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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Seat Belt Control System (DTC/Circuit Diagnosis) (Except Hybrid)) >> DTC/Circuit Diagnosis >> Seat Belt Buckle Switch (Driver Side) >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CHECK PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE) OUTPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Disconnect seat belt buckle switch (driver seat) harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between seat belt buckle switch (driver seat) harness connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      Seat belt buckle switch (driver seat)
      Connector Terminal
      B221 2 Ground 5

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SEAT) CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect pre-crash seat belt control unit (driver side) harness connector.
    3. Check continuity between pre-crash seat belt control unit (driver side) harness connector and seat belt buckle switch (driver seat) harness connector.
      Pre-crash seat belt control unit (driver side) Seat belt buckle switch (driver seat) Continuity
      Connector Terminal Connector Terminal
      B58 6 B221 2 Yes
    4. Check continuity between pre-crash seat belt control unit (driver side) harness connector and ground.
      Pre-crash seat belt control unit (driver side) Ground Continuity
      Connector Terminal
      B58 6 No

    Is the inspection result normal?

    YES 

    Replace pre-crash seat belt control unit (driver side). Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness or connector.

  3. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SEAT) GROUND CIRCUIT

    Check continuity between seat belt buckle switch (driver seat) and ground.

    Seat belt buckle switch (driver seat) Ground Continuity
    Connector Terminal
    B221 3 Yes

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace harness or connector.

  4. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SEAT)

    Check seat belt buckle switch (driver seat). Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

    Replace seat belt buckle switch (driver seat). Refer to REMOVAL AND INSTALLATION .

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