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)


  • Charging system

  • Power management control ECU battery power source circuit

WIRING DIAGRAM

A01VDPDE04
*1 ECU-B NO. 2
*2 MAIN
*3 Battery
*4 Power Management Control ECU

CAUTION / NOTICE / HINT

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

    A01VJV7E01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Power Management Control ECU)


    1. Disconnect the F74 power management control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F74-8 (AM21) - Body ground Always 11 to 14 V

    OK
    NG