DTC P0AC1, P0AC2, P0B10, P0B11, P0B13, P1EBA or P1EBB
Diagnostic Instructions
DTC Descriptors
DTC P0AC1: Hybrid/EV Battery Low Resolution Current Sensor Circuit Low Voltage
DTC P0AC2: Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage
DTC P0B10: Hybrid/EV Battery High Resolution Current Sensor Circuit Low Voltage
DTC P0B11: Hybrid/EV Battery High Resolution Current Sensor Circuit High Voltage
DTC P0B13: Hybrid/EV Battery Low Resolution Current Sensor High Resolution Current Sensor Not Plausible
DTC P1EBA: Hybrid/EV Battery Low Resolution Current Sensor Exceeded Learning Limit
DTC P1EBB: Hybrid/EV Battery High Resolution Current Sensor Exceeded Learning Limit
Circuit/System Description
The hybrid/EV battery current sensor is mounted inside the hybrid/EV battery pack. The positive high-voltage cable that goes to the positive contactor relay passes through the hybrid/EV battery pack current sensor. The hybrid/EV battery pack current sensor detects the amperage that flows in and out of the hybrid/EV batteries. The battery energy control module supplies and monitors a 5 V reference signal to the hybrid/EV battery pack current sensor. The hybrid/EV battery pack current sensor returns a signal between 0 and 5 V to the battery energy control module. The hybrid/EV battery pack current sensor signal is in proportion to the amperage going in and out of the hybrid/EV battery pack. A signal voltage of the hybrid/EV battery pack current sensor greater than 2.5 V indicates that the hybrid/EV battery is being charged and a signal voltage less than 2.5 V indicates discharging. The hybrid/EV battery pack current sensor has 2 measurement ranges in order to maintain accuracy. The ranges are low resolution and high resolution. The measurement ranges of the hybrid/EV battery pack current sensor have some overlap with each other. The high resolution measures from -23 to +23 A. The low resolution measures from -470 to +280 A.
Conditions for Running the DTC
P0AC1, P0AC2, P0B10 and P0B11
| • | The 12 V battery voltage is greater than or equal to 9 V. |
| • | The battery energy control module is awake and communicating. |
P0B13
| • | The hybrid/EV battery low-resolution current sensor or the hybrid/EV battery high-resolution current sensor value is between -20 and +20 A. |
| • | None of the following DTCs are set: P0AC1, P0AC2, P1EBA and P1A07, P0B10, P0B11, P1EBB. |
P1EBA and P1EBB
| • | Runs during battery energy control module initialisation. |
| • | The 12 V battery voltage is greater than or equal to 9 V. |
| • | The high-voltage main and charger contactors are open (during wake-up). |
Conditions for Setting the DTC
P0AC1
The battery energy control module detects that the hybrid/EV battery pack current sensor low resolution is less than -470 A.
P0AC2
The battery energy control module detects that the hybrid/EV battery pack current sensor low resolution is greater than +280 A.
P0B10
The battery energy control module detects that the hybrid/EV battery pack current sensor high resolution is less than -23 A.
P0B11
The battery energy control module detects that the hybrid/EV battery pack current sensor high resolution is greater than +23 A.
P0B13
The difference between the Hybrid/EV Battery's low-resolution current sensor value and its high-resolution current sensor value is greater than 10 A.
P1EBA
The battery energy control module detects that the Pack Current Low-Resolution Offset is greater than the calibration Low- Resolution Offset of 8 A.
P1EBB
The battery energy control module detects that the Pack Current High-Resolution Offset is greater than the calibration High- Resolution Offset of 2.5 A.
Action Taken When the DTC Sets
| • | DTC P0AC1, P0AC2, P0B10, P0B11, P0B13, P1EBA and P1EBB are type A DTCs. |
| • | The driver information centre (DIC) displays the SERVICE HYBRID SYSTEM message. |
| • | If any of these DTCs are set, the vehicle will operate in a reduced power mode and electric only engine ON. |
| • | The contactors may open at any time. |
Conditions for Clearing the DTC
DTC P0AC1, P0AC2, P0B10, P0B11, P0B13, P1EBA and P1EBB are type A 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 |
| • | EL-50211 Low-Voltage Jumper Harness Extension |
For equivalent regional tools, refer to Special Tools .
Circuit/System Verification
Ignition ON, observe the scan tool Hybrid/EV Battery Pack Low Resolution Current Sensor parameter. The reading should be between -470 and +280 A, and change with the amount of current draw on the hybrid/EV battery pack. Observe the scan tool Hybrid/EV Battery Pack High-Resolution Current Sensor parameter. The reading should be between -23 and +23 A, and change with the amount of current draw on the hybrid/EV battery pack. Typical current sensor reading in a parked vehicle with the ignition ON and all accessories OFF, is between 1 and 10 A.
Circuit/System Testing
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.
- Verify that no other DTCs are set.
- If DTC P0AC1, P0AC2, P0B10, P0B11, P0B13, P1EBA or P1EBB 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, programming and set-up for the hybrid/EV battery pack replacement. |
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