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Home >> Lexus >> 2013 >> LS 460 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission (Aa80F) (Diagnostic Codes & Circuit Tests) >> Automatic Transmission System >> Circuit Tests >> Pattern Select Switch Circuit >> Procedure

Pattern Select Switch Circuit: Procedure

  1. CHECK ECUS CONNECTED TO CAN BUS 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Check the ECUs connected to the CAN bus. Refer to DIAGNOSIS SYSTEM [09/2012 - ] .

      Result

      Result Proceed to
      No malfunction appears A
      Malfunction appears B

    B → See step   7 

    A: Go to next step 

  2. CHECK DTC (ALL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Check for DTCs.

      Result

      Condition Proceed to
      DTC is not output A
      CAN system DTC is output B
      LIN system DTC is output C

    B → See step   4 

    C → See step   5 

    A: Go to next step 

  3. READ VALUE USING DATA LIST (CENTER CONSOLE SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body / Center Console Switch / Data List.
    5. Read the value displayed on the Techstream.
      CENTER CONSOLE SWITCH

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ECT Snow Mode Switch Combination switch (SNOW) status/
      ON or OFF
      • ON: Combination switch (SNOW) pushed
      • OFF: Combination switch (SNOW) not pushed
      -
      SPORT Mode Switch Combination switch (SPORT) status/
      ON or OFF
      • ON: Combination switch being turned and held at SPORT position
      • OFF: Combination switch not turned
      -
      NORMAL Mode Switch Combination switch (NORMAL) status/
      ON or OFF
      • ON: Combination switch being pushed and held
      • OFF: Combination switch not pushed
      -

      OK

      On the Techstream screen, item changes between ON and OFF according to switch operation.

    NG → See step   6 

    OK → See step   8 

  4. GO TO CAN COMMUNICATION SYSTEM. Refer to  PRECAUTION [09/2012 - ] 
  5. GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2012 - ] 
  6. REPLACE COMBINATION SWITCH ASSEMBLY. Refer to  REMOVAL [09/2012 - ] 
  7. GO TO CAN COMMUNICATION SYSTEM. Refer to  PRECAUTION [09/2012 - ] 
  8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2012 - ]