Hybrid Battery System

P310 HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0AC0: Hybrid Battery Pack Current Sensor Circuit Range/Performance

DTC P0AC0 - Hybrid Battery Pack Current Sensor Circuit Range/Performance

DESCRIPTION
- The battery current sensor, which is mounted on the positive cable side of the HV battery, detects the amperage that flows into the HV battery. The battery smart unit inputs a voltage, which varies between 0 and 5 V in proportion to the amperage, into the IB terminal from the battery current sensor. An output voltage of the battery current sensor below 2.5 V indicates that the HV battery is being charged, and above 2.5 V indicates that the HV battery is being discharged. The HV control ECU determines the charging and discharging amperage of the HV battery based on the signals that are input to its IB terminal from the battery smart unit, and calculates the SOC (state of charge) of the HV battery through the accumulated amperage.











MONITOR DESCRIPTION

If the battery smart unit detects a malfunction in the battery current sensor, the HV control ECU illuminates the MIL and sets a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





WIRING DIAGRAM





INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.
HINT: At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTCs Hybrid Battery System.
Result:






B -- GO TO DTC CHART (P0A1F)
A -- Continue to next step.
2. REPLACE HV RELAY ASSEMBLY
(a) Replace the HV relay assembly. Components

NEXT -- Continue to next step.
3. CLEAR DTC
(a) Install the battery cover. Components

(b) Connect Techstream to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(e) (*) Clear DTCs and freeze frame data.
(f) Perform a driving test.
HINT: Turn the ignition switch off and perform a driving test again after the first driving test for 2 trip detection.

NEXT -- Continue to next step.
4. CHECK DTC OUTPUT (DTC IS NOT OUTPUT AGAIN)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTCs Hybrid Battery System.
Result:






B -- REPLACE BATTERY SMART UNIT
A -- COMPLETED