Can Communication System Steering Control Ecu Communication Stop Mode

Communication System. Lexus Gs430, Gs300. Uzs190 Grs190
Can Communication. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN BUS LINE FOR DISCONNECTION (STEERING CONTROL ECU SUB BUS LINE)

CHECK WIRE HARNESS (IG, PGND)

CAN COMMUNICATION SYSTEM - Steering Control ECU Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
STEERING CONTROL ECU COMMUNICATION STOP MODE
  1. "VGRS" is not displayed on the "Communication Bus Check" of the intelligent tester
  2. Applies to "STEERING CONTROL ECU COMMUNICATION STOP MODE" in the "DTC COMBINATION TABLE"
  1. Power source or inside the steering control ECU
  2. Steering control ECU sub bus line or connector

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Steering Control Ecu Communication Stop Mode


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Steering Control Ecu Communication Stop Mode


INSPECTION PROCEDURE

1.CHECK CAN BUS LINE FOR DISCONNECTION (STEERING CONTROL ECU SUB BUS LINE)

  1. Turn the engine switch off.

  1. Disconnect the steering control ECU (L70).



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Steering Control Ecu Communication Stop Mode

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    L70-9 (CANH) - L70-20 (CANL)
    		Engine switch off
    		54 to 69 Ω


NG
REPAIR OR REPLACE STEERING CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
OK


2.CHECK WIRE HARNESS (IG, PGND)

  1. Reconnect the steering control ECU connector (L70).

  1. Disconnect the steering control ECU connector (A42).



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Steering Control Ecu Communication Stop Mode

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    A42-7 (PGND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Value
    A42-3 (IG) - Body ground
    		Engine switch on (IG)
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE STEERING CONTROL ECU