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

B00456ME03

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

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. SYSTEM CHECK


    1. Check the vehicle specifications.

      Result
      Result Proceed to
      w/o Stop and Start System A
      w/ Stop and Start System B

    B

    CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROLECU) Click here

    A

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

    B0047K9E01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Power Management Control ECU)

    1. Disconnect the 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

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROLECU)


    1. B0045KFE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the 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
      F130-8 (AM21) - Body ground Always 11 to 14 V

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR