CHARGING SYSTEM, Diagnostic DTC:P16027B

DTC Code DTC Name
P16027B Deterioration of Battery Low Fluid Level

DESCRIPTION

The ECM determines the battery status according to the voltage of the BATT terminal while the engine is running (not cranking).

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

Battery capacity is low for 10 seconds or more when the engine is running (not cranking).

(1 trip detection logic)

  • Battery

  • Wire harness or connector

 Charge warning light does not come on DTC stored SAE Code: P1602

WIRING DIAGRAM

B005NM0E15
*a from Battery
*b EFI-MAIN

CAUTION / NOTICE / HINT

Note

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

Tech Tips

If any DTCs other than P16027B are output, troubleshoot those DTCs first.

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. Disconnect the A46 ECM connector.

    2. B005Q16C09
      *a

      Front view of wire harness connector

      (to ECM)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A46-1 (BATT) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR