Hybrid Control System

L110 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 relay assembly 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 charged, and a voltage above 2.5 V indicates that the HV battery is being discharged. 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.









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 Vehicle Control System - L110
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) 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. 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