Pinpoint Test AC: DTC B11D8:11

High-Voltage Traction Battery

Pinpoint Test AC: DTC B11D8:11

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 Energy Control Module (BECM) monitors the impact notification output from the Restraints Control Module (RCM). The RCM outputs a Pulse-Width Modulation (PWM) voltage on the circuit based on status. If an event is indicated, the BECM will initiate shutdown of the High Voltage Traction Battery (HVTB) system. If the BECM senses a fault on the circuit, it will illuminate the powertrain malfunction (wrench) warning indicator and set a DTC.

- B11D8:11 (Restraint Event Notification: Circuit Short to Ground) - This DTC sets when the BECM detects a short to ground on the event notification signal circuit for 5 seconds or more.

This pinpoint test is intended to diagnose the following:
- Fuel Pump (FP) control module
- RCM
- BECM


PINPOINT TEST AC: DTC B11D8:11

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

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AC1 CHECK CIRCUIT FOR SHORT TO GROUND

- Ignition OFF.
- Disconnect: BECM C4237A.
- Disconnect: RCM C310A.
- Disconnect: FP Control Module C446.
- Measure the resistance of BECM C4237A-46, circuit CR167 (YE/VT), harness side to ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to AC2.

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

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AC2 CHECK BECM DTCs

- Connect: BECM C4237A.
- Connect: RCM C310A.
- 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.
- Is DTC B11D8:11 retrieved?

Yes
GO to AC3.

No
INSTALL a new FP control module. REFER to Fuel Charging and Controls - Hybrid Service and Repair. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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AC3 RETRIEVE BECM DTCs

- Ignition OFF.
- Disconnect: RCM C310A.
- 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 B11D8:11 retrieved?

Yes
GO to AC4.

No
INSTALL a new RCM. REFER to Supplemental Restraint System Service and Repair. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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AC4 CHECK FOR CORRECT BECM OPERATION

- Ignition OFF.
- Check the BECM harness and component side connectors for:

- corrosion.
- pushed-out/bent pins.
- Connect the BECM and make sure the connectors seat correctly.
- Connect: RCM C310A.
- Connect: Fuel Pump (FP) C446.
- Operate the system and determine if the concern is still present.
- Is the concern still present?

Yes
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.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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