For 1990-2009 cars only
1-2 Shift Time: Displays 0.00-6.38 seconds. This parameter is the
actual time of the last 1-2 shift. The shift time is based on the gear
ratio change after the commanded 1-2 shift. This value is only
accurate if the adaptable shift parameter indicates Yes.
1-2 Shift Time Error: Displays a range of -6.38 to +6.38 seconds. This parameter is the difference between the desired 1-2 shift time and the actual 1-2 shift time. A positive number indicates the actual shift time was longer than the desired shift time. This value is only accurate if the Adaptable Shift parameter indicates Yes.
1-2 Solenoid: Displays ON or OFF. These parameters are the commanded status of the 1-2 shift solenoid valves. ON represents a commanded energized state (current is flowing through the solenoid). OFF represents a non-commanded state (current is not flowing through the solenoid).
1-2 Solenoid Open/Shorted to Ground: Displays Yes or No. This parameter indicates if an open or a short to ground exists in the feedback signal from the 1-2 shift solenoid valve to the PCM.
1-2 Solenoid Shorted to Volts: Displays Yes or No. This parameter indicates if a short to B+ exists in the feedback signal from the 1-2 shift solenoid valve to the PCM.
1-2 TAP Cell (4-16): Scan tool displays kPa or psi. This parameter displays the amount of pressure varied from a calibrated base line pressure for shifts. Each TAP cell is based on a calibrated shift torque value. Each TAP cell value is calculated from the last shift time. This cell pressure is used in addition to the calibrated base line pressure to adjust the apply of a clutch or band during the next shift.
2-3 Shift Time: Displays 0.00-6.38 seconds. This parameter is the actual time of the last 2-3 shift. The shift time is based on the gear ratio change after the commanded 2-3 shift. This value is only accurate if the adaptable shift parameter indicates Yes.
2-3 Shift Time Error: Displays a range of -6.38 to +6.38 seconds. This parameter is the difference between the desired 2-3 shift time and the actual 2-3 shift time. A positive number indicates the actual shift time was longer than the desired shift time. This value is only accurate if the Adaptable Shift parameter indicates Yes.
2-3 Solenoid: Displays ON or OFF. These parameters are the commanded status of the 2-3 shift solenoid valves. ON represents a commanded energized state (current is flowing through the solenoid). OFF represents a non-commanded state (current is not flowing through the solenoid).
2-3 Solenoid Open/Shorted to Ground: Displays Yes or No. This parameter indicates if an open or a short to ground exists in the feedback signal from the 2-3 shift solenoid valve to the PCM.
2-3 Solenoid Shorted to Volts: Displays Yes or No. This parameter indicates if a short to B+ exists in the feedback signal from the 2-3 shift solenoid valve to the PCM.
2-3 TAP Cell (4-16): Scan tool displays kPa or psi. This parameter displays the amount of pressure varied from a calibrated base line pressure for shifts. Each TAP cell is based on a calibrated shift torque value. Each TAP cell value is calculated from the last shift time. This cell pressure is used in addition to the calibrated base line pressure to adjust the apply of a clutch or band during the next shift.
3-4 Shift Time: Displays 0.00-6.38 seconds. This parameter is the actual time of the last 3-4 shift. The shift time is based on the gear ratio change after the commanded 3-4 shift. This value is only accurate if the adaptable shift parameter indicates Yes.
3-4 Shift Time Error: Displays a range of -6.38 to +6.38 seconds. This parameter is the difference between the desired 3-4 shift time and the actual 3-4 shift time. A positive number indicates the actual shift time was longer than the desired shift time. This value is only accurate if the Adaptable Shift parameter indicates Yes.
3-4 TAP Cell (4-16): Scan tool displays kPa or psi. This parameter displays the amount of pressure varied from a calibrated base line pressure for shifts. Each TAP cell is based on a calibrated shift torque value. Each TAP cell value is calculated from the last shift time. This cell pressure is used in addition to the calibrated base line pressure to adjust the apply of a clutch or band during the next shift.
4WD: Displays Enabled or Disabled. This parameter indicates whether the vehicle is currently in a four-wheel drive mode.
