Pinpoint Test Y: DTC P0B1B:00

High-Voltage Traction Battery

Pinpoint Test Y: DTC P0B1B:00

Refer to Wiring Diagram Set 12 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Charging System for schematic and connector information. Diagrams By Number

Normal Operation

The Battery Pack Sensor Module (BPSM) monitors battery pack voltage by measuring voltage within the High Voltage Traction Battery (HVTB). The BPSM then broadcasts the voltage value via the dedicated Controller Area Network (CAN) to the BECM. Normal pack voltage should be between 179-343 volts.

- P0B1B:00 (Hybrid Battery Pack Voltage Sense C Circuit Low: No Sub Type Information) - Fault is set when BPSM senses low voltage.

This pinpoint test is intended to diagnose the following:

- HVTB
- BPSM


PINPOINT TEST Y: DTC P0B1B:00

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Y1 RETRIEVE THE BECM DTCs

- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear DTCs - BECM.
- Enter the following diagnostic mode on the scan tool: Self Test - BECM.
- Are any DTCs other than P0B1B:00 retrieved?

Yes
REFER to the Battery Energy Control Module (BECM) DTC Chart and diagnose all other DTCs first. Battery Energy Control Module (BECM) DTC Chart

No
GO to Y2.

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Y2 INSTALL A NEW BPSM

- Ignition OFF.
- Install a new BPSM. Refer to Battery Pack Sensor Module (BPSM) Service and Repair.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear DTCs - BECM.
- Enter the following diagnostic mode on the scan tool: Self Test - BECM.
- Is DTC P0B1B:00 retrieved?

Yes
GO to Y3.

No
REPAIR is complete. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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Y3 INSTALL A NEW BECM

- Ignition OFF.
- Install a new BECM. Refer to Battery Energy Control Module (BECM) Service and Repair.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear DTCs - BECM.
- Enter the following diagnostic mode on the scan tool: Self Test - BECM.
- Is DTC P0B1B:00 retrieved?

Yes
INSTALL a new HVTB (includes HVTB system wire harness). REFER to High-Voltage Traction Battery High-Voltage Traction Battery. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
REPAIR is complete. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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