HYBRID BATTERY SYSTEM, Diagnostic DTC:P0AFC-123

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

DESCRIPTION


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

  • Battery smart unit

  • Harness or connector

WIRING DIAGRAM

A000SNQE02

CAUTION / NOTICE / HINT

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 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

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

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.

Tech Tips

After repairing, restart the system (turn the power switch on (READY)) and recheck for DTCs 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. Remove the front luggage compartment trim cover Click here.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. A000SXLE02
      Text in Illustration
      *a

      Component with harness connected

      (No. 2 Hybrid Battery Pack Wire Connector)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Tm1-13 (IGCT) - Tm1-12 (GND) Power switch on (IG) 11 to 14 V

      Note

      Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Install the front luggage compartment trim cover.


    NG

    CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - BODY GROUND) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - BATTERY SMART UNIT)

    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. Remove the No. 4 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. Disconnect connector from the battery smart unit.

    4. Disconnect connector from the No. 2 hybrid battery pack wire connector.

    5. A000OW1E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)
      *b

      Rear view of wire harness connector

      (to No. 2 Hybrid Battery Pack Wire Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      m4-1 (IGCT) - Tm1-13 (IGCT) Power switch off Below 1 Ω

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    6. Connect the No. 2 hybrid battery pack wire connector.

    7. Connect the battery smart unit connector.

    8. Install the No. 4 hybrid vehicle battery carrier bracket sub-assembly.


    OK

    REPLACE BATTERY SMART UNIT Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - 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. Remove the front luggage compartment trim cover Click here.

    3. Disconnect connector from the No. 2 hybrid battery pack wire connector.

    4. A000SFBE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Hybrid Battery Pack Wire Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      Tm1-12 (GND) - Body ground Power switch off Below 1 Ω

    5. Connect the No. 2 hybrid battery pack wire connector.

    6. Install the front luggage compartment trim cover.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - BATTERY SMART UNIT)

    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. Remove the No. 4 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. Disconnect connector from the battery smart unit.

    4. Disconnect connector from the No. 2 hybrid battery pack wire connector.

    5. A000MWUE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)
      *b

      Rear view of wire harness connector

      (to No. 2 Hybrid Battery Pack Wire Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      m4-5 (GND) - Tm1-12 (GND) Power switch off Below 1 Ω
      m4-1 (IGCT) or Tm1-13 (IGCT) - Body ground and other terminals Power switch off 10 kΩ or higher

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    6. Connect the No. 2 hybrid battery pack wire connector.

    7. Connect the battery smart unit connector.

    8. Install the No. 4 hybrid vehicle battery carrier bracket sub-assembly.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGCT NO.3 FUSE - NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - BATTERY SMART UNIT)