DIAGNOSTIC RESPONSE:Use default throttle values. Freezes shift adapts. CIRCUIT DESCRIPTION:The TCM may be calibrated to receive an analog Throttle Position Sensor (TPS) pedal position signal from a TPS. Throttle position information comes from a resistive sensor. The resistive throttle sensor is attached to throttle linkage. This device produces a voltage proportional to throttle position. NOTE: Refer to Throttle Position Sensor (TPS) Adjustment for the TPS adjustment procedure and signal voltage specifications. NOTE: The transmission TPS is not the same accelerator pedal sensor that the driver actuates to the accelerate the vehicle. The transmission TPS is not used to fuel, accelerate,...

DIAGNOSTIC RESPONSE:Use default sump temperature CIRCUIT DESCRIPTION:The Transmission Fluid Temperature (TFT) sensor is incorporated into the internal wiring harness and measures the sump temperature. The TFT sensor is a thermistor (thermally sensitive resistor) that changes its resistance value based on the temperature of the transmission fluid. The Transmission Control Module (TCM) supplies a 5V reference voltage signal to a reference resistor inside the TCM that is in series with the TFT sensor. The voltage drop across the TFT sensor is constantly changing as the TFT sensor resistance varies due to the change in transmission fluid. When the transmission is cold...

DIAGNOSTIC RESPONSE:Inhibits TCC Operation, DNA CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) requires a switched ignition voltage input to operate. This switched ignition voltage signal originates from the ignition switch or an ignition relay to supply voltage to wire 163 in the 80-way connector at the TCM. The ignition sense power signal to terminal 63 turns the TCM ON from its power-down state. The TCM reads the calibration data in memory, reads the PROM, checks all sensors for readiness, then commands the transmission and shift selector to N (Neutral). The throttle position calibration is adjusted as necessary from the stored data,...

DIAGNOSTIC RESPONSE:Lock in Neutral CIRCUIT DESCRIPTION:At power up and after clearing DTC, the Transmission Control Module (TCM) performs a self-test to determine if the calibration in memory is valid. CONDITIONS FOR RUNNING THE DTC:This test will run before any TCM functions. CONDITIONS FOR SETTING THE DTC:DTC P0602 sets if the TCM determines the present calibration is invalid. ACTION TAKEN WHEN THE DTC SETS:1. The CHECK TRANS light illuminates.2. DTC is stored in the TCM history.3. The TCM returns to the boot program, and then waits to be recalibrated.4. The TCM inhibits shifts to range. CONDITIONS FOR CLEARING THE DTC:TCM must...

DIAGNOSTIC RESPONSE:Use default sump temperature CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) performs an internal memory self-test at power up that writes and reads patterns at specific RAM locations to verify that all addresses and data lines are functioning correctly. CONDITIONS FOR RUNNING THE DTC:TCM software level January 2011 or higher. CONDITIONS FOR SETTING THE DTC:DTC P0604 sets if the TCM determines the TCM memory pattern that was written is not what was read from TCM memory during the self- test. ACTION TAKEN WHEN THE DTC SETS:1. The CHECK TRANS light illuminates.2. DTC is stored in the TCM history on next...