CHARGING SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
P1602

Battery power is 0% while the engine is running

(1 trip detection logic)

  • Charging system

  • ECM back-up power source circuit

WIRING DIAGRAM

A01CE0HE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1602)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine / DTC.

    5. Read the DTC.

      Result
      Result Proceed to
      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 (FOR SFI SYSTEM) Click here

    A

  2. INSPECT CHARGING SYSTEM


    1. Inspect the charging system Click here.


    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (BATT POWER SOURCE)


    1. A01CBGLE01

      Disconnect the ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A8-20 (BATT) - Body ground Always 11 to 14 V

    3. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - EFI FUSE)

    OK

    CHECK FOR INTERMITTENT PROBLEMS (FOR SFI SYSTEM) Click here