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.

PROCEDURE

1. Click here

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

   
   
   1. 

      Turn the power switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the power switch on (IG).

   4. Turn the GTS on.

   5. Check the tilt and telescopic switch.

   6. Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.

      Table 1. 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.

      Table 2. Text in Illustration

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

   
   
   • OKClick here
   • NGClick here
2. Click here

   CONFIRM DTC

   
   

   1. Clear the DTCs (Click here).

   2. Check for DTCs (Click here).

      Table 3. Result

      Result	Proceed to
      DTCs are output.	A
      DTCs are not output.	B

   
   
   • A

     REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (Click here)

   • B

     USE SIMULATION METHOD TO CHECK (Click here)

3. Click here

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

   
   

   1. Disconnect the H12 multiplex tilt and telescopic ECU connector.

   2. Disconnect the H20 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 H12-5 (VC) - H20-1 (VC) Always Below 1 Ω H12-18 (MSW) - H20-3 (MSW) H12-5 (VC) - Body ground 10 kΩ or higher H12-18 (MSW) - Body ground

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)

   
   
   1. 

      Reconnect the H12 multiplex tilt and telescopic ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition H12-5 (VC) - H12-18 (MSW) Power switch on (IG) 4.9 to 5.1 V

      Table 4. Text in Illustration

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

   
   
   • OKClick here
   • NG

     REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (Click here)

5. Click here

   CHECK TILT AND TELESCOPIC SWITCH

   
   
   1. 

      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 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

      Table 5. Text in Illustration

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

   
   
   • OK

     REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (Click here)

   • NG

     REPLACE TILT AND TELESCOPIC SWITCH (Click here)