CHARGING SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

The ECU determines the battery power according to the voltage of the AM21 terminal while the engine is running (not cranking).

DTC No. DTC Detection Condition Trouble Area
P1602

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

(1 trip detection logic)

  • Battery

  • Harness or connector

WIRING DIAGRAM

A011AZQE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system Click here.


    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the power management control ECU connector.

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

    3. w/o Entry and Start System

      Standard Voltage
      Tester Connection Condition Specified Condition
      D39-8 (AM21) - Body ground Always 11 to 14 V

    4. w/ Entry and Start System

      Standard Voltage
      Tester Connection Condition Specified Condition
      D38-2 (AM21) - Body ground Always 11 to 14 V
      D38-1 (AM22) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    USE SIMULATION METHOD TO CHECK Click here