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

A347102E03

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).

      Table 1. Result

      Result

      Proceed to

      Only DTC P1602 is output.

      A

      Other DTCs are output in addition to DTC P1602.

      B

    GO TO DIAGNOSTIC TROUBLE CODE CHART

    (Click here)

  2. CHECK CHARGING SYSTEM

    1. Check the charging system (Click here).

    REPAIR OR REPLACE CHARGING SYSTEM

  3. CHECK HARNESS AND CONNECTOR (BATT POWER SOURCE)

    1. Disconnect the A76 ECM connector.

    2. U123364E02

      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
      Table 2. Text in Illustration

      *a

      Front view of wire harness connector

      (to ECM)

    USE SIMULATION METHOD TO CHECK

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR