CHARGING SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

The battery state sensor assembly detects the battery voltage. The battery condition is calculated from the voltage when the engine is running (except when cranking) and then output to the ECM. A DTC is output when battery degradation is determined based on this signal.

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

Diagnosis condition: Engine running (except when cranking)

Malfunction status: Battery capacity is abnormally low for 10 seconds or more.

Other: 1 trip

  • Battery

  • Wire harness or connector

 Not displayed DTC stored

WIRING DIAGRAM

Refer to DTC P058A (Battery Monitor Module Performance).

Click here

CAUTION / NOTICE / HINT

Note


  • When P058A (Battery Monitor Module Performance) is output at the same time, perform the inspection for P058A (Battery Monitor Module Performance) first.

    Click here

  • When P162B (Lost Communication with Battery Monitor Module) is output at the same time, perform the inspection for P162B (Lost Communication with Battery Monitor Module) first.

    Click here

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

PROCEDURE


  1. CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION


    1. Check the installation condition of the battery state sensor assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    INSTALL BATTERY STATE SENSOR ASSEMBLY CORRECTLY Click here

    OK

  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. B0057MCC04
      *a

      Front view of wire harness connector

      (to Battery state sensor assembly)

      Disconnect the C55 battery state sensor assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C55-1 (AM21) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR