DTC 103: Inhibitor/Neutral Position Switch

NOTE: Steps 1-3 are for A/T models. For M/T models, go to step 4.

1. Check Ground Circuit
   
   Turn ignition off. Disconnect inhibitor switch wiring harness connector. Check continuity between connector terminal "A" (Black wire) and body ground. See Fig 1 and Fig 2 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
2. Check Input Signal Circuit
   
   Check continuity between switch connector terminal "B" (Brown/White wire) and ECM harness connector terminal No. 22. See Fig 4 . If continuity is not present, repair harness or connectors as necessary.
3. Check Component
   
   Ensure inhibitor switch is not damaged or contaminated. Check inhibitor switch and ECM harness connectors for damage, corrosion or pushed-out pins. Repair if necessary. If no problems are found, replace inhibitor switch.
   Fig 1: Locating Neutral Position Switch Harness Connector (G20)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: DTC 103, Checking Ground Circuit (G20)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 3: DTC 103, Checking Input Signal Circuit (G20)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   NOTE: Steps 4-6 are for M/T models. For A/T models, go to step 1.
4. Check Ground Circuit
   
   Turn ignition off. Disconnect neutral position switch wiring harness connector. Check continuity between connector terminal "B" (Black wire) and body ground. See Fig 4 and Fig 5 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
5. Check Input Signal Circuit
   
   Check continuity between switch connector terminal "A" (Brown/White wire) and ECM harness connector terminal No. 22. See Fig 6 . If continuity is not present, repair harness or connectors as necessary.
6. Check Component
   
   Ensure neutral position switch is not damaged or contaminated. Check neutral position switch and ECM harness connectors for damage, corrosion or pushed-out pins. Repair if necessary. If no problems are found, replace neutral position switch.

Fig 4: Locating Inhibitor Switch Harness Connector (G20)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: DTC 103, Checking Ground Circuit (G20)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 6: DTC 103, Checking Input Signal Circuit (G20)

Courtesy of NISSAN MOTOR CO., U.S.A.