Dtc B2786 No Response From Steering Lock Ecu

Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Steering Column. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC (CERTIFICATION ECU)

CHECK WIRE HARNESS (CERTIFICATION ECU - STEERING LOCK 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.
The diagnosis information of the steering lock ECU is transmitted to the tester via the certification ECU as the steering lock ECU is not connected to the CAN communication system.

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 actuator (Steering lock ECU)

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Steering Column.Steering System. Dtc B2786 No Response From Steering Lock Ecu


INSPECTION PROCEDURE

HINT:
When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:
Before starting the inspection, with the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.
1.CHECK DTC (CERTIFICATION ECU)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and press the intelligent tester main switch ON.

  1. Clear the DTCs of the certification ECU by following the prompts displayed on the intelligent tester.

  1. Recheck for DTC.

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


B
NORMAL (CHECK FOR INTERMITTENT PROBLEM)
A


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

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Steering Column.Steering System. Dtc B2786 No Response From Steering Lock Ecu

  1. Disconnect the E63 certification ECU connector.

  1. Disconnect the E6 steering lock actuator connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    E63-10 (LIN) - E6-5 (LIN)
    		Below 1 Ω
    E6-5 (LIN) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK OPERATION OF CERTIFICATION ECU

  1. Replace the certification ECU with a normally functioning or new one.

  1. 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 ACTUATOR ASSEMBLY