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

A316097E08

CAUTION / NOTICE / HINT

Note:

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

Tip:

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. A354486C02

      *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