P0BBE
DTC P0BBE
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 P0BBE
- Hybrid/EV Battery Pack Voltage
Circuit/System Description
The drive motor battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the drive motor battery assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells / 30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through 96. Battery section two is located behind section one. It is made up of 72 cells / 24 cell groups and contains batteries 43 through 66. The transverse battery section is section number three, it is made up of the remaining 126 cells / 42 cell groups and contains batteries 1 through 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery triplets. Voltage sense lines are attached to each individual triplet, and these sense lines terminate at a connector located on the top surface of the battery section. A serviceable voltage sense harness joins this connector to a drive motor battery high voltage interface control module, also located on the top surface of the battery section. The drive motor battery high voltage interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one drive motor battery high voltage interface control module located on battery sections one and two, and two drive motor battery high voltage interface control modules associated with battery section three. The drive motor battery high voltage interface control module, voltage sense harnesses, battery control harness and battery energy control module are all considered serviceable components.
The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.
Conditions for Running the DTC
* None of the following DTCs are set: P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D, P0B92, P0B97, P0B9C, P0BA1, P0BA6, P0BAB, P0BB0, P0BB5, P0BBA, P1B17, P1B1A, P1B1D, P1B20, P1B23, P1B26, P1B46, P1B49, P1B4C, P1B4F, P1B52, P1B55, P1B58, P1B5B, P1B5E, P1B61, P1B64, P1B67, P1B6A, P1B6D, P1B70, P1B73, P1B76, P1B79, P1B7C, P1B7F, P1B82, P1B85, P1B88, P1B8B, P1B8E, P1B91, P1B94, P1B97, P1B9A, P1B9D, P1BA0, P1BA3, P1BA6, P1BA9, P1BAC, P1BAF, P1BB2, P1BB5, P1BB8, P1BBB, P1BBE, P1BC1, P1BC4, P1BC7, P1BCA, P1BCD, P1BD0, P1BD3, P1BD6, P1BD9, P1BDC, P1BDF, P1BE2, P1BE5, P1BE8, P1BEB, P1BEE, P1BF1, P1BF4, P1BF7, P1BFA, P1BFD, P1E02, P1E05, P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E, P0B93, P0B98, P0B9D, P0BA2, P0BA7, P0BAC, P0BB1, P0BB6, P0BBB, P1B18, P1B1B, P1B1E, P1B21, P1B24, P1B27, P1B47, P1B4A, P1B4D, P1B50, P1B53, P1B56, P1B59, P1B5C, P1B5F, P1B62, P1B65, P1B68, P1B6B, P1B6E, P1B71, P1B74, P1B77, P1B7A, P1B7D, P1B80, P1B83, P1B86, P1B89, P1B8C, P1B8F, P1B92, P1B95, P1B98, P1B9B, P1B9E, P1BA1, P1BA4, P1BA7, P1BAA, P1BAD, P1BB0, P1BB3, P1BB6, P1BB9, P1BBC, P1BBF, P1BC2, P1BC5, P1BC8, P1BCB, P1BCE, P1BD1, P1BD4, P1BD7, P1BDA, P1BDD, P1BE0, P1BE3, P1BE6, P1BE9, P1BEC, P1BEF, P1BF2, P1BF5, P1BF8, P1BFB, P1BFE, P1E03, P1E06, P1E90, P1E8F, P1E91, P1E8E, P1E93, P1E96, P1E95, P1E97, P1E94, P1E99, P1E9C, P1E9B, P1E9D, P1E9A, P1E9F, P1EA2, P1EA1, P1EA3, P1EA0, P1EA5, P1EB1, P1EB5, P0B3B, P0B40, P0B45, P0B4A, P0B4F, P0B54, P0B59, P0B5E, P0B63, P0B68, P0B6D, P0B77, P0B7C, P0B81, P0B86, P0B8B, P0B95, P0B9A, P0B9F, P0BA4, P0BA9, P0BAE, P0BB3, P0BB8, P1B28, P1B29, P1B2A, P1B2B, P1B2C, P1B2D, P1E4C, P1E4D, P1E4E, P1E4F, P1E50, P1E51, P1E52, P1E53, P1E54, P1E56, P1E57, P1E58, P1E59, P1E5A, P1E5B, P1E5C, P1E5D, P1E5E, P1E5F, P1E60, P1E61, P1E62, P1E63, P1E64, P1E65, P1E66, P1E67, P1E68, P1E69, P1E6A, P1E6B, P1E6C, P1E6E, P1E6F, P1E70, P1E71, P1E72, P1E73, P1E74, P1E75, P1E76, P1E77, P1E78, P1E79, P1E7A, P1E7B, P1E7C, P1E7D, P1E7E, P1E7F, P1E80, P1E81, P1E82, P1E83, P1E84, P1E86, P1E87, P1E88, P1E89, P1E8A, P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B55, P0B5A, P0B5F, P0B64, P0B69, P0B6E, P0B73, P0B78, P0B7D, P0B82, P0B87, P0B8C, P0B91, P0B96, P0B9B, P0BA0, P0BA5, P0BAA, P0BAF, P0BB4, P0BB9, P1B16, P1B19, P1B1C, P1B1F, P1B22, P1B25, P1B45, P1B48, P1B4B, P1B4E, P1B51, P1B54, P1B57, P1B5A, P1B5D, P1B60, P1B63, P1B66, P1B69, P1B6C, P1B6F, P1B72, P1B75, P1B78, P1B7B, P1B7E, P1B81, P1B84, P1B87, P1B8A, P1B8D, P1B90, P1B93, P1B96, P1B99, P1B9C, P1B9F, P1BA2, P1BA5, P1BA8, P1BAB, P1BAE, P1BB1, P1BB4, P1BB7, P1BBA, P1BBD, P1BC0, P1BC3, P1BC6, P1BC9, P1BCC, P1BCF, P1BD2, P1BD5, P1BD8, P1BDB, P1BDE, P1BE1, P1BE4, P1BE7, P1BEA, P1BED, P1BF0, P1BF3, P1BF6, P1BF9, P1BFC, P1E01, or P1E04
