Circuit/System Description

The Auxiliary Transmission Fluid Pump Control Module and the Hybrid Powertrain Control Module 1 are all internal to the Power Inverter Module. The Auxiliary Transmission Fluid Pump Control Module communicates only with the Hybrid Powertrain Control Module 1 with the Hybrid Powertrain Control Module 1 sending out diagnostic trouble code information to other control modules regarding the Auxiliary Transmission Fluid Pump Control Module. All circuits to the Hybrid Powertrain Control Module 1 and Auxiliary Transmission Fluid Pump Control Module are also internal to the Power Inverter Module and replaced as a single component.

Communication diagnostics for the serial data, including control module power and ground as well as the wakeup circuits for Auxiliary Transmission Fluid Pump Control Module and the Hybrid Powertrain Control Module 1 are all diagnosed from external sources only to the Power Inverter Module connector because any circuit fault condition within the Power Inverter Module will cause a complete replacement.