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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Hybrid Control System - Diagnostic Codes (2 Of 5)) >> Hybrid Control System >> DTC P0ABF-00: Hybrid/EV Battery Current Sensor "A" Circuit Range/Performance [11/2021 - ] >> Procedure

DTC P0ABF-00: Hybrid/EV Battery Current Sensor "A" Circuit Range/Performance [11/2021 - ]: Procedure

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  1. CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 1 HV SUPPLY STACK SUB-ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the No. 1 HV supply stack sub-assembly connector.
      GTY995718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    3. Disconnect the battery ECU assembly connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

      GTY1066391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the resistance according to the value(s) in the tables below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      z14-24 (IB1) - A-2 (IB1) Ignition switch off Below 1 Ω
      z14-23 (GIB) - A-10 (GIB) Ignition switch off Below 1 Ω
      z14-12 (IB0) - A-11 (IB0) Ignition switch off Below 1 Ω
      z14-36 (VIB) - A-1 (VIB) Ignition switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      z14-24 (IB1) or A-2 (IB1) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      z14-23 (GIB) or A-10 (GIB) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      z14-12 (IB0) or A-11 (IB0) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      z14-36 (VIB) or A-1 (VIB) - Other terminals and body ground Ignition switch off 10 kΩ or higher
    5. Reconnect the battery ECU assembly connector.
    6. Reconnect the No. 1 HV supply stack sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (NO. 2 HV SUPPLY STACK SUB-ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the No. 2 HV supply stack sub-assembly connector.
      GTY995395Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    3. Disconnect the battery current sensor connector from the HV battery junction block assembly.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

      GTY1066351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the resistance according to the value(s) in the tables below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A-2 (IB1) - z11-2 (IB1) Ignition switch off Below 1 Ω
      A-10 (GIB) - z11-3 (GIB) Ignition switch off Below 1 Ω
      A-11 (IB0) - z11-4 (IB0) Ignition switch off Below 1 Ω
      A-1 (VIB) - z11-1 (VIB) Ignition switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A-2 (IB1) or z11-2 (IB1) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      A-10 (GIB) or z11-3 (GIB) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      A-11 (IB0) or z11-4 (IB0) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      A-1 (VIB) or z11-1 (VIB) - Other terminals and body ground Ignition switch off 10 kΩ or higher
    5. Reconnect the battery current sensor connector to the HV battery junction block assembly.
    6. Reconnect the No. 2 HV supply stack sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the battery ECU assembly connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

      GTY1066391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the battery current sensor connector from the HV battery junction block assembly.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

      GTY1066351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the resistance according to the value(s) in the tables below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      z14-24 (IB1) - z11-2 (IB1) Ignition switch off Below 1 Ω
      z14-23 (GIB) - z11-3 (GIB) Ignition switch off Below 1 Ω
      z14-12 (IB0) - z11-4 (IB0) Ignition switch off Below 1 Ω
      z14-36 (VIB) - z11-1 (VIB) Ignition switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      z14-24 (IB1) or z11-2 (IB1) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      z14-23 (GIB) or z11-3 (GIB) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      z14-12 (IB0) or z11-4 (IB0) - Other terminals and body ground Ignition switch off 10 kΩ or higher
      z14-36 (VIB) or z11-1 (VIB) - Other terminals and body ground Ignition switch off 10 kΩ or higher
    5. Reconnect the battery current sensor connector to the HV battery junction block assembly.
    6. Reconnect the battery ECU assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  4

  4. REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [11/2021 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. CLEAR DTC 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  6

  6. PERFORM ROAD TEST 
    1. Check that "Hybrid/EV Battery SOC" shows 60% or less.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Hybrid/EV Battery SOC

      HINT: 

      If "Hybrid/EV Battery SOC" is 60% or more, reduce it to below 60% by leaving the hybrid system on with shift lever in N.

    2. Apply the parking brake and secure the wheels using chocks.
    3. Turn the ignition switch to ON (READY).
    4. Move the shift lever to D while depressing the brake pedal with your left foot and repeat the following steps for 1 minute or more.

      HINT: 

      Depress and release the accelerator pedal in 5-second intervals (2.5 seconds each) continuously.

      1. While depressing the brake pedal with your left foot, depress the accelerator pedal with your right foot.
      2. Release the accelerator pedal.
    5. Turn the ignition switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  7

  7. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P0ABF-00 is not output. A
      P0ABF-00 is output again. B
    2. Turn the ignition switch off.

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE BATTERY ECU ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

  8. CHECK HARNESS AND CONNECTOR (NO. 1 HV SUPPLY STACK SUB-ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the o. 1 HV supply stack sub-assembly connector.
      GTY995718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    3. Check the terminals of the male side of the A No. 1 HV supply stack sub-assembly connector.

      OK

      The terminals are free of foreign matter and not damaged.

    4. Reconnect the No. 1 HV supply stack sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    NG 

    REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

  9. CHECK HARNESS AND CONNECTOR (NO. 1 HV SUPPLY STACK SUB-ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the No. 1 HV supply stack sub-assembly connector.
      GTY995718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    3. Check the terminals of the male side of the A No. 1 HV supply stack sub-assembly connector.

      OK

      The terminals are free of foreign matter and not damaged.

    4. Reconnect the No. 1 HV supply stack sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY AND NO. 2 HV SUPPLY STACK SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    NG 

    REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

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