DIAGNOSTIC RESPONSE:None CIRCUIT DESCRIPTION:The Transmission Health Monitor is (TM) is part of the 4th Generation Control System Prognostics package. This feature monitors adaptively learned clutch volume changes. These volumes are correlated to calculated free running clearances for each of the transmission clutches C1, C2, C3, C4, and C5. The adaptive information is compared with the baseline volumes and clearances established by the function when the clutches were new or just after a function reset was performed following a clutch system repair. If the predicted clutch life left for C1 through C5 is 6% or less, or if the predicted free...

DIAGNOSTIC RESPONSE:Inhibit kickdown operation CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) can be calibrated to receive an acceleration pedal kickdown input from either an analog input wire or a digital datalink message. When the operator activates the kickdown feature in the Economy Mode, the TCM uses Performance shift points. A momentary, normally open switch attached to the throttle pedal typically generates the kickdown input signal. The switch usually provides a detente feel when full-throttle is achieved. Some OEMs may opt to send a kickdown datalink message when a threshold for accelerator pedal percentage has been reached (e.g., 95%), and not implement...

DIAGNOSTIC RESPONSE:Ignores PWM input from shift selector CIRCUIT DESCRIPTION:The OEM 4th Generation Controls shift selectors communicates with the Transmission Control Module (TCM) by exchanging standardized digital messages over the SAE J1939 Controller Area Network (CAN). The shift selectors are also equipped with a single wire backup to the SAE J1939 CAN datalink. The OEM 4th Generation shift selectors transmit directional information (Forward, Neutral, and Reverse) in form of an analog Pulse-Width Modulated (PWM) signal via wire 134 to the TCM. The shift selector switches an internal driver ON and OFF to vary the duty cycle of the voltage on wire...

DIAGNOSTIC RESPONSE:DNS, RPR CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses input from the turbine speed and output speed sensors to determine the current commanded for steady-state gear ratio. The TCM then compares the known gear ratio to the calculated gear ratio for the current range. This DTC test determines if the on-coming clutch controlled by Pressure Control Solenoid 6 (PCS6) engages during a forward range shift. PCS6 controls the C6 clutch for Low range in 3700/4700/4800 transmission models. PCS6 controls C6 clutch for Reverse 2 in the 4700/4800 model. CONDITIONS FOR RUNNING THE DTC:1. Hydraulic system is pressurized.2. Hydraulic default...

DIAGNOSTIC RESPONSE:DNS, RPR CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses input from the turbine speed and output speed sensors to determine the current commanded for steady-state gear ratio. The TCM then compares the known gear ratio to the calculated gear ratio for the current range. This DTC test determines if the off-going clutch controlled by Pressure Control Solenoid 6 (PCS6) remains engaged during a forward range shift. PCS6 controls the C6 clutch for Low Gear in 3700/4700/4800 transmission models. PCS6 controls C6 clutch for Reverse 2 in the 4700/4800 model. CONDITIONS FOR RUNNING THE DTC:1. Hydraulic system is pressurized.2. Hydraulic...