DTC P1A07, P1E93, P1E99, P1E9F or P1EA5
Diagnostic Instructions
DTC Descriptors
DTC P1A07: Battery Energy Control Module 5 V Reference Circuit
DTC P1E93: Hybrid/EV Battery Interface Control Module 1 5 V Reference Circuit
DTC P1E99: Hybrid/EV Battery Interface Control Module 2 5 V Reference Circuit
DTC P1E9F: Hybrid/EV Battery Interface Control Module 3 5 V Reference Circuit
DTC P1EA5: Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit
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 volts, for a nominal system voltage of 355 volts 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 to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 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 to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 cell groups. Voltage sense lines are attached to each individual cell group, 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 battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.
Conditions for Running the DTC
P1A07
| • | The battery energy control module is awake and communicating. |
| • | The 12 V battery voltage greater than or equal to 9 V. |
P1E93, P1E99, P1E9F, P1EA5
| • | Ignition cycles from ON to OFF. |
| • | The battery energy control module is awake and communicating. |
| • | No loss of communications between the battery energy control module and any of the hybrid/EV battery interface control modules. |
| • | The 2nd protection circuit diagnostic is not running. |
Conditions for Setting the DTC
P1A07
The battery energy control module has detected a fault on the internal 5 V reference circuit.
P1E93, P1E99, P1E9F, P1EA5
| • | The 2nd protection circuit diagnostic is not running. |
| • | A hybrid/EV battery interface control module has detected a fault on the internal 5 V reference circuit. |
Action Taken When the DTC Sets
| • | DTCs P1A07 P1E93, P1E99, P1E9F, or P1EA5 are type B DTCs. |
| • | If any of these DTCs are set, the vehicle will operate in a reduced power mode and electric only engine ON. |
Conditions for Clearing the DTC
DTCs P1A07 P1E93, P1E99, P1E9F, or P1EA5 are type B DTCs.
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
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
EL-48900 HEV Safety Kit
For equivalent regional tools, refer to Special Tools .
Circuit/System Verification
Danger: High voltage enabling and disabling shall be only performed by High Voltage Qualified Technicians. The procedures for high-voltage enabling/disabling can be found in the service instructions and must be strictly followed at all times. The usage of the Protocol High Voltage Disabling/Enabling is mandatory. The High-Voltage Qualified Technician is responsible for the adherence to the manufacturer's service instructions as well as current national legal regulations.
Failure to follow the procedures exactly as written may result in serious injury or death.
Questions regarding training can be answered by your national training centre.
Danger: Any hybrid/EV battery pack replacement shall be performed by High-Voltage Qualified Technicians only. The replacement procedure can be found in the service instruction and must be strictly followed at all times. The High-Voltage Qualified Technician is responsible for adherence to the manufacturer's service instructions as well as current national legal regulations. If the hybrid/EV battery pack needs to be replaced contact the Technical Assistance Centre for further instructions prior to removal of the battery pack.
If DTC P1A07, P1E93, P1E99, P1E9F, or P1EA5 is set, replace the A4 hybrid/EV battery pack.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
| • | Control Module References for battery energy control module replacement and hybrid battery interface control modules 1-4, programming and set-up for the hybrid/EV battery pack replacement. |
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