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 INTELLIGENT TESTER (TILT AND TELESCOPIC MANUAL SWITCH)

CONFIRM DTC

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

CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)

INSPECT TILT AND TELESCOPIC MANUAL SWITCH

DTC B2603 Tilt and Telescopic Manual Switch Circuit Malfunction


DESCRIPTION

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

DTC Code
Detection Condition
Trouble Area
B2603
When operating the tilt and telescopic manual switch, an abnormal voltage value is input to the multiplex tilt and telescopic ECU.
  1. Tilt and telescopic manual switch
  2. Tilt and telescopic manual switch circuit
  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


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 INTELLIGENT TESTER (TILT AND TELESCOPIC MANUAL 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. Use the Data List to check if the tilt and telescopic manual switch is functioning properly.

    Tilt & Telescopic
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Tilt Up Switch
    		Input state of tilt up by manual switch/ON or OFF
    		ON: Tilt up activated by manual switch
    OFF: Tilt up not activated by manual switch
    		-
    Tilt Down Switch
    		Input state of tilt down by manual switch/ON or OFF
    		ON: Tilt down activated by manual switch
    OFF: Tilt down not activated by manual switch
    		-
    Telesco Short Switch
    		Input state of telescopic short by manual switch/ON or OFF
    		ON: Telescopic short activated by manual switch
    OFF: Telescopic short not activated by manual switch
    		-
    Telesco Long Switch
    		Input state of telescopic long by manual switch/ON or OFF
    		ON: Telescopic long activated by manual switch
    OFF: Telescopic long not activated by manual switch
    		-
OK:
"ON" is displayed on the intelligent tester screen when each switch is turned on.
"OFF" is displayed on the intelligent tester 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 - HEADLIGHT DIMMER 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. Disconnect the E27 multiplex tilt and telescopic ECU connector.

  1. Disconnect the E14 headlight dimmer switch or E15 windshield wiper switch connector.

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

    Standard Resistance:
    for Headlight Dimmer Switch LH Side Type
    Tester Connection
    		Condition
    		Specified Condition
    E27-4 (VC) - E14-8 (VC)
    		Always
    		Below 1 Ω
    E27-3 (MSW) - E14-10 (MSW)
    E14-8 (VC) - Body ground
    		Always
    		10 kΩ or higher
    E14-10 (MSW) - Body ground
    for Headlight Dimmer Switch RH Side Type
    Tester Connection
    		Condition
    		Specified Condition
    E27-4 (VC) - E15-6 (VC)
    		Always
    		Below 1 Ω
    E27-3 (MSW) - E15-7 (MSW)
    E15-6 (VC) - Body ground
    		Always
    		10 kΩ or higher
    E15-7 (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 E27 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
    E27-4 (VC) - E27-3 (MSW)
    		Engine switch on (IG)
    		4.9 to 5.1 V


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


5.INSPECT TILT AND TELESCOPIC MANUAL 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 manual 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
    Result
    Result
    		Proceed to
    OK (for headlight dimmer switch LH side)
    		A
    OK (for headlight dimmer switch RH side)
    		B
    NG
    		C


B
REPLACE WINDSHIELD WIPER SWITCH (Click here)

C
REPLACE TILT AND TELESCOPIC MANUAL SWITCH (Click here)
A

REPLACE HEADLIGHT DIMMER SWITCH (Click here)