P0AC0-817

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0AC0-817: Hybrid Battery Pack Current Sensor Circuit Range / Performance
P0AC0-817 - Hybrid Battery Pack Current Sensor Circuit Range / Performance

DESCRIPTION

- The battery current sensor, which is located in the HV battery junction block on the positive side of the HV battery, detects the amperage that flows to and from the HV battery. The battery smart unit receives a voltage of between 0 and 5 V that is in proportion to the amperage flowing in the cable. This voltage goes into the IB terminal from the battery current sensor. A battery current sensor output voltage below 2.5 V indicates that the HV battery is being discharged, and a voltage above 2.5 V indicates that the HV battery is being charged. The hybrid vehicle control ECU determines the amount of either charge or discharge amperage that is being received by the HV battery assembly based on the signals that are input to terminal IB of the battery smart unit from the battery current sensor. The hybrid vehicle control ECU also calculates the SOC (state of charge) of the HV battery based on the accumulated amperage.









MONITOR DESCRIPTION

The hybrid vehicle control ECU detects malfunction of the battery current sensor, through monitored generator and motor torque. If the hybrid vehicle control ECU detects a battery current sensor malfunction, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the power switch off.

5. Turn the power switch on (READY) and turn the Techstream on.

6. Perform the universal trip.

7. Enter the following menus: Powertrain / HV / Trouble Codes.

8. Check that the permanent DTCs are cleared.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:





B -- GO TO DTC CHART Hybrid Battery System
A -- Continue to next step.

2. REPLACE HV BATTERY JUNCTION BLOCK

(a) Replace the HV battery junction block Components.

NEXT -- Continue to next step.

3. CLEAR DTC

(a) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(b) Read and record the DTCs and freeze frame data.

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Clear DTCs and freeze frame data.

NEXT -- Continue to next step.

4. PERFORM A ROAD TEST

(a) Perform a road test.

NEXT -- Continue to next step.

5. CHECK DTC OUTPUT (HV)

(a) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(b) Check if DTCs are output.

Result:





B -- REPLACE BATTERY SMART UNIT Components

A -- COMPLETED