Diagnosis Procedure
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".
- CHECK RECLINING SENSOR SIGNAL
- Turn ignition switch ON.
- Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.
Terminals Condition Voltage signal (+) (-) Driver seat control unit Terminal B202 9 Ground Seat reclining Operate Other than above 0 or 5 Fig 1: Checking Voltage Signal Between Driver Seat Control Unit Connector B202 And Ground Using OscilloscopeCourtesy of NISSAN NORTH AMERICA, INC.
Is the inspection result normal?
YES: GO TO 4
NO: GO TO 2
- CHECK RECLINING SENSOR CIRCUIT
- Turn ignition switch OFF.
- Disconnect driver seat control unit and reclining motor LH.
- Check continuity between driver seat control unit harness connector and reclining motor LH harness connector.
Driver seat control unit connector Terminal Reclining motor connector Terminal Continuity B202 (A) 9 B232 (B) 1 Yes 31 4 - Check continuity between driver seat control unit harness connector and ground.
Driver seat control unit connector Terminal Ground Continuity B202 (A) 9 No 31 Fig 2: Checking Continuity Between Driver Seat Control Unit Harness Connector B202 And Reclining Motor LH Harness Connector B232Courtesy of NISSAN NORTH AMERICA, INC.
Is the inspection result normal?
YES: GO TO 3
NO: Repair or replace harness.
- CHECK SEAT OPERATION
- Connect driver seat control unit and reclining motor LH.
- Check seat operation (except reclining operation) with memory function.
Is the operation normal?
YES: Replace reclining motor LH. Refer to "EXPLODED VIEW ".
NO: Replace driver seat control unit. Refer to "EXPLODED VIEW ".
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace driver seat control unit. Refer to "EXPLODED VIEW ".
NO: Repair or replace the malfunctioning part.