CHARGING SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

The ECM monitors the battery. When the engine is running (not cranking) and the battery voltage drops below a specified level, the ECM determines that there is battery deterioration and stores this DTC.

DTC Code DTC Detection Condition Trouble Area
P1602 Battery capacity is abnormally low for 10 seconds or more when the engine is running (not cranking) (1 trip detection logic).

  • Battery

  • Harness or connector

  • EFI MAIN fuse

WIRING DIAGRAM

A002M4OE03
*a from Battery
*b EFI MAIN

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Check for DTCs Click here.

      Result
      Result Proceed to
      Only DTC P1602 is output. A
      Other DTCs are output in addition to DTC P1602. B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. CHECK CHARGING SYSTEM


    1. Check the charging system Click here.


    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (BATT POWER SOURCE)


    1. Disconnect the A76 ECM connector.

    2. A002MI0E02
      Text in Illustration
      *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
      A76-1 (BATT) - Body ground Always 11 to 14 V

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR