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

  • Wire harness or connector

MONITOR DESCRIPTION

If the battery smart unit detects an internal malfunction in the unit itself, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs P0AFC (INF 123): Power supply circuit malfunction
Required sensors / components Battery smart unit
Frequency of operation Continuous
Duration TMC's intellectual property
MIL operation TMC's intellectual property
Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present TMC's intellectual property
Other conditions belong to TMC's intellectual property -

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property -

COMPONENT OPERATING RANGE

Battery smart unit DTC P0AFC (INF 123) is not detected

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.

  2. Turn the power switch on (IG) and turn the Techstream on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off.

  5. Turn the power switch on (READY) and turn the Techstream on.

  6. Perform the universal trip.

  7. Enter the following menus: Powertrain / HV / Trouble Codes.

  8. Check that permanent DTCs are cleared.

    Tech Tips

    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

A011XI3E01

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

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

      A011YC9E01
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N18-3 (IGCT) - N18-6 (GND) Power switch on (IG) 11 to 14 V
      Text in Illustration
      *a

      Component with harness connected

      (Battery Smart Unit)

      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 (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. Remove the front luggage compartment trim cover Click here.

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

      A011YC9E02
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      N18-6 (GND) - Body ground Power switch off Below 1 Ω
      Text in Illustration
      *a

      Component with harness connected

      (Battery Smart Unit)

    4. Install the front luggage compartment trim cover.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND - BODY GROUND)

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATT VL SSR FUSE - BATTERY SMART UNIT)