Dtc U1110 Lost Communication With Clearance Sonar Module


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK FOR OPEN IN CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BATTERY AND BODY GROUND)

DTC U1110 Lost Communication with Clearance Sonar Module


DESCRIPTION


DTC Code
DTC Detection Condition
Trouble Area
U1110
There is no communication from the clearance warning ECU assembly.
  1. Power source or inside clearance warning ECU assembly
  2. Clearance warning ECU assembly CAN branch wire or connector
  3. Clearance warning ECU assembly
  1. For vehicles with a TOYOTA parking assist-sensor system (for 4 sensor type).

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc U1110 Lost Communication With Clearance Sonar Module


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.
    NOTICE:
    1. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (LandCruiser RM000003YMD00TX.html).
    2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).

NEXT


2.CHECK FOR OPEN IN CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY CAN BRANCH WIRE)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc U1110 Lost Communication With Clearance Sonar Module

  1. Disconnect the I1 clearance warning ECU assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    I1-3 (R1) - I1-5 (R2)
    		Ignition switch off
    		54 to 69 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Clearance Warning ECU Assembly)


NG
REPAIR OR REPLACE CLEARANCE WARNING ECU ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (R1, R2)
OK


3.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc U1110 Lost Communication With Clearance Sonar Module

  1. Connect the cable to the negative (-) battery terminal.

    NOTICE:
    When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    I1-17 (E) - Body ground
    		Always
    		Below 1 Ω

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    I1-15 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Clearance Warning ECU Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE CLEARANCE WARNING ECU ASSEMBLY (LandCruiser RM00000470500NX.html)