CIRCUIT DESCRIPTION:An Internal Mode Switch (IMS) is used by the TCM to detect the angular position of the shift selector shaft. There are five internal switches in the IMS: A, B, C, P, and NS. The TCM uses four of these switch inputs to determine the proper gear range that is selected. The fifth switch (NS), located in the IMS, is used as confirmation that the transmission is in neutral before the engine starter is engaged. DTC P0708 sets when the TCM detects an invalid switch condition and parity errors occur over consecutive ignition cycles. ACTION TAKEN WHEN THE DTC...

CIRCUIT DESCRIPTION:The Transmission Fluid Temperature (TFT) sensor is incorporated into the Pressure Switch Manifold (PSM), which is located in the transmission oil pan. The TFT sensor is a thermistor that changes its resistance value based on the temperature of the transmission fluid. The Transmission Control Module (TCM) measures the voltage drop across the TFT sensor. As the TFT sensor resistance changes the voltage drop recorded across the thermistor will increase or decrease proportionately. The TCM uses this information to determine sump temperature. ACTION TAKEN WHEN THE DTC SETS:1. The TCM does not illuminate the CHECK TRANS light.2. The MIL illuminates...

CIRCUIT DESCRIPTION:The Transmission Fluid Temperature (TFT) sensor is incorporated into the Pressure Switch Manifold (PSM), which is located in the transmission oil pan. The TFT sensor is a thermistor that changes its resistance value based on the temperature of the transmission fluid. The Transmission Control Module (TCM) measures the voltage drop across the TFT sensor. As the TFT sensor resistance changes the voltage drop recorded across the thermistor will increase or decrease proportionately. The TCM uses this information to determine sump temperature. DTC P0712 sets when the TFT sensor indicates a resistance of less than a calibrated value for a...

CIRCUIT DESCRIPTION:The Transmission Fluid Temperature (TFT) sensor is incorporated into the Pressure Switch Manifold (PSM), which is located in the transmission oil pan. The TFT sensor is a thermistor that changes its resistance value based on the temperature of the transmission fluid. The Transmission Control Module (TCM) measures the voltage drop across the TFT sensor. As the TFT sensor resistance changes the voltage drop recorded across the thermistor will increase or decrease proportionately. The TCM uses this information to determine sump temperature. DTC P0713 sets when the TFT sensor indicates a resistance of higher than a calibrated value for a...

CIRCUIT DESCRIPTION:The speed sensors are variable reluctance devices which convert mechanical motion to an AC voltage. Each sensor consists of a wire coil wrapped around a pole piece that is adjacent to a permanent magnet. These elements are contained in a housing which is mounted adjacent to a rotating ferrous member. Two signal wires extend from one end of the housing and an exposed end of the pole piece is located at the opposite end of the housing. The permanent magnet produces lines of flux around the pole piece. As a ferrous object (a rib on the rotating clutch drum)...