CIRCUIT DESCRIPTION:High Side Driver 1 (HSD1) supplies battery voltage to the Main Modulation, Torque Converter Clutch (TCC) and Pressure Control Solenoid 1 (PCS1) solenoids via wire 111. HSD1 is continuously on during normal operation except during brief circuit tests. The TCM regulates control current to the solenoids by switching the appropriate low side driver on and off. DTC P0658 indicates the TCM has detected that all solenoids connected to the HSD1 are inactive with a supply voltage in the HSD1 circuit of less than a calibrated value. DTC P0658 indicates a short-to-ground has occurred in the high side wiring attached...

CIRCUIT DESCRIPTION:High Side Driver 1 (HSD1) supplies battery voltage to the Main Modulation, Torque Converter Clutch (TCC) and Pressure Control Solenoid 1 (PCS1) solenoids via wire 111. HSD1 is continuously on during normal operation except during brief circuit tests. The TCM regulates control current to the solenoids by switching the appropriate low side driver on and off. DTC P0659 indicates the TCM has detected greater than a calibrated value in the HSD1 circuit when HSD1 is OFF during TCM initialization (this indicates that a short to battery exists on the high side circuit 111). ACTION TAKEN WHEN THE DTC SETS:When...

CIRCUIT DESCRIPTION:The TCM monitors the status of the pressure switches at start-up to detect the presence of hydraulic pressure. ACTION TAKEN WHEN THE DTC SETS:1. The CHECK TRANS light is not illuminated (non-OBD II strategy).2. The TCM forces Variable Modulated Main off.3. A latched range inhibit is commanded. Operator is required to reselect range.4. DTC is stored in the TCM history. CONDITIONS FOR CLEARING THE DTC:The diagnostic tool may be used to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without the DTC recurring....

CIRCUIT DESCRIPTION:Service brake status is relayed to the TCM by a mechanical switch, or over the J1939 datalink indicating the service brake has been applied. Input wire 162 is used to send a positive signal to the TCM. DTC P0703 is only triggered when input wire 162 is being used for the brake switch and when the number of vehicle accelerations with brake switch “ON” exceeds a calibration value or when the number of vehicle decelerations to a stop with the brake switch “OFF” exceeds a calibration value. This code will not be triggered if the Service Brake Status Input...

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 P0706 sets when the Engine Control Module (ECM) allows a start in reverse or forward range. ACTION TAKEN WHEN THE DTC SETS:1. The...