Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Control Module Communication Bus "A" Off (U0073,U0100,U0124,U0126,U0129,U0140,U0155,U0164)

Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Intelligent Clearance Sonar System / Control Module Communication Bus "A" Off (U0073,U0100,U0124,U0126,U0129,U0140,U0155,U0164)

DESCRIPTION

These DTCs are stored if there is a malfunction in the CAN communication system connected to the clearance warning ECU assembly.

HINT:

If CAN communication system DTCs are stored, they may also be stored in other systems.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0073

Control Module Communication Bus "A" Off

Control module communication bus off

CAN communication system

U0100

Lost Communication with ECM / PCM "A"

Lost communication with ECM

CAN communication system

U0124

Lost Communication with Lateral Acceleration Sensor Module

Lost communication with airbag ECU assembly

CAN communication system

U0126

Lost Communication with Steering Angle Sensor Module

Lost communication with steering sensor

CAN communication system

U0129

Lost Communication with Brake System Control Module

Lost communication with skid control ECU

CAN communication system

U0140

Lost Communication with Body Control Module

Lost communication with main body ECU (multiplex network body ECU)

CAN communication system

U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

Lost communication with meter circuit plate

CAN communication system

U0164

Lost Communication with HVAC Control Module

Lost communication with air conditioning amplifier assembly

CAN communication system

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

Click here

HINT:

After turning the engine switch from off to on (IG), wait 10 seconds or more before checking for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

(b) Clear the DTCs according to the screen on the Techstream.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(c) Recheck for DTCs.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

OK:

No DTCs are output.

HINT:

  • If CAN communication system DTCs are stored, they may also be stored in other systems.
  • If the CAN communication system has been inspected and repaired in other systems, the DTCs will not be output when rechecking for DTCs.
  • If these DTCs are output frequently, duplicate the conditions that caused the problem symptoms and perform the inspection again, even though DTCs were not output when rechecking for DTCs.
OK

GO TO CAN COMMUNICATION SYSTEM

NG

USE SIMULATION METHOD TO CHECK

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