HYBRID BATTERY SYSTEM, Diagnostic DTC:P0AFC-123

DTC Code DTC Name
P0AFC-123 Hybrid Battery Pack Sensor Module

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
P0AFC-123 The power management control ECU receives an error signal from the battery smart unit.

  • Battery smart unit

  • Wire harness or connector

  • IGCT No. 2 fuse

WIRING DIAGRAM

A003X9JE01

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Click here.

Tech Tips


  • Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

  • After completing repairs, restart the system (turn the power switch on (READY)) and recheck for DTCs Click here.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Turn the power switch on (IG).

    3. A003WPYE18
      Text in Illustration
      *a

      Component with harness connected

      (Battery Smart Unit)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      i1-4 (IGCT) - i1-8 (GND) Power switch on (IG) 11 to 14 V

      Note


      • After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

      • Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set. Use the intelligent tester to clear the DTCs Click here.

    4. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (GND - BODY GROUND) Click here

    OK

    REPLACE BATTERY SMART UNIT Click here

  2. CHECK HARNESS AND CONNECTOR (GND - BODY GROUND)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A003WPYE15
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      i1-8 (GND) - Body ground Power switch off Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HARNESS OR CONNECTOR (IGCT NO. 2 FUSE - BATTERY SMART UNIT)