P0B7E

DTC P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D, P0B92, P0B97, or P0B9C

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0B3D
- Hybrid Battery 1 Circuit Low voltage

DTC P0B42
- Hybrid Battery 2 Circuit Low voltage

DTC P0B47
- Hybrid Battery 3 Circuit Low voltage

DTC P0B4C
- Hybrid Battery 4 Circuit Low voltage

DTC P0B51
- Hybrid Battery 5 Circuit Low voltage

DTC P0B56
- Hybrid Battery 6 Circuit Low voltage

DTC P0B5B
- Hybrid Battery 7 Circuit Low voltage

DTC P0B60
- Hybrid Battery 8 Circuit Low voltage

DTC P0B65
- Hybrid Battery 9 Circuit Low voltage

DTC P0B6A
- Hybrid Battery 10 Circuit Low voltage

DTC P0B6F
- Hybrid Battery 11 Circuit Low voltage

DTC P0B74
- Hybrid Battery 12 Circuit Low voltage

DTC P0B79
- Hybrid Battery 13 Circuit Low voltage

DTC P0B7E
- Hybrid Battery 14 Circuit Low voltage

DTC P0B83
- Hybrid Battery 15 Circuit Low voltage

DTC P0B88
- Hybrid Battery 16 Circuit Low voltage

DTC P0B8D
- Hybrid Battery 17 Circuit Low voltage

DTC P0B92
- Hybrid Battery 18 Circuit Low voltage

DTC P0B97
- Hybrid Battery 19 Circuit Low voltage

DTC P0B9C
- Hybrid Battery 20 Circuit Low voltage

Diagnostic Fault Information






Typical Scan Tool Data






Circuit/System Description

The hybrid battery assembly consists of 40 individual batteries. Each battery is rated at 7.2 volts. The batteries are connected together in series circuit. The battery energy control module (BECM) monitors the hybrid battery voltage on every two batteries for a total of 20 locations, across the battery assembly. If a hybrid battery voltage measurement drops below a calculated value, this DTC will set.

Conditions for Running the DTC

* The vehicle power mode is RUN.
* Accessory voltage is 9-18 volts.

Conditions for Setting the DTC

When any hybrid battery voltage measurement value is below 2 volts for 3 out of 4 seconds, this DTC will set.

Action Taken When the DTC Sets

DTCs P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D, P0B92, P0B97, and P0B9C are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D, P0B92, P0B97, and P0B9C are Type B DTCs.

Special Tools

* EL-48571 High Voltage Battery Pin Out Box
* EL-48900 HEV Safety Kit

Circuit/System Verification

1. Ignition ON, with a scan tool, monitors all 1 through 20 hybrid battery voltage parameters. All hybrid battery voltage parameters should be within 11-19 volts.
2. Operate the vehicle within the Conditions for Running the DTCs. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

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.

Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling.

1. Remove the drive motor generator battery cover.
2. Disconnect the X4 harness connector at the BECM.
3. Connect the EL-48571 high voltage battery pin out box to the X4 harness connector.
4. Install the high voltage manual disconnect lever.
5. Test for 11-19 volts across all 20 battery voltage reference circuits.

^ If not within the specified range, replace the drive motor battery assembly.

6. If all circuits test normal, replaced the BECM.

Repair Instructions

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

* Drive Motor Generator Battery Replacement
* Drive Motor Generator Battery Control Module and Bracket Replacement