Lexus NX manuals

Lexus NX: A/C Inverter Malfunction (B1474)

Lexus NX Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System / A/C Inverter Malfunction (B1474)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

B1474

A/C Inverter Malfunction

A/C inverter malfunction
  • Compressor with motor assembly
  • CAN communication system

Memorized

-

CAUTION / NOTICE / HINT

CAUTION:

  • Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Carry the removed service plug in your pocket to prevent other technicians from accidentally reconnecting it while you are servicing the vehicle.
  • Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

NOTICE:

  • After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here

  • When disconnecting and reconnecting the auxiliary battery terminal

    Click here

    HINT:

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Click here

  • The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs from these systems are output simultaneously.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Using the Techstream, check if the CAN communication system is functioning normally.

Click here

Result

Proceed to

CAN communication system DTCs are not output

A

CAN communication system DTCs are output

B
A

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY

B

GO TO CAN COMMUNICATION SYSTEM

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 Removal

REMOVAL CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. PROCEDURE 1. REMOVE FRONT SEAT ASSEMBLY LH Click here 2. REMOVE FRONT LOWER SEAT CUSHION SHIELD Click here 3. REMOVE FRONT SEAT CUSHION SHIELD LH Click here 4. REMOVE FRONT INNER S

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