Nissan Maxima Service and Repair Manual: Seat belt buckle switch signal circuit

Description

Transmits a seat belt buckle switch LH signal to the combination meter.

Component Function Check

1. CHECK COMBINATION METER INPUT SIGNAL

  1. Start engine.
  2. Monitor seat belt warning lamp while fastening and unfastening the driver seat belt.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to WCS-54, "Wiring Diagram".

1. CHECK COMBINATION METER INPUT SIGNAL

  1. Turn ignition switch ON.
  2. Check voltage between combination meter harness connector M24 terminal 35 and ground.

2. CHECK SEAT BELT BUCKLE SWITCH LH CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect combination meter and seat belt buckle switch LH.
  3. Check continuity between combination meter harness connector M24 terminal 35 and seat belt buckle switch LH harness connector B202 terminal 1.
  4. Check harness continuity between combination meter harness connector M24 terminal 35 and ground.

3. CHECK SEAT BELT BUCKLE SWITCH LH GROUND CIRCUIT

Check harness continuity between seat belt buckle switch LH harness connector B202 terminal 2 and ground.

Component Inspection

 CHECK SEAT BELT BUCKLE SWITCH LH

  1. Turn ignition switch OFF.
  2. Disconnect the seat belt buckle switch LH connector.
  3. Check continuity between the seat belt buckle LH terminals 1 and 2.
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