Pinpoint Test B: DTC B1317

Smart Junction Box (SJB)

Pinpoint Test B: DTC B1317

Refer to Wiring Diagram Set 13 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Power Distribution/SJB for schematic and connector information. Diagrams By Number

Normal Operation
- DTC B1317 (Battery Voltage High) - a continuous and on-demand DTC that sets when the SJB detects battery voltage above 15.5 volts.

This pinpoint test is intended to diagnose the following:

- Charging system concern
- SJB


PINPOINT TEST B: DTC B1317

NOTE: DTC B1317 may be stored in the module memory due to previous battery charging or vehicle jump starting events.

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B1 CHECK FOR DTC B1317, B1676 OR P0563 SET IN OTHER MODULES

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: (All Modules) Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC B1317, B1676 or P0563 (PCM) set in more than one module?

Yes
REFER to Charging System Testing and Inspection to diagnose an overcharging condition.

No
GO to B2.

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B2 CHECK THE BATTERY VOLTAGE

- Turn off all interior/exterior lights and accessories.
- Start and run the engine at approximately 2,000 rpm for 3 minutes while monitoring the battery voltage.
- Does the battery voltage rise to 15.5 volts or higher?

Yes
REFER to Charging System Testing and Inspection to diagnose an overcharging condition.

No
GO to B3.

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B3 RECHECK FOR DTC B1317

- Turn the engine off.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB Self-Test.
- Clear the continuous memory DTCs.
- Carry out the SJB self-test.
- Is DTC B1317 present?

Yes
INSTALL a new SJB. REFER to Smart Junction Box (SJB) Service and Repair. TEST the system for normal operation.

No
The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

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