Pinpoint Test E: DTC P0AFA:16
High-Voltage Converter/Inverter
Pinpoint Test E: DTC P0AFA:16
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 DC to DC Converter Control Module (DC/DC) monitors the high voltage available from the High Voltage Traction Battery (HVTB). If the DC/DC senses high voltage of less than 150 volts, it will set DTC P0AFA:16 and request the CHECK CHARGING SYSTEM message be displayed in the message center. The DC/DC will be in standby mode (DC/DC disabled) until the low-voltage condition clears, resulting in the 12-volt battery eventually becoming drained. Reduced or no functionality of 12-volt systems (headlamps, HVAC blower motor, etc.) may also be noticed.
- DTC P0AFA:16 (Hybrid Battery System Voltage Low: Circuit Voltage Below Threshold) - Sets when the DC/DC senses HVTB voltage of less than 150 volts.
This pinpoint test is intended to diagnose the following:
- Identify subsystem which is source of HVTB system fault
PINPOINT TEST E: DTC P0AFA:16
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E1 CHECK FOR DC/DC DTC P0AFA:13
- Ignition ON.
- Connect the scan tool.
- Enter the following diagnostic mode on the scan tool: Self Test - DC/DC.
- Is DTC P0AFA:13 reported?
Yes
GO to Pinpoint Test D. Pinpoint Test D: DTC P0AFA:13
No
GO to E2.
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E2 CHECK HIGH VOLTAGE TO THE TCM USING PID BATTERY VOLTAGE (TCM) RECEIVED (HVBAT_V)
- Enter the following diagnostic mode on the scan tool: DataLogger - TCM.
- Monitor the TCM PID HVBAT_V.
- Does the PID read greater than 150 volts?
Yes
GO to Pinpoint Test D. Pinpoint Test D: DTC P0AFA:13
No
CARRY OUT self-test of the Battery Energy Control Module (BECM). REFER to High Voltage Traction Battery Testing and Inspection for diagnosis of the BECM DTCs. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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