CHARGING SYSTEM, Diagnostic DTC:P16027B

DTC Code DTC Name
P16027B Deterioration of Battery Low Fluid Level

DESCRIPTION

The battery state sensor assembly detects the battery voltage. The battery condition is calculated from the voltage when the engine is running (except when cranking) and then output to the ECM. A DTC is output when battery degradation is determined based on this signal.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P16027B Deterioration of Battery Low Fluid Level

Diagnosis condition: Engine running (except when cranking)

Malfunction status: Battery capacity is abnormally low for 10 seconds or more.

Other: 1 trip

  • Battery

  • Wire harness or connector

 Not displayed DTC stored SAE: P1602

WIRING DIAGRAM

Refer to DTC P058A01 (Battery Monitor Module General Electrical Failure).

Click here

CAUTION / NOTICE / HINT

Note


  • When P058A01 (Battery Monitor Module General Electrical Failure) is output at the same time, perform the inspection for P058A01 (Battery Monitor Module General Electrical Failure) first.

    Click here

  • When P162B87 (Lost Communication with Battery Monitor Module Missing Message) is output at the same time, perform the inspection for P162B87 (Lost Communication with Battery Monitor Module Missing Message) first.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION


    1. Check the installation condition of the battery state sensor assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    INSTALL BATTERY STATE SENSOR ASSEMBLY CORRECTLY Click here

    OK

  2. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B0057MCC06
      *a

      Front view of wire harness connector

      (to Battery state sensor assembly)

      Disconnect the A11 battery state sensor assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A11-1 (AM21) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR