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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (2.0L Electrified Powertrain System (2 Of 2)) >> Electric Powertrain Control >> Description And Operation >> Power Inverter Module (PIM)

Power Inverter Module (PIM)

WARNING: This page is about a different variant/trim than selected.

DESCRIPTION 

GC0203218Courtesy of CHRYSLER GROUP, LLC

The Hybrid Control Processor (HCP) is integral to the Power Inverter Module (PIM). The HCP provides the strategy for charging the 12 volt battery and the Power Pack Unit (PPU). The HCP monitors the High Voltage (HV) system, B+, switched ignition, crankshaft pulse signals and Controller Area Network (CAN) bus circuits for any concerns. The HCP can also detect any internal failures, high temperature and resolve failures.

The HCP monitors the RPM of the MGU and compares them to the Engine RPM for belt slip. The HPC can increase or decrease the torque of the MGU to compensate through the PIM and the HV connection.

NOTE:

The HCP is flash programmable and is sensitive to cold temperature during module flashing. The HCP will need to be flashed when the vehicle is at room temperature. Not flashing the module at room temperature can cause the flash procedure to fail to complete, which could lead to an unnecessary component replacement.

The Gen2 PIM is a dual 125kW inverter that supports the use of two E-Motors, the Motor Generator Unit (MGU) and the E-Motor internal to the transmission and is protected by a serviceable fuse behind a cover (2). The operating voltage range is between 180-450 VDC.

The High Voltage (HV) Power Inverter Module (PIM) is located under the vehicle, is made of aluminum and is fully insulated. The PIM is part of the Power Electronics Cooling loop to remove the heat that is generated during operation.

  1. PIM Electronic Control Module Vehicle Connection
  2. High Voltage Charging Cable
  3. Coolant "IN" from the Integrated Dual Charging Module IDCM
  4. Coolant "OUT" to the transmission cooler
  5. High Voltage connection to the Motor Generator Unit (MGU)
  6. High Voltage connection to the P2 motor internal to the transmission
  7. Fuse cover plate with safety switch
  8. Connection to the Electric A/C Compressor (EAC) and the Auxiliary power electronics coolant heater

OPERATION 

The PIM is the connection between the battery pack, MGU and the e-motor internal to the transmission. It sends the High Voltage Direct Current (HVDC) to power the motors for starting.

The amount of current controls the MGU torque.

The frequency of the three-phase AC determines the MGU speed and rotation.

The PIM is also responsible for high voltage battery system temperature control utilizing the following inputs and outputs:

Inputs

Outputs

The PIM controls the high-level activity of all of the powertrain components when the vehicle is plugged in. It communicates with Integrated Dual Charger Module (IDCM), Battery Pack Control Module (BPCM) and Instrument Panel Cluster (IPC) to achieve the following functions:

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