Pinpoint Test L: DTC P0A1F
High-Voltage Traction Battery
Pinpoint Test L: DTC P0A1F
Refer to Wiring Diagram Set 12, Charging System for schematic and connector information Electrical Diagrams.
Normal Operation
With the ignition switch in the ON position and the engine ON or OFF (the engine must have run at least once after the key was cycled to ON), the Battery Control Module - High Voltage Traction Battery (BCM-HVTB) monitors the current, voltage, temperature and leakage resistance of the 50 individual nickel metal hydride battery modules within the High Voltage Traction Battery (HVTB). The BCM-HVTB (Battery Control Module - High Voltage Traction Battery) also controls the contactors.
- DTC P0A1F (Battery Energy Control Module Has Internal Errors)- If there are any internal errors of the HVTB (High Voltage Traction Battery) caused by sensor failure, control module failure or other serious related faults internal to the HVTB (High Voltage Traction Battery) will cause the BCM-HVTB (Battery Control Module - High Voltage Traction Battery) to set this DTC.
This pinpoint test is intended to diagnose the following:
- Service disconnect plug
- HVTB (High Voltage Traction Battery)
PINPOINT TEST L : DTC P0A1F
WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
L1 CHECK THE SERVICE DISCONNECT PLUG
NOTE: Make sure the service disconnect plug is correctly inserted and locked into the lock position.
- Ignition OFF.
- Disconnect: Service Disconnect Plug.
- Inspect the service disconnect plug for physical or electrical damage. Make sure that the high-voltage fuse resistance is one ohm or less. If the high-voltage fuse is open, refer to DTC P0A95 for instructions Battery System, Hybrid Drive.
Is the service disconnect plug free of any damage?
Yes
GO to L2.
No
REFER to DTC P0A95 action in the Battery Control Module - High Voltage Traction Battery (BCM-HVTB) DTC Chart Battery System, Hybrid Drive.
L2 CHECK THE BCM-HVTB (Battery Control Module - High Voltage Traction Battery) DTCs
- Using the scan tool, clear the BCM-HVTB (Battery Control Module - High Voltage Traction Battery) DTCs.
- Cycle the ignition OFF then ON.
- Check the recorded BCM-HVTB (Battery Control Module - High Voltage Traction Battery) DTCs from the continuous and on-demand self tests.
Are any or all of the DTCs P0A8B, P0A8D, P0A8E also present?
Yes
GO to Pinpoint Test E Pinpoint Test E: DTCs P0A8B, P0A8D Or P0A8E.
No
GO to L3.
L3 CHECK FOR CORRECT BCM-HVTB (Battery Control Module - High Voltage Traction Battery) OPERATION
NOTE: This pinpoint test step only addresses the 40-pin connector for the BCM-HVTB (Battery Control Module - High Voltage Traction Battery). It is not necessary to disconnect the high-voltage connectors when following this pinpoint test step procedure.
- Disconnect BCM-HVTB (Battery Control Module - High Voltage Traction Battery) electrical connector C4227A.
- Check for:
- corrosion.
- pushed-out pins.
- Connect BCM-HVTB (Battery Control Module - High Voltage Traction Battery) electrical connector C4227A and make sure it seats correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new HVTB (High Voltage Traction Battery). REFER to High-Voltage Traction Battery . 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.