Can Communication System (For Lhd Without Central Gateway Ecu) Power Steering Ecu Communication Stop Mode

Power Source Network. Land Cruiser. Urj200, 202 Grj200 Vdj200
Networking. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR OPEN IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BATTERY AND BODY GROUND)

CAN COMMUNICATION SYSTEM (for LHD without Central Gateway ECU) - Power Steering ECU Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
Power Steering ECU Communication Stop Mode
Either Condition is met:
  1. "PPS" is not displayed on the "Bus Check" screen (Click here).
  2. Communication system DTCs (DTCs that start with U) that are output correspond to "Power Steering ECU Communication Stop Mode" in "DTC Combination Table" (Click here).
  1. Power steering ECU assembly CAN branch wire or connector
  2. Power source circuit of power steering ECU assembly
  3. Power steering ECU assembly ground circuit
  4. Power steering ECU assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd Without Central Gateway Ecu) Power Steering Ecu Communication Stop Mode


INSPECTION PROCEDURE

NOTICE:
  1. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  2. 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 (Click here).
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
  1. Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
1.CHECK FOR OPEN IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY CAN BRANCH WIRE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd Without Central Gateway Ecu) Power Steering Ecu Communication Stop Mode

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Disconnect the power steering ECU assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E102-1 (CANH) - E102-2 (CANL)
    		Cable disconnected from negative (-) battery terminal
    		54 to 69 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Power Steering ECU Assembly)


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CANH, CANL)
OK


2.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BATTERY AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd Without Central Gateway Ecu) Power Steering Ecu Communication Stop Mode

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

    NOTICE:
    When connecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E102-5 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E102-3 (GND) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Power Steering ECU Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER STEERING ECU ASSEMBLY (Click here)