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DTC B2416: Height Control Sensor Malfunction: Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream on.
    3. Select the items below in the DATA LIST, and read the displays on the Techstream.
      AFS (AFS ECU)

      Item Measurement Item / Display (Range) Normal Condition Diagnostic Note
      Fr Height Sens Signal Val Front height sensor signal value / 0 to 5 V Approx. 2.5 V -
      Rr Height Sens Signal Val Rear height sensor signal value / 0 to 5 V Approx. 2.5 V -

      OK

      Condition sign can be displayed.

      Result

      Result Proceed to
      OK (When checking from PROBLEM SYMPTOMS TABLE) A
      OK (When checking from DIAGNOSTIC TROUBLE CODE CHART) B
      NG C

    C → See step   2 

    B → REPLACE AFS ECU 

    A → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  2. CHECK WIRE HARNESS (FRONT HEIGHT CONTROL SENSOR CIRCUIT) 
    1. Disconnect the A20 or q4 height control sensor connector.
      Fig 1: Checking Wire Harness (Front Height Control Sensor Circuit)
      GTY102948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage of the wire harness side connector.

      Standard voltage

      2GR-FSE 

      1UR-FSE 

      Tester Connection Condition Specified Condition
      A20-1 - A20-3 Engine switch on (IG) 4.5 to 5.5 V
      Tester Connection Condition Specified Condition
      q4-1 - q4-3 Engine switch on (IG) 4.5 to 5.5 V

    NG → See step   8 

    OK: Go to next step 

  3. CHECK WIRE HARNESS (REAR HEIGHT CONTROL SENSOR CIRCUIT) 
    1. Disconnect the o2 height control sensor connector.
      Fig 2: Identifying Rear Height Control Sensor Connector Terminals
      GTY108007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage of the wire harness side connector.

      Standard voltage

      Tester Connection Condition Specified Condition
      o2-1 - o2-3 Engine switch on (IG) 4.5 to 5.5 V

    NG → See step   9 

    OK: Go to next step 

  4. CHECK WIRE HARNESS (AFS ECU - HEIGHT CONTROL SENSOR FRONT) 
    1. Disconnect the A28 AFS ECU connector.
      Fig 3: Checking Wire Harness (AFS ECU - Height Control Sensor Front)
      GTY108008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connectors.

      Standard resistance

      2GR-FSE 

      1UR-FSE 

      Tester Connection Condition Specified Condition
      A28-2 (SHFL) - A20-2 (SHFL) Always Below 1 Ω
      A28-2 (SHFL) - Body ground Always 10 kΩ or higher
      Tester Connection Condition Specified Condition
      A28-2 (SHFL) - q4-2 (SHFL) Always Below 1 Ω
      A28-2 (SHFL) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  5. CHECK WIRE HARNESS (AFS ECU - HEIGHT CONTROL SENSOR REAR) 
    1. Disconnect the o2 sensor connector.
      Fig 4: Checking Wire Harness (AFS ECU - Height Control Sensor Rear)
      GTY108009Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A29 AFS ECU connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Condition Specified Condition
      A29-9 (SHRL) - o2-2 (SHRL) Always Below 1 Ω
      A29-9 (SHRL) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  6. INSPECT HEIGHT CONTROL SENSOR (FRONT LH) 
    1. Connect the 3 dry cell batteries (1.5 V) in series.
      Fig 5: Inspecting Height Control Sensor (Front LH)
      GTY108012Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the height control sensor assembly front.
    3. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead from the battery to terminal 1.
    4. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down.

      Standard voltage

      Tester Connection Condition Specified Condition
      2 (SHFL) - 1 (SHG) +45° Approx. 4.5 V
      2 (SHFL) - 1 (SHG) 0° (Normal) Approx. 2.5 V
      2 (SHFL) - 1 (SHG) -45° (Low) Approx. 0.5 V

    NG → REPLACE HEIGHT CONTROL SENSOR (FRONT LH) 

    OK: Go to next step 

  7. INSPECT HEIGHT CONTROL SENSOR (REAR LH) 
    1. Connect the 3 dry cell batteries (1.5 V) in series.
      Fig 6: Connecting Positive Lead From Battery To Terminal 3 And Negative From Battery To Terminal 1
      GTY108011Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the height control sensor assembly rear.
    3. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead from the battery to terminal 1.
    4. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down.

      Standard voltage

      Tester Connection Condition Specified Condition
      2 (SHRL) - 1 (SHG) +45° Approx. 4.5 V
      2 (SHRL) - 1 (SHG) 0° (Normal) Approx. 2.5 V
      2 (SHRL) - 1 (SHG) -45° (Low) Approx. 0.5 V

      Result

      Result Proceed to
      OK (When checking from DIAGNOSTICS TROUBLE CODE CHART) A
      OK (When checking from PROBLEM SYMPTOMS TABLE) B
      NG C

    C → REPLACE HEIGHT CONTROL SENSOR (REAR LH) 

    B → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    A → REPLACE AFS ECU 

  8. CHECK AFS ECU 
    1. Measure the voltage of the connector.
      Fig 7: Checking AFS ECU
      GTY101872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Condition Specified Condition
      A28-1 (SBF) - A28-17 (SGF) Engine switch on (IG) 4.5 to 5.5 V

      Result

      Result Proceed to
      OK A
      NG (When checking from DIAGNOSTICS TROUBLE CODE CHART) B
      NG (When checking from PROBLEM SYMPTOMS TABLE) C

    C → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    B → REPLACE AFS ECU 

    A → REPAIR OR REPLACE HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR FRONT) 

  9. CHECK AFS ECU 
    1. Measure the voltage of the connector.
      Fig 8: Checking AFS ECU
      GTY101862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Condition Specified Condition
      A29-10 (SBR) - A29-20 (SGR) Engine switch on (IG) 4.5 to 5.5 V

      Result

      Result Proceed to
      OK A
      NG (When checking from the DIAGNOSTICS TROUBLE CODE CHART) B
      NG (When checking from the PROBLEM SYMPTOMS TABLE) C

    C → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    B → REPLACE AFS ECU 

    A → REPAIR OR REPLACE HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR REAR) 

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