Lexus NX manuals

Lexus NX: Lost Communication With TCM (U0101,U0122,U0142,U0155,U0327,U1114,U1117)

Lexus NX Service Manual / Vehicle Exterior / Door / Hatch / Power Back Door System / Lost Communication With TCM (U0101,U0122,U0142,U0155,U0327,U1114,U1117)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the CAN communication circuit.

DTC No.

Detection Item

Trouble Area

U0101

Lost Communication With TCM
  • CAN communication system
  • ECM
  • Multiplex network door ECU

U0122

Lost Communication With Vehicle Dynamics Control Module
  • CAN communication system
  • Brake actuator assembly (skid control ECU)
  • Multiplex network door ECU

U0142

Lost Communication with Body Control Module "B"
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Multiplex network door ECU

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module
  • CAN communication system
  • Combination meter assembly
  • Multiplex network door ECU

U0327

Lost Communication with Vehicle Security Control Module
  • CAN communication system
  • Certification ECU (smart key ECU assembly)
  • Multiplex network door ECU

U1114

Lost Communication with Main Switch Module
  • CAN communication system
  • Combination meter assembly
  • Multiplex network door ECU

U1117

Lost Communication with Accessory Gateway
  • CAN communication system
  • Bus buffer ECU
  • Multiplex network door ECU

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Back Door > Clear DTCs

(b) Check for DTCs.

Click here

Body Electrical > Back Door > Trouble Codes

OK:

DTC (CAN communication system DTC) is not output

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

READ NEXT:

 Power Back Door cannot be Operated Using Any Switch

DESCRIPTION When the power back door cannot be operated using any switch, one of the following may be the cause: 1) initialization of the multiplex network door ECU, 2) power back door sensor assembly

 Power Back Door cannot be Opened or Closed Using the Power Back Door Switch

DESCRIPTION When the power back door cannot be opened or closed using the combination switch assembly, one of the following may be malfunctioning: 1) combination switch assembly circuit, 2) multiplex

 Power Back Door cannot be Opened or Closed Using the Back Door Control Switch

DESCRIPTION When the power back door cannot be closed using the back door control switch, either of the following may be malfunctioning: 1) back door control switch circuit or 2) multiplex network doo

SEE MORE:

 Removal

REMOVAL PROCEDURE 1. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY Click here 2. DISCONNECT TRANSMISSION CONTROL CABLE ASSEMBLY (a) Remove the nut and disconnect the transmission control cable assembly from the control shaft lever. (b) Remove the clip from the transmission control cabl

 Inspection

INSPECTION PROCEDURE 1. INSPECT NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY (a) Turn the roller by hand and check that it turns smoothly. If the roller does not turn smoothly, replace the No. 1 valve rocker arm sub-assembly. 2. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOTICE: Keep the adjuster free from dirt

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