СИСТЕМА ЗАРЯДКИ ДВИГАТЕЛЯ, Diagnostic DTC:P1550, P1551, P1552

DTC Code DTC Name
P1550 Battery Current Sensor Circuit
P1551 Battery Current Sensor Circuit Low
P1552 Battery Current Sensor Circuit High

DESCRIPTION

The battery current sensor assembly detects the battery charge and discharge current amount.

The battery current sensor assembly changes this information into a voltage signal and outputs it to the ECM.

Based on this signal, the ECM sends power generation voltage commands to the generator.

A01V8J8E05
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1550 Battery Current Sensor Circuit

Difference between the maximum and minimum current values of the battery current sensor is less than 1 A for 10 seconds or more

(1 trip detection logic)

  • Battery current sensor assembly

  • ECM

  • Wire harness or connector

 Does not come on DTC stored
P1551 Battery Current Sensor Circuit Low

Battery current sensor output value is abnormally low for 0.5 seconds or more with the ignition switch ON

(1 trip detection logic)

  • Battery current sensor assembly

  • ECM

  • Wire harness or connector

 Does not come on DTC stored
P1552 Battery Current Sensor Circuit High

Battery current sensor output value is abnormally high for 0.5 seconds or more with the ignition switch ON

(1 trip detection logic)

  • Battery current sensor assembly

  • ECM

  • Wire harness or connector

 Does not come on DTC stored

WIRING DIAGRAM

Refer to DTC P0516 and P0517.

Click here

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1550, P1551 OR P1552)


    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 / Trouble Codes.

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Proceed to
      DTC P1550, P1551 or P1552 is output
      DTC P1550, P1551 or P1552 and other DTCs are output

      Tech Tips

      If any DTCs other than P1550, P1551 or P1552 are output, troubleshoot those DTCs first.


    DTC P1550, P1551 or P1552 and other DTCs are output

    GO TO DTC CHART Click here

    DTC P1550, P1551 or P1552 is output

  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.


      Powertrain > Engine > Data List
      Tester Display
      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

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  3. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. Inspect the battery current sensor assembly.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

    OK

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


    1. Disconnect the B76 ECM connector.

    2. Disconnect the B72 battery current sensor assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      B76-77 (EIB) - B72-4 (E2) Always Below 1 Ω
      B76-75 (VCIB) - B72-2 (VC5) Always Below 1 Ω
      B76-116 (IB) - B72-3 (IB) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B76-77 (EIB) or B72-4 (E2) - Body ground Always 10 kΩ or higher
      B76-75 (VCIB) or B72-2 (VC5) - Body ground Always 10 kΩ or higher
      B76-116 (IB) or B72-3 (IB) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR