Lexus NX manuals

Lexus NX: Hybrid Battery Pack Sensor Module (P0AFC-150)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (hybrid / Battery Control) / Hybrid Control System / Hybrid Battery Pack Sensor Module (P0AFC-150)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0AFC-150

Hybrid Battery Pack Sensor Module

Abnormal battery voltage sensor power source voltage:

Power source voltage of the battery voltage sensor drops during precharge.

(1 trip detection logic)
  • Battery voltage sensor
  • Wire harness or connector

Comes on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0AFC-150
  • Auxiliary Battery Vol (Battery voltage sensor power source voltage)
  • +B

MONITOR DESCRIPTION

When the hybrid vehicle control ECU detects a low power supply voltage for the battery voltage sensor while pre-charge is occurring, it determines that there is a malfunction in the battery voltage sensor circuit. If the hybrid vehicle control ECU detects a malfunction, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0AFC (INF 150): Power supply circuit malfunction

Required sensors/components

Battery voltage sensor

Frequency of operation

-

Duration

TMC's intellectual property

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Hybrid vehicle control ECU

DTC P0AFC (INF 150) 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 and wait for 30 seconds or more.
  5. Turn the power switch on (READY).
  6. Wait for 15 seconds or more.
  7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
  8. Read the current DTCs.

    HINT:

    • If a current DTC is output, the system is malfunctioning.
    • If current DTCs are not output, perform the following steps to check for permanent DTCs.
  9. Check that the permanent DTCs are cleared.
  10. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AFC-123.

Click here

CAUTION / NOTICE / HINT

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 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

    HINT:

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

NOTICE:

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

HINT:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Turn the power switch on (READY) and wait for 15 seconds or more.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

Click here

OK

REPLACE BATTERY VOLTAGE SENSOR

NG

2.

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BODY GROUND)

Click here

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (IGCT NO. 4 FUSE - BATTERY VOLTAGE SENSOR)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR - BODY GROUND)

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