HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AFC-150

DTC Code DTC Name
P0AFC-150 Hybrid Battery Pack Sensor Module

DESCRIPTION

The hybrid vehicle control ECU alerts the driver and performs fail-safe control based on error signals sent from the battery smart unit.

DTC NO. INF Code DTC Detection Condition Trouble Area
P0AFC 150 Power source voltage of the battery smart unit drops during precharge.

  • Battery smart unit

  • Wire harness or connector

  • Auxiliary battery

  • Fuse

WIRING DIAGRAM

A01GWFJE06

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. 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. 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.

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

PROCEDURE


  1. CHECK AUXILIARY BATTERY


    1. Turn the power switch off.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      Auxiliary battery positive terminal (+) - Auxiliary battery negative terminal (-) 20°C (68° F) 11 to 14 V

    NG

    CHARGE OR REPLACE AUXILIARY BATTERY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)


    1. Turn the power switch on (IG).

    2. A01H1YGE02
      A01GXF3E03

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      zR3-3 (IGCT) - zR3-16 (GND) Power switch on (IG) 11 to 14 V

      Tech Tips


      • For the removal and installation procedures related to the No. 1 battery pack wire connector inspection, Click here.

      • Perform this inspection with the No. 1 battery pack wire connected.


    NG

    CHECK FUSE (IGCT3 FUSE) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR - BATTERY SMART UNIT)


    1. A01H01PE02

      Turn the power switch off.

    2. Disconnect the No. 1 battery pack wire connector.

    3. Disconnect connector z36 from the battery smart unit.

      Tech Tips

      For the removal and installation procedures related to the battery smart unit, Click here.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      zR3-3 (IGCT) - z36-1 (IGCT) Power switch off Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BATTERY SMART UNIT Click here

  4. CHECK FUSE (IGCT3 FUSE)


    1. A01GZIOE01

      Remove the IGCT3 fuse from the luggage room junction block assembly.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      IGCT3 fuse terminals Always Below 1 Ω

    NG

    REPLACE FUSE (IGCT3 FUSE)

    OK

  5. CHECK FUSE (IGCT2 NO. 2 FUSE)


    1. A01GW45E01

      Remove the IGCT2 NO. 2 fuse from the engine room No. 3 relay block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      IGCT2 NO. 2 Fuse Terminals Always Below 1 Ω

    NG

    REPLACE FUSE (IGCT2 NO. 2 FUSE)

    OK

  6. INSPECT RELAY (ST CUT/IGCT2)


    1. A01H1JXE04

      Remove the ST CUT/IGCT2 relay from the engine room No. 2 relay block.

    2. A01GZ8X

      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. Below 1 Ω
      Auxiliary battery voltage is not applied between terminals 1 and 2. 10 kΩ or higher

    NG

    REPLACE RELAY (ST CUT/IGCT2)

    OK

  7. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR A - ST CUT/IGCT2 RELAY)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01H1YGE02

      Disconnect the No. 1 battery pack wire connector.

    2. A01GZIOE01

      Install the IGCT3 fuse to the luggage room junction block assembly.

    3. A01GW45E01

      Install the IGCT2 NO. 2 fuse to the engine room No. 3 relay block.

    4. Remove the ST CUT/IGCT2 relay from the engine room No. 2 relay block.

    5. A01H0Q8E04

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      zR3-3 (IGCT) - Engine room No. 2 relay block ST CUT/IGCT2 relay terminal 3 Power switch off Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK AND REPAIR POWER SOURCE CIRCUIT (ST CUT/IGCT2 RELAY)