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

(1 trip detection logic)

  • Charging system

  • ECM back-up power source circuit

WIRING DIAGRAM

A005LBSE03

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. CHECK HARNESS AND CONNECTOR (BATTERY - ECM)


    1. A005HRUE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the A58 ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A58-1 (BATT) - Body ground Always 11 to 14 V

    OK

    CHECK FOR INTERMITTENT PROBLEMS (FOR SFI SYSTEM) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR