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Home >> Lexus >> 2023 >> NX 350 Base >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Suspension System (Rear) - Service Information (1 Of 3) >> Rear Upper Arm >> Removal [11/2021 - 03/2024] >> Caution / Notice / Hint

Caution / Notice / Hint

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during rear upper control arm assembly removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED (FOR HEV MODEL)

Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Rear wheel alignment adjustment Perform "Calibration"
  • DTCs are stored
  • ABS warning light illuminates
  • Brake system warning light (yellow indicator) illuminates
  • Slip indicator light illuminates
  • Electronically controlled brake system does not operate correctly
 Refer to RESET MEMORY / CALIBRATION [11/2021 - ]
Tires
  • Initialization*1*2
  • Tire Position Identification*1*2
 Tire Pressure Warning System Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System)
Refer to WORK PROCEDURE [11/2021 - 03/2023] , or refer to WORK PROCEDURE [03/2023 - 03/2024]
Rear television camera assembly optical axis (Back camera position setting)*3 Parking Assist Monitor System Refer to CALIBRATION [11/2021 - ]
Parking assist ECU initialization*3 Panoramic View Monitor System Refer to CALIBRATION [11/2021 - 03/2024]
Advanced Park Refer to CALIBRATION [11/2021 - 03/2024]
Suspension parts Rear television camera assembly optical axis (Back camera position setting) Parking Assist Monitor System Refer to CALIBRATION [11/2021 - ]
Parking assist ECU initialization Panoramic View Monitor System Refer to CALIBRATION [11/2021 - 03/2024]
Advanced Park Refer to CALIBRATION [11/2021 - 03/2024]
Perform headlight ECU sub-assembly LH initialization Lighting System (w/ Automatic Headlight Beam Level Control System) Refer to INITIALIZATION [11/2021 - 03/2022] , or refer to INITIALIZATION [03/2022 - ]
Rear height control sensor sub-assembly LH Perform headlight ECU sub-assembly LH initialization Lighting System (w/ Automatic Headlight Beam Level Control System) Refer to INITIALIZATION [11/2021 - 03/2022] , or refer to INITIALIZATION [03/2022 - ]
Gas leak from exhaust system is repaired Perform Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.
 Refer to INITIALIZATION [11/2021 - ]

*1: Also necessary after performing a tire rotation.

*2: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.

*3: The vehicle height changes because of tire replacement.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED (FOR GASOLINE MODEL)

Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Rear wheel alignment adjustment
  • Perform reset memory
  • Perform "Calibration"
  • DTCs are stored
  • ABS warning light illuminates
  • Slip indicator light illuminates
  • Electronically controlled brake system does not operate correctly
 Refer to RESET MEMORY / CALIBRATION [11/2021 - ]
Tires
  • Initialization*1*2
  • Tire Position Identification*1*2
 Tire Pressure Warning System Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System)
Refer to WORK PROCEDURE [11/2021 - 03/2023] , or refer to WORK PROCEDURE [03/2023 - 03/2024]
Rear television camera assembly optical axis (Back camera position setting)*3 Parking Assist Monitor System Refer to CALIBRATION [11/2021 - ]
Parking assist ECU initialization*3 Panoramic View Monitor System Refer to CALIBRATION [11/2021 - 03/2024]
ECU Data Initialization (When performing tire replacement after RoB code X2104 is output) Dynamic Torque Control AWD System (for T24A-FTS, A25A-FKS (Type B)) Refer to CALIBRATION [11/2021 - 03/2023] , or refer to CALIBRATION [03/2023 - ]
Suspension parts Rear television camera assembly optical axis (Back camera position setting) Parking Assist Monitor System Refer to CALIBRATION [11/2021 - ]
Parking assist ECU initialization Panoramic View Monitor System Refer to CALIBRATION [11/2021 - 03/2024]
Perform headlight ECU sub-assembly LH initialization Lighting System (w/ Automatic Headlight Beam Level Control System) Refer to INITIALIZATION [11/2021 - 03/2022] , or refer to INITIALIZATION [03/2022 - ]
Rear height control sensor sub-assembly LH Perform headlight ECU sub-assembly LH initialization Lighting System (w/ Automatic Headlight Beam Level Control System) Refer to INITIALIZATION [11/2021 - 03/2022] , or refer to INITIALIZATION [03/2022 - ]
Gas leak from exhaust system is repaired Perform Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.
 for A25A-FKS: Refer to INITIALIZATION [11/2021 - ]
for T24A-FTS: Refer to INITIALIZATION [11/2021 - ]

*1: Also necessary after performing a tire rotation.

*2: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.

*3: The vehicle height changes because of tire replacement.



WARNING:
  • Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair information. (for HEV Model AWD)
    GTY588409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Refer to PRECAUTION [11/2021 - ]

  • To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system. (for HEV Model AWD)
    GTY588386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.
    GTY563662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


NOTE:

for HEV Model AWD 

  • To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) auxiliary battery terminal.

    Refer to INSPECTION MODE PROCEDURE [11/2021 - ]

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

    Refer to BEFORE DISCONNECTING BATTERY [11/2021 - ]

HINT: 

for HEV Model AWD 

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

ITEMS FOR WHICH LEARNING IS COMPLETED BY DRIVING THE VEHICLE

Effect/Inoperative Function When Necessary Procedures are not Performed Necessary Procedures Link
Lighting System (EXT) Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more. Refer to INITIALIZATION [11/2021 - ]
Front Camera System
Adaptive High Beam System
ITEMS FOR WHICH LEARNING IS COMPLETED BY OPERATING THE VEHICLE NORMALLY

Effect/Inoperative Function When Necessary Procedures are not Performed Necessary Procedures Link
E-latch System
  • Back door opener
 Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch. Refer to INITIALIZATION [11/2021 - ]
Power Back Door System Reset back door close position Refer to INITIALIZATION [11/2021 - ]
Air Conditioning System After the ignition switch is turned to ON, the servo motor standard position is recognized. -


COMPONENTS (REMOVAL) 

Fig 1: Rear Upper Arm Removal Components [11/2021 - 03/2024]
GTY1062631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Callout - Procedure Part Name Code
1 REAR SUSPENSION MEMBER SUB-ASSEMBLY 51206A - - -
2 REAR UPPER CONTROL ARM ASSEMBLY LH 48790 See step  2 - -
3 REAR UPPER CONTROL ARM ASSEMBLY RH 48770A - - -
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