Inspection Procedure

HINT

The wire harness between the multiplex tilt and telescopic ECU and telescopic motor is provided with the steering column assembly.

1. PERFORM ACTIVE TEST USING TECHSTREAM 
   1. Turn the engine switch off.
   2. Connect the Techstream to the DLC3
   3. Turn the engine switch on (IG)
   4. Turn the Techstream on
   5. Check that the steering column contracts and extends Enter the following menus: Chassis / Tilt & Telescopic / Active Test
      Fig 1: Checking Steering Column

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Tilt & Telescopic 

      ACTIVE TEST DETAIL
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      Telesco	Telesco operation	Operation LONG/SHORT	-

      OK: Steering column contracts and extends. 

   NG: Go to step  4

   OK: Go to next step 

2. INSPECT MULTIPLEX TILT AND TELESCOPIC ECU (VCE TERMINAL VOLTAGE) 
   1. Measure the voltage according to the value (s) in the table below

      Standard Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      A-3 (VCE) - A-5 (E2)	Engine switch on (IG)	8 to 16 V

   NG: Go to step  5

   Fig 2: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

3. INSPECT TELESCOPIC POSITION SENSOR 
   1. Measure the voltage according to the value (s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      A-4 (TES) - A-5 (E2)	Telescopic steering contracts or extends	11 to 14 V (Pulse HI)
      		Below 1 V (Pulse LOW)

   NG: REPLACE STEERING COLUMN ASSEMBLY  (See REMOVAL  )

   Fig 3: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE MULTIPLEX TILT AND TELESCOPIC ECU  (See REMOVAL  )

4. INSPECT TELESCOPIC MOTOR 
   1. Disconnect connector A from the multiplex tilt and telescopic ECU.
   2. Connect a positive battery lead to terminal A-2 (TEM+) and a negative battery lead to terminal A-6 (TEM-) of the telescopic motor connector. Then confirm that the steering column contracts.

      OK: Steering column contracts. 

   3. Connect a negative battery lead to terminal A-2 (TEM+) and a positive battery lead to terminal A-6 (TEM-) of the telescopic motor connector. Then confirm that the steering column extends.

      OK: Steering column extends. 

   NG: REPLACE STEERING COLUMN ASSEMBLY  (See REMOVAL  )

   Fig 4: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE MULTIPLEX TILT AND TELESCOPIC ECU  (See REMOVAL  )

5. CHECK HARNESS AND CONNECTOR (ECU - BODY GROUND (VCE CIRCUIT)) 
   1. Disconnect connector A from the multiplex tilt and telescopic ECU.
   2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      A-3 (VCE) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 5: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

6. CHECK HARNESS AND CONNECTOR (ECU - BODY GROUND (GND CIRCUIT)) 
   1. Disconnect the J28 connector from the multiplex tilt and telescopic ECU.
   2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      J28-11 (GND) - Body ground	Always	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 6: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE MULTIPLEX TILT AND TELESCOPIC ECU  (See REMOVAL  )