4WD Low: Displays Enabled or Disabled. This parameter is the signal state of the four-wheel drive low circuit. Enabled indicates a 0 voltage signal requesting 4WD low. Disabled indicates a B+ voltage signal which does not request 4WD low.
A/C Clutch: Displays ON or OFF. This represents the commanded state of the A/C clutch control relay. The clutch should be engaged whenever ON is displayed. The PCM compensates for the additional engine load that is accompanied with the A/C clutch engaged.
Adaptable Shift: The scan tool displays Yes or No. Yes indicates that the proper operating conditions (i.e. TP sensor, engine torque, vehicle speed data, engine vacuum, shift delay, etc.) 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 to update the adapt cells. No indicates that not all of the operating conditions were met in order to enable this function and that the adapt cells were not updated.
Cruise: Displays ENABLED or 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 commanded state of the shift solenoids.
Current TAP (Transmission Adaptive Pressure) Cell: Displays a torque based cell range of 0-16. This parameter indicates the current cell used for line pressure modification (adaptation).
Current TAP Memory: Displays a range of -110 to +110 kPa (-16 to +16 psi). This parameter is the amount of pressure that is added to base line pressure to adjust the holding effort of a clutch or a band, while shifting.
ECT (Engine Coolant Temperature): Displays -40°C to 151°C (-40°F to 304°F). This parameter is the input signal of the engine coolant temperature sensor. Engine coolant temperature is high when the signal voltage is low (0 volts), and engine coolant temperature is low when the signal voltage is high (5 volts).
Engine Run Time: Displays a range of 0:00:00-18:12:15 Hr/Min/Sec. This parameter measures how long the engine has been operating. When you turn the ignition switch OFF, the value resets to zero.
Engine Speed: Displays 0-8192 RPM. This parameter indicates the rotational speed of the engine expressed as revolutions per minute.
Engine Torque: Displays 0-9999 ft/lb. This parameter is a calculated value based on engine load, throttle position, mass air flow, and other engine and transmission inputs. This parameter is accurate to within 15 ft/lb of actual measured engine torque.
Gear Ratio: Displays a range of 0.00 to 8.00:1. This parameter is the actual gear ratio of the current commanded gear. In the current gear of R, D3, D2, and D1, it is calculated by dividing the input speed by the output speed. In the current gear of D4 with TCC lock up, the gear ratio is calculated by dividing the turbine speed by the output speed.
IAT (Intake Air Temperature): Displays a range of -40°C to 215°C (-40°F to 419°F). The IAT sensor is a thermistor used to monitor the temperature of the air entering the intake manifold. The PCM applies 5 volts to the sensor on a 5 volt reference circuit. When the air is cool, the resistance in the sensor is high. If the air is warm, the sensor resistance is low and the PCM senses a low voltage signal. The PCM converts the signal of the IAT sensor to degrees Celsius. Intake air temperature is used by the PCM to adjust fuel delivery and spark timing.
Ignition Voltage: Displays 0.0-25.5 volts. This parameter represents the system voltage measured by the PCM at the ignition feed.
Latest Shift: Displays 0.00-6.38 seconds. This parameter is the actual shift time of the last upshift. This value is only accurate if the adaptable shift parameter indicates YES.
Maximum Tap (Transmission Adaptive Pressure): Displays Yes or No. This parameter indicates when line pressure modification (adaptation) has reached its limit. Yes indicates the limit has been reached. No indicates the limit has not been reached.
PC (Pressure Control) Solenoid Act. (Actual) Current: Displays 0.00-1.1 amps. This parameter is the actual current of the pressure control solenoid circuit at the control module. Zero amp (no current flow) indicates an actual higher line pressure. A reading of 1.1 amp (high current flow) indicates an actual lower line pressure.
PC (Pressure Control) Solenoid Duty Cycle: Displays 0 percent-100 percent. This parameter is the commanded state of the pressure control solenoid expressed as a percentage of energized ON time. A reading of 0 percent indicates zero ON time (non energized), or no current flow. Approximately 60 percent at idle indicates maximum ON time (energized), or high current flow.