* The hybrid/EV powertrain control module 2 and battery energy control module are awake and communicating.
Conditions for Setting the DTC
The difference between the maximum cell voltage in the Hybrid/EV Battery and the minimum cell voltage in the Hybrid/EV Battery is greater than 0.3 V.
Action Taken When the DTC Sets
* DTC P0BBE is a type B DTC.
* The vehicle will operate in a reduced power mode and electric only engine ON.
* If additional fault conditions occur, this may cause the contactors to open at anytime.
Conditions for Clearing the DTC
* DTC P0BBE is a type B DTC.
* The Clear Secured High Voltage DTCs Reading and Clearing Diagnostic Trouble Codes reset function must be performed to prevent resetting the DTC.
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics Hybrid Energy Storage Schematics
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Drive Motor Battery System Description Drive Motor Battery System Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
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
Special Tools
EL-48900 - HEV Safety Kit
EL-48571 - High Voltage Battery Pin Out Box
For equivalent regional tools, refer to Special Tools Tools and Equipment.
Circuit/System Verification
Vehicle in Service Mode, observe the scan tool Hybrid Battery 1-96 parameters. Each reading should be between 3.0-4.1 V, and all readings should be within 0.1 V of each other.
Circuit/System Testing
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 condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.
Failure to follow the procedures exactly as written may result in serious injury or death.
Danger: The Volt Battery Pack will utilize an exchange program. Please consult the most recent revision of bulletin/PI #PIP4841, available in Service Information (SI), for a list of approved Volt Battery Pack service procedures. Components that may be removed and serviced without exchanging the complete battery pack are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
Note: Use the schematics to identify the correct drive motor battery interface control module and battery section.
1. Verify that DTC P1E92, P1E98, P1E9E, P1EA4, U2603, U2604, U2605, U2606, or U2401 is not set
• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Vehicle OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling High Voltage Disabling High Voltage Disabling.
3. Disconnect the appropriate drive motor battery interface control module harness connector.
4. Connect the EL-48571 high voltage battery pin out box.
5. Insert the DMM probes into the EL-48571 test cavities.
Note:
* The DMM must be set to the DC voltage setting.
* Depending on the cell group not all 22 switch positions of the EL-48571-25 will be used.
* If working with battery section 2 the high voltage manual disconnect will need to be installed to insure proper cell group readings.
6. Measure and record the voltage of each of the cell groups in each battery section by cycling the EL-48571 through each of the 22 switch positions.
7. Each cell group voltage reading should be between 3.0-4.1 V.
• If not within the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A4 hybrid/EV battery pack.
8. Each cell group voltage reading should be within 0.1 V of each other.
• If not within the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A4 hybrid/EV battery pack.
9. If all circuits test normal, replace the appropriate hybrid/EV battery interface control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Drive Motor Battery Replacement and Shipping Preparation Procedures
* Control Module References Programming and Relearning for hybrid/EV battery interface control module replacement, programming and setup