DTC 43: Throttle Position Sensor (TPS)

1. Check Power Supply  - Turn ignition off and disconnect TPS harness connector. Turn ignition on. Measure voltage between TPS connector terminal "c" (Green wire) and ground. See Fig 1 and Fig 2 . If voltage is approximately 5 volts, go to next step. If voltage is not as specified, repair harness or connectors as necessary.
   Fig 1: Locating TPS Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: DTC 43, Checking Power Supply

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check Ground Circuit  - Turn ignition off. Verify harness continuity between TPS connector terminal "a" (Orange/Blue wire) and engine ground. See Fig 3 . If continuity is present, go to next step. If continuity is not present, verify harness continuity between TPS terminal "a" and ECM terminal No. 30 (Orange/Blue wire), and between automatic transmission control unit terminal No. 35 (48-pin connector located on driver side kick panel) and TPS terminal "b" (Orange/Blue wire). If continuity is not present, repair harness or connectors as necessary.
   Fig 3: DTC 43, Checking Ground Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check Input Signal Circuit  - Disconnect ECM harness connector. See Figure . Verify harness continuity between ECM connector terminal No. 38 and TPS connector terminal "b" (Black wire). See Figure and Fig 4 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
4. Check Component  - Inspect TPS. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Replace TPS if necessary and perform FINAL CHECK  .

Fig 4: DTC 43, Checking Input Signal Circuit

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