PC (Pressure Control) Solenoid Ref. (Reference) Current: Displays 0.00-1.1 amps. This parameter is the commanded current of the pressure control solenoid circuit at the control module. Zero amp (no current flow) indicates a commanded higher line pressure. A reading of 1.1 amp (high current flow) indicates a commanded lower line pressure.
Power Take-Off: Displays Yes or No. This parameter indicates when the Power Take Off (PTO) is engaged. PTO mode disables all transmission diagnostics.
Shift Torque: Displays a range of 0-510 (0-406 ft). This parameter is the torque value which is used in the commanded pressure calculation during shift. This parameter indicates the last shift torque.
Speed Ratio: The scan tool displays a range of 0.00:1-8.00:1. This parameter indicates engine speed divided by transmission output speed.
TCC Brake Switch (Gas Application): Displays Open or Closed. This parameter indicates the state of the TCC 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 not applied).
TCC Duty Cycle: Displays 0 percent-100 percent. This parameter is the commanded percentage of ON time of the TCC PWM solenoid. 90 percent represents an ON (energized) commanded state. 0 percent represents an OFF (non-energized) commanded state.
TCC Duty Cycle Open/Shorted to Ground: Displays Yes or No. This parameter indicates if an open or a short to ground exists in the feedback signal from the TCC PWM solenoid valve to the PCM.
TCC Duty Shorted to Voltage: Displays Yes or No. This parameter indicates if a short to B+ exists in the feedback signal from the TCC PWM solenoid valve to the PCM.
TCC Mode: Displays a range of 0 through 5. Zero (0), or Off Mode, indicates that the PCM commands the TCC OFF at a calibrated minimum throttle. The calibrated minimum throttle is different at low vehicle speeds than the throttle is at high vehicle speeds. Off Mode is also active when the transmission is in the wrong gear range, the engine or the transmission is cold, the brake input indicates that the brakes are ON, a downshift or upshift is initiated, the engine is at idle, the transmission is in Hot Mode or a misfire is detected. One (1), or release Mode, indicates that the PCM commands the release of the TCC. Two (2), or Apply Mode, indicates that the PCM commands the apply of the TCC. Apply pressure varies based on normal or performance operations, hot conditions or if the cruise control is active. Apply Mode is used under normal driving conditions. All apply pressure is dependent on throttle position and vehicle speed. The TCC applies with an average 65 percent duty cycle. Three (3), or Apply Enable Mode, indicates that enabling conditions are met for applying the TCC (enabling conditions include: vehicle speed, gear selection, transmission temperature, throttle angle, brake switch status, etc.). Four (4), or Locked Mode, indicates that the PCM commands full capacity of the TCC when the transmission is in fourth gear and the vehicle speed is greater than a calibrated value. When variable TCC apply pressure stops (apply mode), maximum TCC pressure is used. Five (5), or Coast Mode, indicates that the PCM commands apply of the TCC when the transmission is in fourth gear and the throttle, and vehicle speed, are not high enough to enable Apply Mode, but high enough to keep the TCC applied. When Coast Mode is active, TCC apply pressure is set to a predetermined amount.
TCC (Torque Converter Clutch) Slip Speed: Displays -4080 to +4079 RPM. This parameter is the difference between transmission input speed and engine speed. A negative value indicates that the engine speed is less than the input speed (deceleration). A positive value indicates that the engine speed is greater than the input speed (acceleration). A value of zero indicates that the engine speed is equal to the input speed (TCC is applied).
TFP Switch A/B/C: Displays HI/LOW, HI/LOW, HI/LOW. These parameters are the three inputs from the automatic transmission fluid pressure manual valve position switch Assembly. HI represents a 0 voltage signal. LOW represents a B+ voltage signal.
TFT (Transmission Fluid Temperature) Sensor: Displays 0.00-5.00 volts. When the transmission fluid is cold, the sensor resistance is high and the PCM senses a high signal voltage. As the transmission fluid temperature warms to normal operating temperature, the sensor resistance becomes less and the voltage decreases to about 1.5-2.0 volts.
