DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery / Charging System (W/ Stop And Start System) (2GR-FKS) - Diagnostic Codes & Symptom Tests >> CHARGING SYSTEM (w/ Stop And Start System) >> DTC P1602-00: Deterioration of Battery Low Capacity [12/2019 - 10/2022] >> Procedure

DTC P1602-00: Deterioration of Battery Low Capacity [12/2019 - 10/2022]: Procedure

  1. CHECK CHARGING SYSTEM 

    Refer to ON-VEHICLE INSPECTION [12/2019 - 10/2022] 

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE CHARGING SYSTEM 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the A28 ECM connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY874857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)

      Standard Voltage

      Tester Connection Condition Specified Condition
      A28-1 (BATT) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ECM) 

Diesel-Data.com