Pinpoint Test E: DTC P0AFA:16

High-Voltage Converter/Inverter

Pinpoint Test E: DTC P0AFA:16

Refer to Wiring Diagram Set 12, Charging System for schematic and connector information. [1][2]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 (DC to DC Converter Control Module) 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 (DC to DC Converter Control Module) will be in standby mode (DC/DC (DC to DC Converter Control Module) 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 (DC to DC Converter Control Module) senses HVTB (High Voltage Traction Battery) voltage of less than 150 volts.

This pinpoint test is intended to diagnose the following:

- Identify subsystem which is source of HVTB (High Voltage Traction Battery) system fault

PINPOINT TEST E : DTC P0AFA:16

E1 CHECK FOR DC/DC (DC to DC Converter Control Module) DTC P0AFA:13

- Ignition ON.

- Connect the scan tool.

- Enter the following diagnostic mode on the scan tool: Self Test- DC/DC (DC to DC Converter Control Module).

Is DTC P0AFA:13 reported?

Yes
GO to Pinpoint Test D. Pinpoint Test D: DTC P0AFA:13

No
GO to E2.

E2 CHECK HIGH VOLTAGE TO THE TCM (Transmission Control Module) USING PID BATTERY VOLTAGE (TCM (Transmission Control Module)) RECEIVED (HVBAT_V)

- Enter the following diagnostic mode on the scan tool: DataLogger- TCM (Transmission Control Module).

- Monitor the TCM (Transmission Control Module) 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 Hybrid Drive Systems for diagnosis of the BECM (Battery Energy Control Module) DTCs. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.