Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - NETWORKING

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PRECAUTION

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK FOR OPEN IN CAN BUS WIRE (POWER BACK DOOR ECU CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - BATTERY AND BODY GROUND)

DTC U0230 Lost Communication with Rear Gate Module

DESCRIPTION

DTC CodeDTC Detection ConditionTrouble Area
U0230There is no communication from the power back door unit assembly (power back door ECU).
Power source circuit of power back door (power back door ECU)
Power back door unit (power back door ECU) CAN branch wire or connector
Power back door unit (power back door ECU)
For vehicles with a power back door system.

WIRING DIAGRAM

Dtc U0230 Lost Communication With Rear Gate Module. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

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

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

  • CAUTION:
  • For vehicles with an SRS system:
  • Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
  • NOTICE:
  • When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().
NEXT
3.CHECK FOR OPEN IN CAN BUS WIRE (POWER BACK DOOR ECU CAN BRANCH WIRE)
Dtc U0230 Lost Communication With Rear Gate Module. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the L52 power back door unit assembly (power back door ECU) connector.

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

  • Standard Resistance:
  • Tester ConnectionSwitch ConditionSpecified Condition
    L52-6 (MPX1) - L52-5 (MPX2)Ignition switch off54 to 69 Ω
Text in Illustration
*aRear view of wire harness connector
(to Power Back Door Unit Assembly [Power Back Door ECU])
NG
REPAIR OR REPLACE POWER BACK DOOR ECU CAN BRANCH WIRE OR CONNECTOR (MPX1, MPX2)
OK
4.CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - BATTERY AND BODY GROUND)
Dtc U0230 Lost Communication With Rear Gate Module. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

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

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

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    L52-11 (GND) - Body groundAlwaysBelow 1 Ω

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

  • Standard Voltage:
  • Tester ConnectionConditionSpecified Condition
    L52-10 (ECUB) - Body groundAlways11 to 14 V
Text in Illustration
*aRear view of wire harness connector
(to Power Back Door Unit Assembly [Power Back Door ECU])
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU) ()
NETWORKING
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
CAN COMMUNICATION SYSTEM for LHD