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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–22 negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted to A/C Clutch: This parameter displays the condition of the sirconditioning compressor as either On or Off. AT Output Speed: This parameter displays the rotational speed of the transmission output shaft. Tech 2 displays output Commanded Gear: This parameter displays the current commanded state of the shift solenoid valves. Tech 2 displays 1, Current TAP Cell: This parameter displays the current transmission adaptive pressure (TAP) cell in use for transmission Engine Coolant Temperature: This parameter displays the input signal from the engine coolant temperate (ECT) Engine Speed: This parameter displays the rotational speed of the engine expressed as revolutions per minute. Engine Torque: This parameter displays the calculated value based on engine load, throttle position, mass air flow, and Estimated Gear Ratio: This parameter displays the estimated turbine speed divided by the transmission output speed. Ignition Voltage: This parameter displays the system voltage measured at the ignition feed. Latest Shift: This parameter displays the actual time of the last upshift. This value is only accurate if the shift was PCS Actual Current: This parameter displays the current flow through the pressure control solenoid circuit, which is PCS Duty Cycle: This parameter displays the commanded state of the pressure control solenoid, expressed as a PCS Desired Current: This parameter displays the commanded current of the pressure control solenoid circuit. High Shift Pattern: This parameter displays Normal, Power or Cruise depending on what mode the transmission is in. Shift Solenoid A: This parameter displays the commanded state of the 1-2 shift solenoid valve. When the transmission st and 4 th gear, the display should indicate On; current is flowing through the solenoid. When the transmission is in 2 nd and 3 rd gear, the display should indicate Off; current is not flowing through the solenoid. Shift Solenoid A Circuit: This parameter displays whether an open or a short to ground, short to battery or the circuit is Shift Solenoid B: This parameter displays the commanded state of the 2-3 shift solenoid valve. When the transmission st and 4 th gear, the display should indicate On; current is flowing through the solenoid. When the transmission is in 2 nd and 3 rd gear, the display should indicate Off; current is not flowing through the solenoid. Shift Solenoid B Circuit: This parameter displays whether an open or a short to ground, short to battery or the circuit is Speed Ratio: This parameter displays the calculated speed ratio of the transmission. TCC Duty Cycle Circuit: This parameter displays whether an open or a short to ground, short to battery or the circuit is TCC Solenoid: This parameter displays the commanded sate of the TCC solenoid. On indicates a commanded TCC Slip Speed: This parameter displays the difference between transmission output speed and engine speed. A TCC PWM Solenoid: This parameter displays the commanded percentage of on time for the TCC PWM solenoid. A high |