DIAGNOSTIC RESPONSE:No Neutral to Drive shifts for refuse packer. TCM inhibits retarder operation if a TPS code is also active. CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) can be calibrated to receive a Service Brake Status (SBS) input from either an analog input wire or the digital datalink. An Original Equipment Manufacturer (OEM) switch is attached to the brake pedal and sends a signal to either the TCM directly or another electronic controller in the vehicle. When another controller is used, the TCM typically receives SBS as a datalink message. However, other vehicle controllers could be responsible for switching the input...

DIAGNOSTIC RESPONSE:Ignore defective strip selector inputs CIRCUIT DESCRIPTION:The 3000 and 4000 Product Family Transmission Control Module (TCM) can receive input from a strip-type shift selector. This type of shift selector communicates with the TCM via 4-bit parallel data wires. The strip shift selector button position determines the switch state (low or high voltage) of each parallel data wire. The TCM interprets each particular combination of switch states into a specific range selection, i.e. Reverse, Neutral, and Drive. The TCM sets DTC P0708 if the switch state of the four parallel data wires does not agree with a valid switch combination....

DIAGNOSTIC RESPONSE:Use default throttle values. Freezes shift adapts CIRCUIT DESCRIPTION:The Oil Level Sensor (OLS) uses an internal float and internal hall effect sensor to provide a signal voltage to the TCM that is proportional to the sensor detected float level and current fluid level. The TCM provides a 5V reference voltage to the OLS. NOTE: The OLS is standard on any 3000 and 4000 Product Families 4th Generation Controls transmission except for the 3700SP or any of the 4700/4800 retarder models where it is unavailable. NOTE: The TCM calibration is specified to always autodetect the OLS; however, re-programming the CMC...

DIAGNOSTIC RESPONSE:None CIRCUIT DESCRIPTION:The Oil Level Sensor (OLS) uses an internal float and internal hall effect sensor to provide voltage to the TCM that is proportional to the sensor detected float level and current fluid level. The TCM provides a 5V reference voltage to the OLS. NOTE: The OLS is standard on any 3000 and 4000 Product Families 4th Generation Controls transmissions except for the 3700SP or any of the 4700/4800 retarder models where it is unavailable. NOTE: The TCM calibration is specified to always autodetect the OLS; however, re-programming the CMC ‘Override Oil Level Sensor’ to ‘Present’ or ‘Not...

DIAGNOSTIC RESPONSE:Use default sump temperature CIRCUIT DESCRIPTION:The Transmission Fluid Temperature (TFT) sensor is incorporated into the internal wiring harness. The TFT sensor is 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 TCT sensor. The voltage drop across the TCT sensor is constantly changing as the TFT sensor resistance varies due to the change in transmission fluid. When the transmission is cold, the sensor resistance is high and...