justanswer 1870021 DTC P0BBD Hybrid Energy Storage Operating instructions
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DTC P0BBD (HYBRID ENERGY STOR...
DTC P0BBD (HYBRID ENERGY STORAGE) Document ID# 1870021
DTC P0BBD
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle (with HP2)Diagnostic System Check - Vehicle (without
HP2) prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P0BBD: Hybrid Battery Pack Voltage Variation High
Circuit/System Description
The system contains twenty battery modules. Each module contains two 7.2 V cells for a total nominal system
voltage of 288 V. Each battery module is rated at 14.4 V direct current (DC) and all the modules are connected
together in series. The drive motor generator battery is also referred to as the hybrid battery. The drive motor
generator battery control module is also referred to as the battery energy control module (BECM). The drive motor
generator battery control module monitors the hybrid battery voltage on the twenty battery modules. The drive
motor generator battery control module determines the actual terminal voltage by monitoring the output voltage
from the high voltage contactor.
The drive motor generator battery control module will diagnose its own systems and determine when a fault
condition is present. Diagnostics and system status is communicated from the drive motor generator battery
control module to the hybrid powertrain control module (HPCM) through serial data. The hybrid powertrain control
module is the host controller for diagnostic trouble code (DTC) information.
Conditions for Running the DTC
DTC P0A1F is not set.
The ignition is ON.
The 12 V battery voltage is 9–18 V.
Minimum hybrid battery temperature is greater than -7°C (19.4°F).
Hybrid battery discharge current is greater than 0.2 A.
Conditions for Setting the DTC
The drive motor generator battery control module detects greater than a 1.5 V difference between any two hybrid
battery voltage measurements for 3 seconds. However, if any DTCs P0B3C–P0B9D are set, the corresponding
battery voltage measurement is ignored by this DTC.
Action Taken When the DTC Sets
DTC P0BBD is a type B DTC.
The drive motor generator battery control module sends a message to the hybrid powertrain control
module to reduce the power use limit to 3000 watts.
The driver information center (DIC) displays the SERVICE HYBRID SYSTEM message.
Conditions for Clearing the DTC
DTC P0BBD is a type B DTC.
The DTC will pass when the voltage of all hybrid batteries are within 1 V of each other.
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Drive Motor Battery System Description
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
EL-48571 High Voltage Battery Pin Out Box
EL-48900 HEV Safety Kit
Circuit/System Verification
Ignition ON, observe the scan tool Hybrid Battery 1–20 parameters. Each reading should be between 10–19 V, and
all readings should be within 1.5 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.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling.
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10–19 V.
XIf not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
XIf not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Drive Motor Battery Replacement and Shipping Preparation
Control Module References for drive motor generator battery control module replacement, setup and
programming.
"Portions of materials contained herein have been reprinted with permission of General Motors Corporation, Service
and Parts Operations" License Agreement #0410810.
Copyright 2007 - 2012 Service Repair Solutions, Inc.
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justanswer 1870021 DTC P0BBD Hybrid Energy Storage Operating instructions
- Type
- Operating instructions
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