CHARGING SYSTEM(w/ Battery Current Sensor), Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

The ECM determines the battery SOC (state of charge) according to the voltage of the BATT terminal while the engine is running (not cranking).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1602 Deterioration of Battery

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

(1 trip detection logic)

  • Battery

  • Wire harness or connector

 Does not come on DTC stored

WIRING DIAGRAM

B006O1WE08
*a from Battery
*b P/I
*c EFI-MAIN
*d EFI NO.1

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      Only DTC P1602 is output A
      DTC P1602 and other DTCs are output B

      Tech Tips

      If any DTCs other than P1602 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. Disconnect the A53 ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A53-1 (BATT) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR