LIGHTING SYSTEM, Diagnostic DTC:B2416

DTC Code DTC Name
B2416 Height Control Sensor Malfunction

DESCRIPTION

w/ Coil Suspension:

The AFS ECU receives signals indicating the height of the vehicle from the height control sensor.

w/ Air Suspension:

The AFS ECU receives signals indicating the height of the vehicle from the suspension control ECU.

w/ Coil Suspension
DTC Code DTC Detection Condition Trouble Area
B2416

  • Malfunction in height control sensor

  • Open or short in height control sensor circuit

  • Height control sensor

  • Wire harness

  • AFS ECU
w/ Air Suspension
DTC Code DTC Detection Condition Trouble Area
B2416

  • Malfunction in suspension control ECU

  • Open or short in suspension control ECU circuit

  • Suspension control ECU

  • Wire harness

  • AFS ECU

WIRING DIAGRAM

A001F2YE08
w/ Coil Suspension
*a Front Height Control Sensor LH
*b Rear Height Control Sensor LH
A001ER6E01
w/ Air Suspension
*1 Suspension Control ECU

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  2. CHECK DTC


    1. Check for DTC Click here.

      OK
      DTC B2416 output does not occur.

    OK

    NORMAL

    NG

  3. CHECK VEHICLE SYSTEM


    1. Check vehicle system.

      Result:
      Result Proceed to
      w/ Coil Suspension A
      w/ Air Suspension B

    B

    CHECK DTC (AIR SUSPENSION SYSTEM) Click here

    A

  4. READ VALUE USING GTS (HEIGHT CONTROL SENSOR)


    1. Using the GTS, read the Data List.

      AFS*1 or AHS*2
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Rr Height Sens Signal Val Rear height control sensor signal/Min.: 0 V, Max.: 5 V Height control sensor vehicle height value -
      Height Sens Pw Supply Val Height control sensor power supply value/Min.: 0 V, Max.: 6.25 V Power supply voltage to height control sensor -

      • *1: w/o Adaptive High Beam System

      • *2: w/ Adaptive High Beam System

      OK
      Normal conditions listed above are displayed.

    OK

    REPLACE AFS ECU Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR)


    1. Disconnect the A37 ECU connector.

      A001F4IE01
      *1 Rear view of wire harness connector: (to AFS ECU)
      *2 Front view of wire harness connector: (to Front Height Control Sensor)
      *3 Front view of wire harness connector: (to Rear Height Control Sensor)

    2. Disconnect the S78 and A4 sensor connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A37-18 (SBR) - S78-2 (SHB) Always Below 1 Ω
      A37-19 (SHRL) - S78-1 (SHRL) Always Below 1 Ω
      A37-21 (SGR) - S78-5 (SHG) Always Below 1 Ω
      A37-18 (SBR) - Body ground Always 10 kΩ or higher
      A37-19 (SHRL) - Body ground Always 10 kΩ or higher
      A37-21 (SGR) - Body ground Always 10 kΩ or higher
      A37-17 (SHFL) - A4-2 (SHFL) Always Below 1 Ω
      A37-18 (SBR) - A4-3 (SHB) Always Below 1 Ω
      A37-21 (SGR) - A4-1 (SHG) Always Below 1 Ω
      A37-17 (SHFL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK AFS ECU (SBR - SGR VOLTAGE)


    1. A001FZ3E01
      *1 Component with harness connected: (AFS ECU)

      Reconnect the A37 ECU connector.

    2. Turn the engine switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A37-18 (SBR) - A37-21 (SGR) Engine switch on (IG) 4.5 to 5.5 V

    NG

    REPLACE AFS ECU Click here

    OK

  7. INSPECT FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY


    1. A001AHNE01
      *1 - 45° (Low)
      *2 + 45° (High)

      Connect 3 dry cell batteries (1.5 V) in series.

    2. Connect the positive (+) lead from the batteries to terminal 3, and the negative (-) lead from the batteries to terminal 1.

    3. 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° (High) 4.05 V
      +45° (Normal) 2.25 V
      -45° (Low) 0.45 V

    NG

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY Click here

    OK

  8. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY


    1. A001B0PE01
      *1 - 45° (Low)
      *2 + 45° (High)

      Connect 3 dry cell batteries (1.5 V) in series.

