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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 (Passenger 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 (PASSENGER SEAT) OUTPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Disconnect seat belt buckle switch (passenger seat) harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between seat belt buckle switch (passenger seat) harness connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      Seat belt buckle switch (passenger seat)
      Connector Terminal
      B303 2 Ground 5

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

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

    1. Turn ignition switch OFF.
    2. Disconnect pre-crash seat belt control unit (passenger side) harness connector.
    3. Check continuity between pre-crash seat belt control unit (passenger side) harness connector and seat belt buckle switch (passenger seat) harness connector.
      Pre-crash seat belt control unit (passenger side) Seat belt buckle switch (passenger seat) Continuity
      Connector Terminal Connector Terminal
      B160 6 B303 2 Yes
    4. Check continuity between pre-crash seat belt control unit (passenger side) harness connector and ground.
      Pre-crash seat belt control unit (passenger side) Ground Continuity
      Connector Terminal
      B160 6 No

    Is the inspection result normal?

    YES 

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

    NO 

    Repair or replace harness or connector.

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

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

    Seat belt buckle switch (passenger seat) Ground Continuity
    Connector Terminal
    B303 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 (PASSENGER SEAT)

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

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

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

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