CHARGING SYSTEM, Diagnostic DTC:P1530, P1531, P1532

DTC Code DTC Name
P1530 Short in Battery Current Sensor Circuit
P1531 Open in Battery Current Sensor Circuit
P1532 Battery Current Sensor Circuit

DESCRIPTION

A004KOUE15

The battery current sensor assembly installed on the negative (-) battery terminal detects the amount of current supplied from the generator.

The battery current sensor assembly changes current to voltage (at the negative (-) battery terminal) and sends it to the ECM. The ECM controls the voltage of the generator based on the signals from the battery current sensor assembly.

DTC No. DTC Detection Condition Trouble Area
P1530

  • Engine speed is 500 r/min or more, battery voltage is 10.9 V or more, and 1 second or more have elapsed after starting.

  • Battery current sensor output is less than 0.347 V, and duration of the malfunction is 0.5 seconds or more (1-trip detection logic).

  • Battery current sensor assembly

  • Open or short to GND in battery current sensor circuit

  • ECM
P1531

  • Engine speed is 500 r/min or more, battery voltage is 10.9 V or more, and 1 second or more have elapsed after starting.

  • Battery current sensor output is more than 4.653 V, and duration of the malfunction is 0.5 seconds or more (1-trip detection logic).

  • Battery current sensor assembly

  • Short to +B or VC in battery current sensor circuit

  • ECM
P1532

  • Ignition switch ON

  • Current sensor fixing diagnosis: The difference between the maximum and minimum current value when changing charging states is less than 0.07 V, and the charging state changes 10 times or more in succession when malfunctioning (1-trip detection logic).

  • Charging side properties diagnosis: After the alternator target DUTY has changed from 60% or more to less than 40%, with the alternator target DUTY is less than 40%, the battery voltage is less than 13.2 V and the battery current sensor voltage is 2.6 V or more and less than 5 V, and the duration of the malfunction is 30 seconds or more (1-trip detection logic).

  • Discharge side properties diagnosis: After the alternator target DUTY has changed from less than 40% to 60% or more, with the alternator target DUTY at 60% or more, the battery voltage is more than 13.7 V and the battery current sensor voltage is 0 V or more and less than 2.4 V and the duration of malfunction is 30 seconds or more (1-trip detection logic).

  • Battery current sensor assembly

  • Short in battery current sensor circuit

  • ECM

WIRING DIAGRAM

Refer to DTC P0516 Click here.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P1530, P1531, P1532)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / DTC.

    5. Read the DTC.

      Result
      Result Proceed to
      DTC P1530, P1531 and P1532 are output A
      DTC P1530, P1531, P1532 and other DTCs are output B

      Tech Tips

      If any DTCs other than P1530, P1531 and P1532 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING GTS (BATTERY CURRENT)


    1. Turn all of the electrical systems (headlights, blower motor, rear defogger, etc.) off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Data List / Battery Current.

      Result
      Result Proceed to
      Battery current is fixed at 0 A, or fluctuates by +/- 1 A or less between -100 and 100 A A
      Battery current fluctuates between -20 and 0 A B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. A004JWOE06
      Text in Illustration
      *a

      Component without harness connected

      (Battery Current Sensor Assembly)

      Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the A11 battery current sensor assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (VIN) - 3 (GND) Always 3 to 10 kΩ
      1 (VIN) - 4 (IB) Always Below 0.5 kΩ
      3 (GND) - 4 (IB) Always 3 to 10 kΩ

    4. Reconnect the cable to the negative (-) battery terminal.


    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR ASSEMBLY - ECM)


    1. Disconnect the A33 and A35 ECM connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A33-11 (IB) - A11-4 (IB) Always Below 1 Ω
      A35-22 (VCP2) - A11-1 (VIN) Always Below 1 Ω
      A35-30 (EPA2) - A11-3 (GND) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A33-11 (IB) or A11-4 (IB) - Body ground Always 10 kΩ or higher
      A35-22 (VCP2) or A11-1 (VIN) - Body ground Always 10 kΩ or higher
      A35-30 (EPA2) or A11-3 (GND) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR