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. 3 fuse

  • IGCT MAIN relay

WIRING DIAGRAM

A01NHO5E02

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 disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

    Tech Tips

    At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal
Specification Waiting Time
w/o Telematics transceiver 60 sec.
w/ Telematics transceiver 120 sec.

Tech Tips

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

PROCEDURE


  1. CHECK FUSE (IGCT NO. 3)


    1. A01NESSE01
      Text in Illustration
      *1 Engine Room Relay Block No. 2
      *2 IGCT No. 3 Fuse

      Remove the IGCT No. 3 fuse from the engine room relay block No. 2.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IGCT No. 3 fuse Always Below 1 Ω

    3. Install the IGCT No. 3 fuse to the engine room relay block No. 2.


    NG

    REPLACE FUSE (IGCT NO. 3)

    OK

  2. CHECK RELAY (IGCT MAIN)


    1. A01NDBGE01
      Text in Illustration
      *1 Engine Room Relay Block No. 2
      *2 IGCT MAIN Relay

      Remove the IGCT MAIN relay from the engine room relay block No. 2.

    2. A01NFEUE17

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is applied between terminals 1 and 2 10 kΩ or more
      Auxiliary battery voltage is not applied between terminals 1 and 2 below 1 Ω

    3. Install the IGCT MAIN relay to the engine room relay block No. 2.


    NG

    REPLACE RELAY (IGCT MAIN)

    OK

  3. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

    3. Remove the battery cover Click here.

    4. Remove the battery smart unit.

      Tech Tips

      Do not disconnect the battery smart unit connector.

    5. Connect the cable to the negative (-) battery terminal.

    6. Turn the power switch on (IG).

    7. A01NFZCE04
      Text in Illustration
      *1

      Component with harness connected

      (Battery Smart Unit)

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

      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.

      Tech Tips

      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.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z30-1 (IGCT) - z30-5 (GND) Power switch on (IG) 11 to 14V

    8. Install the battery smart unit Click here.

    9. Install the battery cover.


    NG

    CHECK HARNESS AND CONNECTOR (IGCT MAIN RELAY - BATTERY SMART UNIT) Click here

    OK

    REPLACE BATTERY SMART UNIT Click here

  4. CHECK HARNESS AND CONNECTOR (IGCT MAIN RELAY - BATTERY SMART UNIT)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. A01NDBGE01
      Text in Illustration
      *1 Engine Room Relay Block No. 2
      *2 IGCT MAIN Relay

      Remove the IGCT MAIN relay from the engine room relay block No. 2.

    3. 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.

    4. Remove the battery cover Click here.

    5. Remove the battery smart unit.

      Tech Tips

      Disconnect only the z30 connector of the battery smart unit.

    6. A01NG53E03
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Battery Smart Unit)
      *2 Engine Room Relay Block No. 2
      *3 IGCT MAIN relay terminal 3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      IGCT MAIN relay terminal 3 - z30-1 (IGCT) Power switch off Below 1 Ω

    7. Install the battery smart unit Click here.

    8. Install the battery cover.

    9. Install the IGCT MAIN relay to the Engine Room Relay Block No. 2.

    10. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK AND REPAIR POWER SOURCE CIRCUIT