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

Fig 4: DTC 43, Checking Ground Circuit

G93H78565

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

Fig 5: DTC 43, Checking Input Signal Circuit

G93I78566

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