-40°F to 304°F). This parameter is the input signal of the Engine Coolant Temperature (ECT) sensor. Engine coolant temperature is high at 151°C (304°F) when the signal voltage is low (0 V). Engine coolant temperature is low at -40°C (-40°F) when the signal voltage is high (5 V).
Gear Ratio: Range 0.00 to 3.98:1. This parameter is the actual transmission gear ratio. The ratio is calculated from the A/T ISS and the A/T OSS sensors.
Hot Mode: Displays On/Off. This parameter monitors the transmission temperature. Off indicates that the transmission temperature has not exceeded 135°C (275°F). On indicates that the transmission temperature has exceeded 140°C (284°F).
Ignition Voltage: Range 0.0-15.0 V. This parameter represents the system voltage which is measured by the PCM at its ignition feed.
Intake Air Temperature (IAT): Range -40°C to 215°C (-40°F to 419°F). The changes in air temperature will cause a change in voltage across the sensor. The PCM calculates this voltage to air temperature as it enters the intake manifold. The IAT sensor is used by the PCM to adjust fuel delivery, ignition timing, line pressure and shift timing.
Last Shift Time: Range 0.00-6.38 seconds. This parameter is the actual shift time of the last upshift.
MAP: Range 11-105 kPa, 0-5.0 V. The Manifold Absolute Pressure (MAP) sensor measures the change in the intake manifold pressure which are the result of engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required.
PC Sol. Actual Current: Range 0.00-4.98 amps. This parameter is the actual current of the Pressure Control (PC) solenoid valve circuit at the PCM. A reading of 0.00 amps (no current is flowing) indicates an actual high line pressure. A reading of 1.18 amps (a high flow of current) indicates an actual low line pressure.
PC (Pressure Control) Solenoid Duty Cycle: Range 0-100%. This parameter is the commanded state of the Pressure Control (PC) solenoid valve, which is expressed as a percent of it's energized ON time. A reading of 0% indicates zero ON time (a non-energized commanded OFF state). A reading of 100% represents an energized commanded ON state.
PC Sol. Ref. Current: Range 0.00-4.98 amps. This parameter is the commanded (Reference) current of the Pressure Control (PC) solenoid valve circuit . A reading of 0.00 amps (no current is flowing) indicates a commanded high line pressure. A reading of 1.18 amps (a high flow of current) indicates a commanded low line pressure.
TCC Duty Cycle: Range 0-100%. This parameter is the commanded percentage of On time of the TCC solenoid valve. A reading of 100% represents an On (energized) commanded state. A reading of 0% represents a non-energized commanded Off state.
TCC (Torque Converter Clutch) Duty Cycle Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or short to ground exists in the TCC PWM solenoid valve feedback signal to the PCM. The TCC PWM solenoid valve must be commanded OFF for this parameter to work. The scan tool will display YES only while the TCC PWM solenoid valve is OFF. The display will pulsate.
TCC (Torque Converter Clutch) Duty Cycle Short to Volts: Displays Yes or No. This parameter indicates whether a short to power exists in the TCC PWM solenoid valve feedback signal to the PCM. The TCC PWM solenoid valve must be commanded ON for this parameter to work. The scan tool will display YES only while the TCC PWM solenoid valve is ON. The display will pulsate.
TCC Release Pressure: Displays Yes/No. This parameter monitors the normally closed TCC Release switch. When the TCC Release fluid pressure is present, then the switch is Open, indicating that the TCC is released. When the fluid pressure is not present, then the switch is Closed, indicating that the TCC is applied.
TCC Slip Speed: Range -4095 to +4095. This parameter displays the amount of slip in RPM between the engine and the transmission input shaft.
TFP Sw. A/B/C: Displays On/Off, On/Off, On/Off. These parameters are the three inputs from the Automatic Transmission Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.). Off represents a B+ voltage signal and On represents a 0 voltage signal.
TFT (Automatic Transmission Fluid Temperature) Sensor: Displays a range of 0.00-5.00 volts. This parameter shows the voltage drop across the TFT sensor circuit. The PCM applies 5 volts to the TFT sensor circuit. The sensor is a thermistor which changes internal resistance as the temperature changes. When the sensor is cold (the internal resistance is high), the PCM monitors a high signal voltage. The PCM interprets this voltage as a cold transmission. As the sensor warms (the internal resistance decreases), the voltage signal will decrease. The PCM interprets the lower voltage as a warm transmission.
TP Angle: Range 0-100%. The PCM computes Throttle Position (TP) angle from the input of the TP sensor voltage. The TP angle is automatically set to 0% at idle (TP voltage is below 0.90 volt) and reads 100% at WOT.
TP Sensor: Range 0-5.0 V. The Throttle Position (TP) sensor is used by the PCM in order to determine the amount of throttle demanded by the operator of the vehicle. The TP sensor reads between 0.36-0.96 volt at idle to above 4 volts at WOT.
Trans. Fluid Temp.: Range -40°C to 151°C (-40°F to 304°F). The PCM converts the resistance of the Transmission Fluid Temperature (TFT) sensor into degrees. Transmission temperature is used in order to determine Hot Mode TCC operation and to modify the commanded transmission pressure.
Transmission ISS: Range 0.00-8192 RPM. This parameter indicates the rotational speed of the Automatic Transmission Input (Shaft) Speed Sensor (Trans. ISS), which is expressed as revolutions per minute (RPM).
Transmission OSS: Range 0.00-8192 RPM. This parameter indicates the rotational speed of the Automatic Transmission Output (Shaft) Speed Sensor (Trans. OSS), which is expressed as revolutions per minute (RPM).
Vehicle Speed: Range 0.00-255 mph. This parameter is the input signal from the A/T OSS sensor.
