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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Wheels & Tires System (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> DTC C1708, C1709, C1710, C1711: Tire Pressure Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK TIRE PRESSURE SIGNAL 

    SYMBOL With CONSULT

    1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
    2. Stop the vehicle.
    3. Select "DATA MONITOR" for "AIR PRESSURE MONITOR" with CONSULT.
    4. Within 5 minutes after vehicle stopped, read the values that are displayed for "AIR PRESS FL", "AIR PRESS FR", "AIR PRESS RR", and "AIR PRESS RL".

    Are all tire pressures displayed 0 kPa (psi)?

    YES

    GO TO 2.

    NO

    GO TO 5.

  2. CHECK RECEIVER CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Disconnect low tire pressure warning control unit harness connector and tire pressure receiver harness connector.
    3. Check the continuity between low tire pressure warning control unit harness connector and tire pressure receiver harness connector.
      CHECK RECEIVER POWER CIRCUIT

      Low tire pressure warning control unit

      Tire pressure receiver

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M43

      10

      E58 (Front LH)

      1

      Existed

      9

      E28 (Front RH)

      8

      B13 (Rear LH)

      7

      B213 (Rear RH)
      CHECK RECEIVER SIGNAL CIRCUIT

      Low tire pressure warning control unit

      Tire pressure receiver

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M43

      6

      E58 (Front LH)

      3

      Existed

      5

      E28 (Front RH)

      4

      B13 (Rear LH)

      3

      B213 (Rear RH)
      CHECK RECEIVER SIGNAL (SENSITIVITY) CIRCUIT

      Low tire pressure warning control unit

      Tire pressure receiver

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M43

      22

      E58 (Front LH)

      2

      Existed

      21

      E28 (Front RH)

      20

      B13 (Rear LH)

      19

      B213 (Rear RH)
      CHECK RECEIVER GROUND CIRCUIT

      Low tire pressure warning control unit

      Tire pressure receiver

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M43

      26

      E58 (Front LH)

      4

      Existed

      25

      E28 (Front RH)

      24

      B13 (Rear LH)

      23

      B213 (Rear RH)
    4. Check the continuity between low tire pressure warning control unit harness connector and ground.
      CHECK RECEIVER POWER CIRCUIT

      Low tire pressure warning control unit

      --

      Continuity

      Connector

      Terminal

      M43

      10

      Ground

      Not existed

      9

      8

      7
      CHECK RECEIVER SIGNAL CIRCUIT

      Low tire pressure warning control unit

      --

      Continuity

      Connector

      Terminal

      M43

      6

      Ground

      Not existed

      5

      4

      3
      CHECK RECEIVER SIGNAL (SENSITIVITY) CIRCUIT

      Low tire pressure warning control unit

      --

      Continuity

      Connector

      Terminal

      M43

      22

      Ground

      Not existed

      21

      20

      19
      CHECK RECEIVER GROUND CIRCUIT

      Low tire pressure warning control unit

      --

      Continuity

      Connector

      Terminal

      M43

      26

      Ground

      Not existed

      25

      24

      23

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace the malfunctioning harness or connector.

  3. CHECK TIRE PRESSURE RECEIVER POWER SUPPLY CIRCUIT 
    1. Connect low tire pressure warning control unit harness connector.
    2. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    3. Check the voltage between tire pressure receiver harness connector and ground.

      Tire pressure receiver

      --

      Voltage

      Connector

      Terminal

      E58 (Front LH)

      1

      Ground

      Approx. 7 - 16 V

      E28 (Front RH)

      B13 (Rear LH)

      B213 (Rear RH)

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Replace the low tire pressure warning control unit. Refer to Removal and Installation .

  4. TIRE PRESSURE RECEIVER SIGNAL 

    Check tire pressure receiver signal. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace error-detected parts.

  5. TIRE PRESSURE SENSOR ID REGISTRATION 

    Perform tire pressure sensor ID registration. Refer to Description .

    Is tire pressure sensor ID registration completed?

    YES

    GO TO 6.

    NO

    Replace applicable tire pressure sensor. Refer to Removal and Installation .

  6. CHECK TIRE PRESSURE SIGNAL 

    SYMBOL With CONSULT

    1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
    2. Stop the vehicle.
    3. Select "DATA MONITOR" for "AIR PRESSURE MONITOR" with CONSULT.
    4. Within 15 minutes after vehicle stopped, check that the tire pressures match the standard value.

      Monitor item

      Displayed value

      AIR PRESS FL

      Approximately equal to the indication on tire gauge value for front LH tire

      AIR PRESS FR

      Approximately equal to the indication on tire gauge value for front RH tire

      AIR PRESS RR

      Approximately equal to the indication on tire gauge value for rear RH tire

      AIR PRESS RL

      Approximately equal to the indication on tire gauge value for rear LH tire

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace the low tire pressure warning control unit. Refer to Removal and Installation .

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