Pinpoint Test B: DTC P0A7D:00

High-Voltage Traction Battery

Pinpoint Test B: DTC P0A7D:00

Refer to Wiring Diagram Set 12, Charging System for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

The Battery Energy Control Module (BECM) monitors the High Voltage Traction Battery (HVTB) state-of-charge. When voltage drops to a low level, the vehicle will shut down and/or will not start/re-start until the voltage level has been increased to a nominal level. This condition may occur if the vehicle has been stored for an extended period of time. The stop safely hazard (red triangle) warning indicator will illuminate and the vehicle will shut down and not re-start.

- P0A7D:00 (Hybrid Battery Pack State Of Charge Low: No Sub Type Information)- Fault sets when the ignition switch is first turned to the ON position, or when the ignition switch is in the START position and battery pack voltage falls below a threshold. Reports as a continuous memory (historical) DTC only.

This pinpoint test is intended to diagnose the following:

- HVTB (High Voltage Traction Battery)

PINPOINT TEST B : DTC P0A7D:00

B1 RETRIEVE ALL BECM (Battery Energy Control Module) DTCs

- Connect the scan tool.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self Test- BECM (Battery Energy Control Module).

Do any DTCs other than P0A7D: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 B2.

B2 MONITOR BECM (Battery Energy Control Module) PIDs HYBRID BATTERY MINIMUM BATTERY MODULE VOLTAGE (HEVMINVOLT) AND HYBRID BATTERY PACK VOLTAGE (BATPACKVOLT)

- Enter the following diagnostic mode on the scan tool: DataLogger- BECM (Battery Energy Control Module).

- Monitor BECM (Battery Energy Control Module) PIDs HEVMINVOLT and BATPACKVOLT.

Is HEVMINVOLT above 4.8 volts and/or BATPACKVOLT above 158 volts?

Yes
Concern not present at this time. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
INSTALL a new HVTB (High Voltage Traction Battery) (includes HVTB (High Voltage Traction Battery) system wire harness). REFER to High-Voltage Traction Battery . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.