P0A7F

P112 HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A7F: Hybrid Battery Pack Deterioration

DTC P0A7F - Hybrid Battery Pack Deterioration

DESCRIPTION





The battery ECU calculates the SOC (state of charge) of the HV battery by estimating the amperage that flows into the HV battery and monitoring other values.
The battery ECU sends the calculated SOC to the hybrid vehicle control ECU. The hybrid vehicle control ECU charges and discharges the HV battery depending on driving patterns based on the information sent by the battery ECU.






MONITOR DESCRIPTION

The battery ECU calculates the resistance of the HV battery through amperage and voltage, and uses this resistance to determine the extent of deterioration of the HV battery. If the battery ECU detects that the resistance of the HV battery has exceeded the standard, it determines that malfunction has occurred. In addition, the battery ECU monitors the SOC, and if the difference between the maximum and minimum SOC values exceeds the standard, it determines that malfunction has occurred. When either of the malfunction detection conditions is met, the battery ECU illuminates the MIL and sets a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE

PROCEDURE

1. READ DTC OUTPUT (DTC P0A1F IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG) and the tester ON.
(c) Enter the following menus: Powertrain / HV Battery / DTC.
(d) Read DTCs.
Result:
DTC P0A1F is output
YES -- REPLACE BATTERY ECU
NO -- REPLACE HV SUPPLY BATTERY ASSEMBLY