Dtc B2786 No Response From Steering Lock Ecu

Securities. Lexus Gs430, Gs300. Uzs190 Grs190
Engine Immobiliser. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK WIRE HARNESS (CERTIFICATION ECU - STEERING CONTROL ECU)

CHECK OPERATION OF CERTIFICATION ECU

DTC B2786 No Response from Steering Lock ECU


DESCRIPTION

This DTC is output when the certification ECU does not receive LIN communication from the steering lock ECU for 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B2786
Certification ECU does not receive LIN communication from steering lock ECU for 10 seconds
  1. Wire harness
  2. Certification ECU
  3. Steering lock ECU

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Engine Immobiliser.Engine Immobiliser System. Dtc B2786 No Response From Steering Lock Ecu


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Delete the DTC (Click here).

  1. Recheck for DTC.

    Result:
    Result
    		Proceed to
    B2786 output reoccurs
    		A
    B2786 output does not reoccur
    		B


B
NORMAL
A


2.CHECK WIRE HARNESS (CERTIFICATION ECU - STEERING CONTROL ECU)

Lexus Gs430, Gs300. Uzs190 Grs190.Engine Immobiliser.Engine Immobiliser System. Dtc B2786 No Response From Steering Lock Ecu

  1. Disconnect the V28 and L28 ECU connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V28-10 (LIN) - L28-5 (LIN)
    		Below 1 Ω
    V28-10 (LIN) or L28-5 (LIN) - Body ground
    		10 kΩor higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK OPERATION OF CERTIFICATION ECU

  1. After replacing the certification ECU with a normal one, check for DTC.

    Result:
    Result
    		Proceed to
    B2786 output reoccurs
    		A
    B2786 output does not reoccur
    		B


B
REPLACE CERTIFICATION ECU
A

REPLACE STEERING LOCK ECU