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.
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.
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 SYSTEM/COMPONENT TESTS article. Replace TPS if necessary and perform FINAL CHECK  .

Fig 1: Locating TPS Harness Connector (J30)

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

Fig 2: DTC 43, Checking Power Supply (J30)

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

Fig 3: DTC 43, Checking Ground Circuit (J30)

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

Fig 4: DTC 43, Checking Input Signal Circuit (J30)

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