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DTC 46: Secondary Throttle Position Sensor (With TCS)

Check Power Supply

Turn ignition off and disconnect Secondary Throttle Position (TP) sensor harness connector. Turn ignition on. Measure voltage between TP sensor connector terminal "c" (Red/White 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, verify harness continuity between TP and ECM connectors. Repair harness or connectors as necessary.

Fig 1: Locating Secondary Throttle Position Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: DTC 46, Checking Power Supply
Courtesy of NISSAN MOTOR CO., U.S.A.

Check Ground Circuit

Turn ignition off. Verify harness continuity between TP sensor connector terminal "a" (Black/Yellow wire) and ground. If continuity is present, go to next step. SeeFig 1 and Fig 3 . If continuity is not present, verify harness continuity between TP sensor and ECM connectors. Repair harness or connectors as necessary.

Fig 3: DTC 46, Checking Ground Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

Check Input Signal Circuit I

Disconnect ECM harness connector and TCM harness connector. Verify harness continuity between ECM connector terminal No. 37 (Purple/White wire) and TCM connector terminal No. 4 (Purple/White wire). If continuity is present, go to next step. If continuity is not present, verify harness continuity between ECM connector and TCM connector. Repair harness or connectors as necessary. See Figure , Figure , Fig 4 and Fig 5 .

Fig 4: Locating Traction Control Module (TCM)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: DTC 46, