Hybrid/EV Powertrain Control Module 1
Location
The hybrid/EV powertrain control module 1 is a non-serviceable, flash-programmable micro-processor that is part of the generator control module.
Operating Functions
The hybrid/EV powertrain control module 1 is the main controller of powertrain operation. The hybrid/EV powertrain control module 1 determines when to perform normal operating modes such as auto stop, launch assist mode, and regenerative braking. The hybrid/EV powertrain control module 1 also operates in conjunction with the hybrid/EV powertrain control module 2 to determine when to enable and disable the DC high voltage circuits. The motor control module operates the drive motor based upon hybrid/EV powertrain control module 1 commands.
Communication and Hosted Diagnostics
The hybrid/EV powertrain control module 1 is the host controller for DTC and scan tool parameter information for the following control modules:
- 14V power module
- Drive motor control module
These modules diagnose their own operation and determine when a fault condition is present. The 14V power module communicates diagnostic status to the hybrid/EV powertrain control module 1 over serial data.
The drive motor control module and the hybrid/EV powertrain control module 1 exchange information and commands on a serial peripheral interface bus internal communication circuit as well as the hi-speed serial data communication circuit.
In the event the hybrid/EV powertrain control module 2 communicates a fault condition, the hybrid/EV powertrain control module 1 will determine if one or more operating modes are affected and notify the vehicle operator by requesting the MIL illuminate and/or by displaying a message in the Driver Information Center. In addition, the hybrid/EV powertrain control module 1 will store the associated DTC information for retrieval by a scan tool. Some hosted modules may require an ignition cycle to clear certain DTCs from the hybrid/EV powertrain control module 1.
Circuit Inputs
In addition to data parameters, the hybrid/EV powertrain control module 1 directly monitors the following signal circuits:
- Engine crankshaft position sensor signal (via serial data message from ECM - not direct)
- High voltage interlock circuit
- Brake Pedal Position
- Drive Motor Position (via motor control module)
- Hood switch
- Various internal signals (temps, etc.)
Circuit Outputs
In addition to control through other controllers, the hybrid/EV powertrain control module 1 directly controls:
- Automatic transmission auxiliary fluid accumulator
- Drive Motor
- Drive Motor Cooling pump