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. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P1602 Deterioration of Battery

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

(1 trip detection logic)

  • Battery

  • Wire harness or connector

 Charge warning light does not come on DTC stored w/ Battery Current Sensor

WIRING DIAGRAM

A01LZQBE08
*a from Battery

CAUTION / NOTICE / HINT

Note

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

Tech Tips

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

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A01M0SSC02
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the A50 ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A50-1 (BATT) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR