CHARGING SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

The generator control ECU assembly monitors battery conditions. If the voltage drops below a certain value while the engine is running (not cranking), the generator control ECU assembly determines the battery is deteriorated and stores this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P1602

Deterioration of Battery

Battery capacity is abnormally 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

WIRING DIAGRAM

Refer to System Diagram.

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CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK CHARGING SYSTEM

    1. Check the charging system.

      Click here

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

    1. E259223C02

      *a

      Front view of wire harness connector

      (to Generator Control ECU Assembly)

      Disconnect the A52 generator control ECU assembly connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A52-5 (AM21) - Body ground

      Always

      11 to 14 V

    Result

    Result

    OK

    NG
    OK

    CHECK FOR INTERMITTENT PROBLEMS

    Click hereClick hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR