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 a DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P1602

Deterioration of Battery

Battery voltage is 11.85 V or less for 10 seconds or more when the engine is running (60 seconds elapses after the engine is started)

(1 trip detection logic)

  • Battery

  • Wire harness or connector

  • EFI-MAIN NO. 1 fuse

  • EFI NO. 3 fuse

Does not come on

DTC stored

WIRING DIAGRAM

A298733E02

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1602)

    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 P1602 is output

      DTC P1602 and other DTCs are output
      Tip:

      If any DTCs other than P1602 are output, troubleshoot those DTCs first.

    DTC P1602 and other DTCs are output

    GO TO DTC CHART (FOR ECD SYSTEM)

    Click hereClick here

    DTC P1602 is output

  2. INSPECT CHARGING SYSTEM

    1. Check the charging system.

      Click hereClick here

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (BATT POWER SOURCE)

    1. A299850C01

      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the A61 ECM connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A61-2 (BATT) - Body ground

      Always

      11 to 14 V

    Result

    Result

    OK

    NG
    OK

    CHECK FOR INTERMITTENT PROBLEMS

    Click hereClick hereClick hereClick hereClick hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR