Dtc B2603 Tilt And Telescopic Manual Switch Circuit Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (TILT UP/DOWN SWITCH, TELESCOPIC SHORT/LONG SWITCH)

CONFIRM DTC

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT AND TELESCOPIC SWITCH)

CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)

CHECK TILT AND TELESCOPIC SWITCH

DTC B2603 Tilt and Telescopic Manual Switch Circuit Malfunction


DESCRIPTION

Different voltage values are sent to the multiplex tilt and telescopic ECU by operating the tilt and telescopic switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should operate based on the voltage value.

DTC No.
Detection Condition
Trouble Area
B2603
When operating the tilt and telescopic switch, an abnormal voltage value is sent to the multiplex tilt and telescopic ECU.
  1. Tilt and telescopic switch
  2. Harness or connector
  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 B2603 Tilt And Telescopic Manual Switch Circuit Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING GTS (TILT UP/DOWN SWITCH, TELESCOPIC SHORT/LONG SWITCH)

  1. Turn the engine switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Check the tilt and telescopic manual switch. Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.

    Tilt & Telescopic
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Tilt Up Switch
    		Input state of tilt up switch/
    ON or OFF
    		ON: Tilt up switch activated
    OFF: Tilt up switch not activated
    		-
    Tilt Down Switch
    		Input state of tilt down switch/
    ON or OFF
    		ON: Tilt down switch activated
    OFF: Tilt down switch not activated
    		-
    Telesco Short Switch
    		Input state of telescopic contract switch/
    ON or OFF
    		ON: Telescopic contract switch activated
    OFF: Telescopic contract switch not activated
    		-
    Telesco Long Switch
    		Input state of telescopic extend switch/
    ON or OFF
    		ON: Telescopic extend switch activated
    OFF: Telescopic extend switch not activated
    		-
    OK:
    "ON" is displayed on the GTS screen when each switch is turned on.
    "OFF" is displayed on the GTS screen when each switch is turned off.


NG
Go to step 3
OK


2.CONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC is output.
    		A
    DTC is not output.
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (Click here)

3.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT AND TELESCOPIC SWITCH)

  1. Disconnect the E144 multiplex tilt and telescopic ECU connector.

  1. Disconnect the E141 tilt and telescopic switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E144-5 (VC) - E141-1 (VC)
    		Always
    		Below 1 Ω
    E144-18 (MSW) - E141-3 (MSW)
    E144-5 (VC) - Body ground
    		10 kΩ or higher
    E144-18 (MSW) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Steering Column.Power Tilt And Power Telescopic Steering Column System. Dtc B2603 Tilt And Telescopic Manual Switch Circuit Malfunction

  1. Reconnect the multiplex tilt and telescopic ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E144-5 (VC) - E144-18 (MSW)
    		Engine switch on (IG)
    		4.9 to 5.1 V
    Text in Illustration
    *a
    		Component with harness connected
    (Multiplex Tilt and Telescopic ECU)


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


5.CHECK TILT AND TELESCOPIC SWITCH


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Steering Column.Power Tilt And Power Telescopic Steering Column System. Dtc B2603 Tilt And Telescopic Manual Switch Circuit Malfunction

  1. Remove the tilt and telescopic switch (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 (VC) - 3 (MSW)
    		Tilt up
    		342 to 378 Ω
    Tilt down
    		1890.5 to 2089.5 Ω
    Telescopic contract
    		750.5 to 829.5 Ω
    Telescopic extend
    		152 to 168 Ω
    Text in Illustration
    *a
    		Component without harness connected
    (Tilt and Telescopic Switch)


NG
REPLACE TILT AND TELESCOPIC SWITCH (Click here)
OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (Click here)