    2. Connect the positive (+) lead from the batteries to terminal 3, and the negative (-) lead from the batteries to terminal 1.

    3. 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° (High) 4.05 V
      0° (Normal) 2.25 V
      -45° (Low) 0.45 V

    NG

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY Click here

    OK

  9. INSPECT SKID CONTROL SENSOR WIRE


    1. A001E6YE02
      *1 Component without harness connected: (Skid Control Sensor Wire)
      *2 Vehicle Side
      *3 Sensor Side

      Disconnect the S78 and A wire connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A-1 - S78-5 (SHG) Always Below 1 Ω
      A-2 - S78-1 (SHRL) Always Below 1 Ω
      A-3 - S78-2 (SHB) Always Below 1 Ω
      A-1 - Body ground Always 10 kΩ or higher
      A-2 - Body ground Always 10 kΩ or higher
      A-3 - Body ground Always 10 kΩ or higher

    OK

    REPLACE AFS ECU Click here

    NG

    REPLACE SKID CONTROL SENSOR WIRE Click here

  10. CHECK DTC (AIR SUSPENSION SYSTEM)


    1. Check for DTC Click here.

      Result
      Result Proceed to
      DTC "C1712 Front Height Control Sensor LH Circuit Malfunction" and "C1714 Rear Height Control Sensor LH Circuit Malfunction" output do not occur A
      DTC "C1712 Front Height Control Sensor LH Circuit Malfunction" or "C1714 Rear Height Control Sensor LH Circuit Malfunction" output occurs B

    B

    GO TO AIR SUSPENSION SYSTEM Click here

    A

  11. READ VALUE USING GTS (AFS ECU)


    1. Using the GTS, read the Data List.

      AFS*1 or AHS*2
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Height Sens Pw Supply Val Height control sensor power supply value/Min.: 0 V, Max.: 6.25 V Power supply voltage to height control sensor -
      Fr Height Sens Signal Val Front height control sensor signal/Min.: 0 V, Max.: 5 V Height control sensor vehicle height value -
      Rr Height Sens Signal Val Rear height control sensor signal/Min.: 0 V, Max.: 5 V Height control sensor vehicle height value -

      • *1: w/o Adaptive High Beam System

      • *2: w/ Adaptive High Beam System


    OK

    REPLACE AFS ECU Click here

    NG

  12. CHECK SUSPENSION CONTROL ECU


    1. A0019C9E03
      *1 Component with harness connected: (Suspension Control ECU)

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A39-23 (SBL3) - A39-24 (SGL3) Engine switch on (IG) 5 V
      A39-21 (SHF2) - A39-24 (SGL3) While engine is running, height control switch is changed from HIGH to NORM, and vehicle height adjustment is finished 2.5 V
      A39-19 (SHR2) - A39-24 (SGL3) While engine is running, height control switch is changed from HIGH to NORM, and vehicle height adjustment is finished 2.5 V

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A39-24 (SGL3) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE SUSPENSION CONTROL ECU Click here

    C

    REPLACE SUSPENSION CONTROL ECU Click here

    A

  13. CHECK HARNESS AND CONNECTOR (AFS ECU - SUSPENSION CONTROL ECU)


    1. A001E6AE03
      *1 Front view of wire harness connector: (to AFS ECU)
      *2 Front view of wire harness connector: (to Suspension Control ECU)

      Disconnect the A37 and A39 ECU connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A37-17 (SHFL) - A39-21 (SHF2) Always Below 1 Ω
      A37-18 (SBR) - A39-23 (SBL3) Always Below 1 Ω
      A37-19 (SHRL) - A39-19 (SHR2) Always Below 1 Ω
      A37-21 (SGR) - A39-24 (SGL3) Always Below 1 Ω
      A37-17 (SHFL) - Body ground Always 10 kΩ or higher
      A37-18 (SBR) - Body ground Always 10 kΩ or higher
      A37-19 (SHRL) - Body ground Always 10 kΩ or higher
      A37-21 (SGR) - Body ground Always 10 kΩ or higher

    OK

    REPLACE AFS ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR