eTORQUE SYSTEM - 3.6L: Notes

DESCRIPTION 

The eTorque system is comprised of several different components. Those components are:

Courtesy of CHRYSLER GROUP, LLC

1.	Refer to: MOTOR GENERATOR UNIT (MGU) .
2.	Refer to: 48 VOLT WIRING .
3.	Refer to: POWER PACK UNIT (PPU) .

Listed below are the other components that contribute to the eTorque system:

-	Refer to: ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
-	Refer to: BODY CONTROL MODULE (BCM) .
-	Refer to: HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) MODULE .
-	Refer to: INTELLIGENT BATTERY SENSOR (IBS) .
-	Refer to: INSTRUMENT PANEL CLUSTER (IPC) .
-	Refer to: POWERTRAIN CONTROL MODULE (PCM) .
-	Refer to: POWER ELECTRONICS COOLANT PUMP .
-	Refer to: TRANSMISSION CONTROL MODULE (TCM) .
-	Refer to: STOP/START DISABLE SWITCH (BUTTON)  - The Electric Stop/Start button is located in the shifter.
-	Refer to: STARTER MOTOR .
-	Refer to: POTENTIAL ELECTRIC STOP/START SYSTEM INHIBITORS .
-	Refer to: DOOR AJAR SWITCHES .
-	Refer to: HOOD AJAR SWITCH .
-	Refer to: OCCUPANT RESTRAINT CONTROLLER (ORC) .

The eTorque system automatically stops and starts the engine when certain conditions are met to improve fuel economy and lower Carbon Dioxide (CO2) emissions. The eTorque enable and disable selection switch is integral to the Transmission Shifter.

The Battery, Starting, and Charging systems operate in conjunction with one another, and must be tested as a complete system. For correct operation of starting/charging systems, all components used in these three systems must perform within specifications. When attempting to diagnose any of these systems, it is important that you keep their interdependency in mind.

Certain starting system components and functions of the eTorque system are On Board Diagnostics (OBDII) monitored and will produce Diagnostic Trouble Codes (DTC). The use of the diagnostic scan tool is not only recommended, but it is necessary for proper diagnostics of the eTorque system and the components or systems that are related to eTorque system functions. Review the component and system information listed below for diagnostic information. Otherwise, review the wiring diagrams as well as appropriate service information.

The eTorque system uses a high torque electric 48 Volt motor to function as a starter for Electric Stop/Start. The eTorque system, when active, will shut the engine off with a signal from the PCM when the vehicle is stopped, then start the engine when there is a demand for power. The eTorque system utilizes its own contained cooling system. For more information on the cooling system for the eTorque system, please refer to: Cooling System/Standard Procedure.

The vehicles first engine crank event is managed by the driver starting the vehicle normally with the key or the start/stop button. During the initial start the BCM cranking relay is opened and the PCM cranking relay is closed. When the engine is ON and the engine cranking phase has ended, the PCM cranking relay will then be opened and the BCM cranking relay will then be closed. All of the next automatic eTorque cranking events managed in the same Key-ON ignition cycle are performed maintaining the BCM cranking relay closed and setting closed the PCM cranking relay. Each time an eTorque cranking event occurs which causes the engine to run again, the PCM cranking relay is opened.

The restart procedure for the TCM is performed when the PCM requests an eTorque auto-start event to occur, the PCM sends a request to start message to the TCM. The TCM will then engage the neutral gear to avoid vehicle movement in case of a TCM module reset event during the engine cranking stage of the eTorque event. The TCM sends a signal to the PCM advising the PCM that the transmission is ready for the eTorque event to occur.