DTC 43: Throttle Position Sensor (TPS)

Check Power Supply - Turn ignition off and disconnect TPS harness connector. Turn ignition on. Measure voltage between TPS connector terminal "c" (Red/White wire) and ground. See Fig 1 , Fig 2 and Fig 3 . 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 (Without TCS)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Locating TPS Harness Connector (With TCS)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: DTC 43, Checking Power Supply
Courtesy of NISSAN MOTOR CO., U.S.A.
Check Ground Circuit - Turn ignition off. Verify harness continuity between TPS connector terminal "a" (Black/Yellow wire) and engine ground. See Fig 4 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
Check Input Signal Circuit - Disconnect ECM harness connector. See Figure . Verify harness continuity between ECM connector terminal No. 38 and TPS connector terminal "b" (White wire). See Figure and Fig 5 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
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 Ground Circuit

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

Fig 5: DTC 43, Checking Input Signal Circuit

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