TP (Throttle Position) Angle: Displays a range of 0 percent-100 percent. The TP angle is computed by the PCM from TP voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle (WOT).
TP (Throttle Position) Sensor (Gas): Scan tool displays a range of 0.00-5.00 volts. The PCM uses the TP sensor in order to determine the amount of throttle demanded by the driver. Voltage is below 1 volt at idle. Voltage is above 4 volts at wide open throttle (WOT).
Tow/Haul Mode: Displays Yes or No. This parameter indicates when the transmission is operating in a Tow/Haul mode. In Tow/Haul mode, the PCM commands a different shift pattern that increases performance when towing and hauling. Shift quality and TCC scheduling are also affected during Tow/Haul mode operation.
Transfer Case Ratio: The scan tool displays a range of 0.00-3.88:1. This parameter indicates the ratio of the transfer case calculated by input speed divided by transmission output speed based on transmission commanded gear.
Trans. Fluid Temp. (TFT): Displays -40°C to 151°C (-40°F to 304°F). This parameter is the input signal of the transmission fluid temperature sensor. Transmission fluid temperature is high when the signal voltage is low (0 volts), and transmission fluid temperature is low when the signal voltage is high (5 volts).
Transmission Hot Mode: Displays ON or OFF. This parameter monitors the transmission fluid temperature. YES indicates that the transmission fluid temperature has exceeded 135°C (275°F).
Transmission ISS (Input Shaft Speed): Displays 0-8192 RPM. This parameter measures the rotational speed of the input shaft expressed as revolutions per minute.
Transmission OSS (Output Shaft Speed): Displays 0-8192 RPM. This parameter indicates the rotational speed of the transmission output shaft expressed as revolutions per minute. On four-wheel drive applications, the transfer case output shaft speed is measured.
Turbine Speed: Displays 0-8192 RPM. This parameter indicates the rotational speed of the torque converter turbine shaft expressed as revolutions per minute. In commanded gears 1, 2, and 3, the turbine speed equals the input speed. In commanded gear 4, the turbine speed equals 3/4 of the input speed.
Vehicle Speed: Displays 0-255 km/h (0-158 mph). This parameter is the input signal from the OSS sensor.
1-2 Shift Time Error: Displays a range of -6.38 to +6.38 seconds. This parameter is the difference between the desired 1-2 shift time and the actual 1-2 shift time. A positive number indicates the actual shift time was longer than the desired shift time. This value is only accurate if the Adaptable Shift parameter indicates Yes.
1-2 Solenoid: Displays ON or OFF. These parameters are the commanded status of the 1-2 shift solenoid valves. ON represents a commanded energized state (current is flowing through the solenoid). OFF represents a non-commanded state (current is not flowing through the solenoid).
1-2 Solenoid Open/Shorted to Ground: Displays Yes or No. This parameter indicates if an open or a short to ground exists in the feedback signal from the 1-2 shift solenoid valve to the PCM.
1-2 Solenoid Shorted to Volts: Displays Yes or No. This parameter indicates if a short to B+ exists in the feedback signal from the 1-2 shift solenoid valve to the PCM.
1-2 TAP Cell (4-16): Scan tool displays kPa or psi. This parameter displays the amount of pressure varied from a calibrated base line pressure for shifts. Each TAP cell is based on a calibrated shift torque value. Each TAP cell value is calculated from the last shift time. This cell pressure is used in addition to the calibrated base line pressure to adjust the apply of a clutch or band during the next shift.
2-3 Shift Time: Displays 0.00-6.38 seconds. This parameter is the actual time of the last 2-3 shift. The shift time is based on the gear ratio change after the commanded 2-3 shift. This value is only accurate if the adaptable shift parameter indicates Yes.
2-3 Shift Time Error: Displays a range of -6.38 to +6.38 seconds. This parameter is the difference between the desired 2-3 shift time and the actual 2-3 shift time. A positive number indicates the actual shift time was longer than the desired shift time. This value is only accurate if the Adaptable Shift parameter indicates Yes.
