Pinpoint Test V: DTC P0AFB:00

High-Voltage Traction Battery

Pinpoint Test V: DTC P0AFB: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

During vehicle operation, the High Voltage Traction Battery (HVTB) normal operating voltage range is between 179-343 volts. The electrical system is monitored by the Battery Energy Control Module (BECM) and Battery Pack Sensor Module (BPSM). As the voltage is used in the HVTB, a request to charge the battery is sent on the High Speed Controller Area Network (HS-CAN) to the Electronically Controlled Continuously Variable Transmission (eCVT) to send voltage to the battery to charge the battery and bring the operating voltage back to peak operating conditions. If battery voltage becomes too high, an over-charge condition is indicated. When battery voltage is too high, the stop safely hazard (red triangle) warning indicator is illuminated and the vehicle will shut down.

- P0AFB:00 (Hybrid Battery System Voltage High: No Sub Type Information) - Fault sets if the HVTB voltage is high for 10 seconds or more.

This pinpoint test is intended to diagnose the following:

- BECM
- BPSM


PINPOINT TEST V: DTC P0AFB:00

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V1 RETRIEVE ALL BECM DTCs

- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - BECM.
- Do any DTCs other than P0AFB:00 exist?

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 V2.

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V2 MONITOR BECM PID HYBRID BATTERY PACK VOLTAGE (BATPACKVOLT)

- Monitor BECM PID BATPACKVOLT.
- Is PIDs BATPACKVOLT below 344 volts?

Yes
INSTALL a new BPSM. REFER to Battery Pack Sensor Module (BPSM) Service and Repair. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
INSTALL a new BECM. REFER to Battery Energy Control Module (BECM) Service and Repair. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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