Circuit Inputs

Inputs to the 14V power module include the high voltage and 12 volt circuits. The 14V power module also has two 12 volt discrete inputs, Accessory and Run/Crank, either one has to be at a high level in order for it to wake up. The 14V power module is connected to the powertrain expansion communication circuit and communicates with the hybrid powertrain control module. The 14V power module monitors various internal components for current, voltage and temperature. The 14V power module will not begin supplying 12 volts DC until:

• Either the Accessory input or Run/Crank input are high, and
• The appropriate serial data enable signal is communicated by the hybrid powertrain control module.

The14V power module will not begin conversion of voltage however, until the appropriate serial data enable signal is sent by the hybrid powertrain control module.

For more information on the 12 V Battery Charging System, refer to Charging System Description and Operation .