2-3 Solenoid: Displays ON or OFF. These parameters are the commanded status of the 2-3 shift solenoid valves. ON represents a commanded energized state (current is flowing through the solenoid). OFF represents a non-commanded state (current is not flowing through the solenoid).
2-3 Solenoid Open/Shorted to Ground: Displays Yes or No. This parameter indicates if an open or a short to ground exists in the feedback signal from the 2-3 shift solenoid valve to the PCM.
2-3 Solenoid Shorted to Volts: Displays Yes or No. This parameter indicates if a short to B+ exists in the feedback signal from the 2-3 shift solenoid valve to the PCM.
2-3 TAP Cell (4-16): Scan tool displays kPa or psi. This parameter displays the amount of pressure varied from a calibrated base line pressure for shifts. Each TAP cell is based on a calibrated shift torque value. Each TAP cell value is calculated from the last shift time. This cell pressure is used in addition to the calibrated base line pressure to adjust the apply of a clutch or band during the next shift.
3-4 Shift Time: Displays 0.00-6.38 seconds. This parameter is the actual time of the last 3-4 shift. The shift time is based on the gear ratio change after the commanded 3-4 shift. This value is only accurate if the adaptable shift parameter indicates Yes.
3-4 Shift Time Error: Displays a range of -6.38 to +6.38 seconds. This parameter is the difference between the desired 3-4 shift time and the actual 3-4 shift time. A positive number indicates the actual shift time was longer than the desired shift time. This value is only accurate if the Adaptable Shift parameter indicates Yes.
3-4 TAP Cell (4-16): Scan tool displays kPa or psi. This parameter displays the amount of pressure varied from a calibrated base line pressure for shifts. Each TAP cell is based on a calibrated shift torque value. Each TAP cell value is calculated from the last shift time. This cell pressure is used in addition to the calibrated base line pressure to adjust the apply of a clutch or band during the next shift.
4WD: Displays Enabled or Disabled. This parameter indicates whether the vehicle is currently in a four-wheel drive mode.
4WD Low: Displays Enabled or Disabled. This parameter is the signal state of the four-wheel drive low circuit. Enabled indicates a 0 voltage signal requesting 4WD low. Disabled indicates a B+ voltage signal which does not request 4WD low.
A/C Clutch: Displays ON or OFF. This represents the commanded state of the A/C clutch control relay. The clutch should be engaged whenever ON is displayed. The PCM compensates for the additional engine load that is accompanied with the A/C clutch engaged.
Adaptable Shift: The scan tool displays Yes or No. Yes indicates that the proper operating conditions (i.e. TP sensor, engine torque, vehicle speed data, engine vacuum, shift delay, etc.) 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 to update the adapt cells. No indicates that not all of the operating conditions were met in order to enable this function and that the adapt cells were not updated.
Cruise: Displays ENABLED or 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 commanded state of the shift solenoids.
Current TAP (Transmission Adaptive Pressure) Cell: Displays a torque based cell range of 0-16. This parameter indicates the current cell used for line pressure modification (adaptation).
Current TAP Memory: Displays a range of -110 to +110 kPa (-16 to +16 psi). This parameter is the amount of pressure that is added to base line pressure to adjust the holding effort of a clutch or a band, while shifting.
ECT (Engine Coolant Temperature): Displays -40°C to 151°C (-40°F to 304°F). This parameter is the input signal of the engine coolant temperature sensor. Engine coolant temperature is high when the signal voltage is low (0 volts), and engine coolant temperature is low when the signal voltage is high (5 volts).
Engine Run Time: Displays a range of 0:00:00-18:12:15 Hr/Min/Sec. This parameter measures how long the engine has been operating. When you turn the ignition switch OFF, the value resets to zero.
Engine Speed: Displays 0-8192 RPM. This parameter indicates the rotational speed of the engine expressed as revolutions per minute.
Engine Torque: Displays 0-9999 ft/lb. This parameter is a calculated value based on engine load, throttle position, mass air flow, and other engine and transmission inputs. This parameter is accurate to within 15 ft/lb of actual measured engine torque.
