P1E3B

DTC P1E3B

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P1E3B

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Drive Motor Rotor Overtemperature

Circuit/System Description

The generator control module also called the starter generator control module is comprised of the following three control modules; the hybrid powertrain control module, 14 volt power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.

The starter generator is also referred to as the drive motor. The drive motor temperature sensor is a variable resistor that measures the temperature of the drive motor stator windings. The hybrid powertrain control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The hybrid powertrain control module calculates a value to estimate the drive motor rotor temperature. The hybrid powertrain control module uses the stator temperature, drive motor current, and commanded motor torque in order to calculate the value for the drive motor rotor temperature.

Conditions for Running the DTC

The drive motor control module and hybrid powertrain control module are awake.

Conditions for Setting the DTC

* DTCs P0A3F, P1A40, P1B03, P1B0D, P0C52, P0C53, P0C5C, P0C5D, P1AE8, P1AE9, P1AEC, P0BFD, P0BE6, P0BE7, P0BE8, P0BEE, P0BEF, and P0BF0 are not set.

* The motor rotor temperature calculation is greater than 197°C (387°F) for 8 seconds and has not fallen below 194°C (381°F).

Action Taken When the DTC Sets

* DTC P1E3B is a Type B DTC.

* The hybrid powertrain control module system starts to reduce the maximum torque beginning at 180°C (356°F) down to 0 NM as the calculated drive motor rotor temperature approaches 200°C (392°F).

Conditions for Clearing the DTC

DTC P1E3B is a Type B DTC.

Diagnostic Aids

* Ask about the customer's driving habits, trailer towing, etc.

* Ensure the engine cooling system is functioning normally.

* The drive motor stator temperature should be within 60°C (140°F) of the motor calculated rotor temperature.

Reference Information

Schematic Reference

Hybrid Energy Storage Schematics [1][2]Electrical Diagrams

Description and Operation

* Starter Generator Description and Operation Starter Generator Description and Operation

* Generator Control Module Description and Operation Generator Control Module Description and Operation

* Hybrid Modes of Operation Description Hybrid Modes of Operation Description

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Verification

1. Check the cooling system for the correct amount of coolant. Refer to Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716).

2. Verify that DTC P0A2C, P0CC1-P0CC4 is not set.

• If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

3. Start the engine and observe the scan tool motor A calculated rotor temperature parameter. The reading should be less than 180°C (356°F). If greater than the specified value, check the cooling system and pump for proper operation. If there is coolant and flow then monitor the calculated rotor temperature and verify that it drops below 180°C (356°F). If the temperature does not drop below 180°C (356°F) then reprogram the K59 starter generator control module. If the DTC resets, replace the K59 starter generator control module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Programming and Relearning for Generator Control Module, also called the Starter Generator Control Module, replacement, programming and setup.