Dtc B2602 Key Unlock Warning Switch Circuit Malfunction

Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200
Steering Column. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT

READ VALUE USING INTELLIGENT TESTER (COMMUNICATION STATE OF ENGINE SWITCH AND KEY CODE)

RECONFIRM DTC

DTC B2602 Key Unlock Warning Switch Circuit Malfunction

DTC B2606 Key Code Confirm Signal Malfunction


DESCRIPTION

A key code confirmation signal (ON or OFF) is sent from the main body ECU to the multiplex tilt and telescopic ECU via the communication bus.
The multiplex tilt and telescopic ECU uses this signal to operate the auto away/return function.

DTC Code
Detection Condition
Trouble Area
B2602
Both of the following conditions continue:
  1. The key code confirmation signal is off.
  1. The engine switch is on (IG).
  1. CAN communication system
  2. Entry and start system (for start function)
  3. Multiplex tilt and telescopic ECU
B2606
IG signals and/or key code confirmation signals are not received correctly.
  1. CAN communication system
  2. Entry and start system (for start function)
  3. Multiplex tilt and telescopic ECU

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Steering Column.Power Tilt And Power Telescopic Steering Column System. Dtc B2602 Key Unlock Warning Switch Circuit Malfunction


INSPECTION PROCEDURE

1.CHECK OTHER DTC OUTPUT
HINT:
The power tilt and power telescopic steering column system uses the CAN communication system, so check its diagnostic system before proceeding to troubleshooting.

  1. Check if DTC B2621 is output.

    Result
    DTC Condition
    		Proceed to
    B2621 is not output
    		A
    B2621 is output
    		B
    HINT:
    1. If DTC B2621 is output, perform troubleshooting for B2621 first.
    2. DTC B2621 indicates a communication interruption for the power tilt and power telescopic steering column system.


B
REPAIR CIRCUIT INDICATED BY OUTPUT CODE (Click here)
A


2.READ VALUE USING INTELLIGENT TESTER (COMMUNICATION STATE OF ENGINE SWITCH AND KEY CODE)

  1. Use the Data List to check if the communication of the key code and the engine switch are functioning properly.

    Tilt & Telescopic
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    IG Switch (CAN)
    		Communication state of engine switch/ON or OFF
    		ON: Communication normal
    OFF: Communication interrupted
    		-
    Key Code Confirm (CAN)
    		Communication state of key code confirmation signal/ON or OFF
    		ON: Communication normal
    OFF: Communication interrupted
    		-
OK:
"ON" is displayed.


NG
GO TO ENTRY AND START SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
OK


3.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2602 and/or B2606 is not output.


NG
REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)