Gear Ratio: Displays a range of 0.00 to 8.00:1. This parameter is the actual gear ratio of the current commanded gear. In the current gear of R, D3, D2, and D1, it is calculated by dividing the input speed by the output speed. In the current gear of D4 with TCC lock up, the gear ratio is calculated by dividing the turbine speed by the output speed.
IAT (Intake Air Temperature): Displays a range of -40°C to 215°C (-40°F to 419°F). The IAT sensor is a thermistor used to monitor the temperature of the air entering the intake manifold. The PCM applies 5 volts to the sensor on a 5 volt reference circuit. When the air is cool, the resistance in the sensor is high. If the air is warm, the sensor resistance is low and the PCM senses a low voltage signal. The PCM converts the signal of the IAT sensor to degrees Celsius. Intake air temperature is used by the PCM to adjust fuel delivery and spark timing.
Ignition Voltage: Displays 0.0-25.5 volts. This parameter represents the system voltage measured by the PCM at the ignition feed.
Latest Shift: Displays 0.00-6.38 seconds. This parameter is the actual shift time of the last upshift. This value is only accurate if the adaptable shift parameter indicates YES.
Maximum Tap (Transmission Adaptive Pressure): Displays Yes or No. This parameter indicates when line pressure modification (adaptation) has reached its limit. Yes indicates the limit has been reached. No indicates the limit has not been reached.
PC (Pressure Control) Solenoid Act. (Actual) Current: Displays 0.00-1.1 amps. This parameter is the actual current of the pressure control solenoid circuit at the control module. Zero amp (no current flow) indicates an actual higher line pressure. A reading of 1.1 amp (high current flow) indicates an actual lower line pressure.
PC (Pressure Control) Solenoid Duty Cycle: Displays 0 percent-100 percent. This parameter is the commanded state of the pressure control solenoid expressed as a percentage of energized ON time. A reading of 0 percent indicates zero ON time (non energized), or no current flow. Approximately 60 percent at idle indicates maximum ON time (energized), or high current flow.
PC (Pressure Control) Solenoid Ref. (Reference) Current: Displays 0.00-1.1 amps. This parameter is the commanded current of the pressure control solenoid circuit at the control module. Zero amp (no current flow) indicates a commanded higher line pressure. A reading of 1.1 amp (high current flow) indicates a commanded lower line pressure.
Power Take-Off: Displays Yes or No. This parameter indicates when the Power Take Off (PTO) is engaged. PTO mode disables all transmission diagnostics.
Shift Torque: Displays a range of 0-510 (0-406 ft). This parameter is the torque value which is used in the commanded pressure calculation during shift. This parameter indicates the last shift torque.
Speed Ratio: The scan tool displays a range of 0.00:1-8.00:1. This parameter indicates engine speed divided by transmission output speed.
TCC Brake Switch (Gas Application): Displays Open or Closed. This parameter indicates the state of the TCC 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 not applied).
TCC Duty Cycle: Displays 0 percent-100 percent. This parameter is the commanded percentage of ON time of the TCC PWM solenoid. 90 percent represents an ON (energized) commanded state. 0 percent represents an OFF (non-energized) commanded state.
TCC Duty Cycle Open/Shorted to Ground: Displays Yes or No. This parameter indicates if an open or a short to ground exists in the feedback signal from the TCC PWM solenoid valve to the PCM.
TCC Duty Shorted to Voltage: Displays Yes or No. This parameter indicates if a short to B+ exists in the feedback signal from the TCC PWM solenoid valve to the PCM.
