P057B
DTC P057B-P057E
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 Descriptors
DTC P057B
-
Brake Pedal Position Sensor Performance
DTC P057C
-
Brake Pedal Position Sensor Circuit Low Voltage
DTC P057D
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Brake Pedal Position Sensor Circuit High Voltage
DTC P057E
-
Brake Pedal Position Sensor Circuit Erratic
Diagnostic Fault Information
Circuit/System Description
The generator control module also called the starter generator control module is comprised of the following three control modules; the hybrid powertrain control module, 14 volt power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.
The brake pedal position (BPP) sensor is used to sense the action of the driver application of the brake pedal. The BPP sensor provides an analog voltage signal that will increase as the brake pedal is applied. The BBP sensor contains two independent sensor assemblies. The hybrid powertrain control module located in the generator control module, and the body control module are connected to their respective sensor assembly. Each module provides a low reference signal and a 5-volt reference voltage to their respective BPP sensor. The hybrid powertrain control module also monitors the PRNDL state for inferred brake pedal application when transitioning in and out of the Park position.
Conditions for Running the DTC
* Ignition voltage must be greater than 10 V.
* Drive motor control and hybrid powertrain control module are awake.
P057B
* Vehicle speed is greater than 5 km/h (3 mph).
* Transmission is not in Park.
* Accelerator pedal position less than 5 percent.
* DTCs P0722, P0723, P077C, P077D, U0101, U0073, P182E, P1915, P2122, P2123, P2127, P2128 or P2138 not set.
Conditions for Setting the DTC
DTC P057B
The hybrid powertrain control module detects no change in brake pedal position after brake applied.
DTC P057C
* The hybrid powertrain control module detects a short to voltage in the BPP sensor 5 V reference circuit.
* The hybrid powertrain control module detects a short to ground or an open/high resistance in the BPP sensor 5 V reference circuit.
* The hybrid powertrain control module detects a short to ground or an open/high resistance in the BPP sensor signal circuit.
DTC P057D
* The hybrid powertrain control module detects a short to voltage in the BPP sensor signal circuit.
* The hybrid powertrain control module detects an open/high resistance in the BPP sensor low reference circuit.
DTC P057E
The hybrid powertrain control module detects the BPP sensor signal is changing faster than possible under normal operating conditions.
Actions Taken When the DTC Sets
* The hybrid powertrain control module disables the following functions: Autostop, Autostart, and Regenerative Braking.
* DTC P057B is a type A DTC.
* DTCs P057C-P057E are type B DTCs.
Conditions for Clearing the DTC
* DTC P057B is a type A DTC.
* DTCs P057C-P057E are type B DTCs.
Diagnostic Aids
P057B
Inspect the connector at the Brake Pedal Position sensor for a high resistance connection.
Reference Information
Schematic Reference
Exterior Lights Schematics Exterior Lights Schematics
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
* Exterior Lighting Systems Description and Operation Exterior Lighting Systems
* Starter Generator Description and Operation Starter Generator Description and Operation
* Generator Control Module Description and Operation Generator Control Module Description and Operation
* Hybrid Modes of Operation Description Hybrid Modes of Operation 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
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Testing
DTC P057C and P057D
1. Verify that DTC P0562 or P0563 is not set.
• If DTC P0562 or P0563 is set, refer to DTC B1325, B1330, B1420, B1424, B1517, C0800, C0895, C0899, C0900, C12E1, C12E2, P0560, P0562, or P0563 Engine Electrical- Hybrid (HP6) for Hybrid (HP6).
2. Ignition OFF, disconnect the harness connector at the B22 brake pedal position sensor.
3. Ignition ON, verify that a test lamp illuminates between B+ and the low reference circuit terminal 5.
• If the test lamp does not illuminate, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K59 starter generator control module.
4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 6 and ground.
• If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K59 starter generator control module.
• If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K59 starter generator control module.
5. Test for less than 0.3 V between the signal circuit terminal 4 and ground.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K59 starter generator control module.
6. Test for 4.8-5.2 V between the 5 V reference circuit terminal 6 and the signal circuit terminal 4.
• If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K59 starter generator control module.
7. Ignition OFF, disconnect the X2 harness connector at the K59 starter generator control module.
8. Test for infinite resistance between the signal circuit terminal 4 and ground.
• If less than the specified range, test the signal circuit for a short to ground.
9. If all circuits test normal, replace the B22 brake pedal position sensor.
DTC P057B
Operate the vehicle within the Conditions for Running and Setting the DTC and verify the DTC does not reset.
If DTC P057B resets as current, replace the B22 brake pedal position sensor.
DTC P057E
1. Replace the brake pedal position sensor.
2. Perform the brake pedal position sensor calibration procedure. Refer to Brake Pedal Position Sensor Calibration Testing and Inspection.
3. Operate the vehicle within the Conditions for Running and Setting the DTC and verify the DTC does not reset.
• If DTC P057E resets as current, replace the K59 starter generator control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Brake Pedal Position Sensor Calibration Testing and Inspection
* Brake Pedal Position Sensor Replacement Service and Repair
* Control Module References Programming and Relearning for Generator Control Module, also called the Starter Generator Control Module, replacement, programming and setup