POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM, Diagnostic DTC:B2603

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.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

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

   
   
   1. 

      Text in Illustration

      *a	Tilt Up
      *b	Tilt Down
      *c	Telescopic Extend (Long)
      *d	Telescopic Contract (Short)

      Turn the engine switch off.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the engine switch on (IG).

   4. Turn the intelligent tester on.

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

      Tilt & Telescopic

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Telesco Short Switch	Input state of telescopic contract switch/ OFF or ON	OFF: Telescopic contract switch not activated ON: Telescopic contract switch activated	-
      Telesco Long Switch	Input state of telescopic extend switch/ OFF or ON	OFF: Telescopic extend switch not activated ON: Telescopic extend switch activated	-
      Tilt Down Switch	Input state of tilt down switch/ OFF or ON	OFF: Tilt down switch not activated ON: Tilt down switch activated	-
      Tilt Up Switch	Input state of tilt up switch/ OFF or ON	OFF: Tilt up switch not activated ON: Tilt up switch activated	-

      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

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

   OK

2. CONFIRM DTC

   
   

   1. Clear the DTCs Click here.

   2. 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 I15 multiplex tilt and telescopic ECU connector.

   2. Disconnect the I26 tilt and telescopic switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I15-5 (VC) - I26-1 (VC) Always Below 1 Ω I15-18 (MSW) - I26-3 (MSW) I15-5 (VC) - Body ground 10 kΩ or higher I15-18 (MSW) - Body ground

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   
   1. 

      Text in Illustration

      *a	Component with harness connected (Multiplex Tilt and Telescopic ECU)

      Reconnect the I15 multiplex tilt and telescopic ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition I15-5 (VC) - I15-18 (MSW) Engine switch on (IG) 4.9 to 5.1 V

   
   

   NG

   REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

   OK

5. CHECK TILT AND TELESCOPIC SWITCH

   
   
   1. 

      Text in Illustration

      *a	Component without harness connected (Tilt and Telescopic Switch)

      Remove the tilt and telescopic switch Click here.

   2. 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

   
   

   NG

   REPLACE TILT AND TELESCOPIC SWITCH Click here

   OK

   REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here