TCC Mode: Displays a range of 0 through 5. Zero (0), or Off Mode, indicates that the PCM commands the TCC OFF at a calibrated minimum throttle. The calibrated minimum throttle is different at low vehicle speeds than the throttle is at high vehicle speeds. Off Mode is also active when the transmission is in the wrong gear range, the engine or the transmission is cold, the brake input indicates that the brakes are ON, a downshift or upshift is initiated, the engine is at idle, the transmission is in Hot Mode or a misfire is detected. One (1), or release Mode, indicates that the PCM commands the release of the TCC. Two (2), or Apply Mode, indicates that the PCM commands the apply of the TCC. Apply pressure varies based on normal or performance operations, hot conditions or if the cruise control is active. Apply Mode is used under normal driving conditions. All apply pressure is dependent on throttle position and vehicle speed. The TCC applies with an average 65 percent duty cycle. Three (3), or Apply Enable Mode, indicates that enabling conditions are met for applying the TCC (enabling conditions include: vehicle speed, gear selection, transmission temperature, throttle angle, brake switch status, etc.). Four (4), or Locked Mode, indicates that the PCM commands full capacity of the TCC when the transmission is in fourth gear and the vehicle speed is greater than a calibrated value. When variable TCC apply pressure stops (apply mode), maximum TCC pressure is used. Five (5), or Coast Mode, indicates that the PCM commands apply of the TCC when the transmission is in fourth gear and the throttle, and vehicle speed, are not high enough to enable Apply Mode, but high enough to keep the TCC applied. When Coast Mode is active, TCC apply pressure is set to a predetermined amount.
TCC (Torque Converter Clutch) Slip Speed: Displays -4080 to +4079 RPM. This parameter is the difference between transmission input speed and engine speed. A negative value indicates that the engine speed is less than the input speed (deceleration). A positive value indicates that the engine speed is greater than the input speed (acceleration). A value of zero indicates that the engine speed is equal to the input speed (TCC is applied).
TFP Switch A/B/C: Displays HI/LOW, HI/LOW, HI/LOW. These parameters are the three inputs from the automatic transmission fluid pressure manual valve position switch Assembly. HI represents a 0 voltage signal. LOW represents a B+ voltage signal.
TFT (Transmission Fluid Temperature) Sensor: Displays 0.00-5.00 volts. When the transmission fluid is cold, the sensor resistance is high and the PCM senses a high signal voltage. As the transmission fluid temperature warms to normal operating temperature, the sensor resistance becomes less and the voltage decreases to about 1.5-2.0 volts.
TP (Throttle Position) Angle: Displays a range of 0 percent-100 percent. The TP angle is computed by the PCM from TP voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle (WOT).
TP (Throttle Position) Sensor (Gas): Scan tool displays a range of 0.00-5.00 volts. The PCM uses the TP sensor in order to determine the amount of throttle demanded by the driver. Voltage is below 1 volt at idle. Voltage is above 4 volts at wide open throttle (WOT).
Tow/Haul Mode: Displays Yes or No. This parameter indicates when the transmission is operating in a Tow/Haul mode. In Tow/Haul mode, the PCM commands a different shift pattern that increases performance when towing and hauling. Shift quality and TCC scheduling are also affected during Tow/Haul mode operation.
Transfer Case Ratio: The scan tool displays a range of 0.00-3.88:1. This parameter indicates the ratio of the transfer case calculated by input speed divided by transmission output speed based on transmission commanded gear.
Trans. Fluid Temp. (TFT): Displays -40°C to 151°C (-40°F to 304°F). This parameter is the input signal of the transmission fluid temperature sensor. Transmission fluid temperature is high when the signal voltage is low (0 volts), and transmission fluid temperature is low when the signal voltage is high (5 volts).
Transmission Hot Mode: Displays ON or OFF. This parameter monitors the transmission fluid temperature. YES indicates that the transmission fluid temperature has exceeded 135°C (275°F).
Transmission ISS (Input Shaft Speed): Displays 0-8192 RPM. This parameter measures the rotational speed of the input shaft expressed as revolutions per minute.
Transmission OSS (Output Shaft Speed): Displays 0-8192 RPM. This parameter indicates the rotational speed of the transmission output shaft expressed as revolutions per minute. On four-wheel drive applications, the transfer case output shaft speed is measured.
Turbine Speed: Displays 0-8192 RPM. This parameter indicates the rotational speed of the torque converter turbine shaft expressed as revolutions per minute. In commanded gears 1, 2, and 3, the turbine speed equals the input speed. In commanded gear 4, the turbine speed equals 3/4 of the input speed.
Vehicle Speed: Displays 0-255 km/h (0-158 mph). This parameter is the input signal from the OSS sensor.
