Volt

DTC P1E33

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Two of the motor control modules operate their respective drive motor generator based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump motor.

Each motor control module operates its respective drive motor based upon hybrid powertrain control module commands. Each motor control module controls its respective motor through the sequencing actuation of high-current switching transistors called insulated gate bipolar transistors. Each motor operates utilising 3-phase alternating current AC electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor generator. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect out-of-range current conditions.

Because each individual motor's phase circuits are electrically joined together, the phases normally flow about the same amount of current. The motor control module performs a mathematical calculation to verify that the phase current sensors are accurate. If the U-V-W phase current sensors indicate about the same amount of phase current, the sum of the calculation should be near zero. If the U-V-W phase currents are not similar, this DTC will set.

The sum of the 3-phase current sensors is greater than 5 A.

DTC P1E33 is a Type A DTC.

DTC P1E33 is a Type A DTC.

Schematic Reference

Hybrid Controls Schematics

Connector End View Reference

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Danger: Always perform the High-Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High-Voltage Disabling procedure will perform the following tasks:

•	Identify how to disable high voltage.

•	Identify how to test for the presence of high voltage.

•	Identify conditions under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.
1. Perform the High Voltage Disabling procedure for servicing the T6 power inverter module assembly or T12 transmission.
2. Remove the X8 connector from the T6 power inverter module.
3. Test for infinite resistance between the AC circuit terminals listed below and ground:

•	Terminal 1-phase W

•	Terminal 2 phase V

•	Terminal 3-phase U

⇒	If not the specified value, replace the G5 auxiliary transmission fluid pump motor.

⇒	If the circuit tests normal, replace the T6 drive motor power inverter module. If the DTC resets, replace the G5 auxiliary transmission fluid pump motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.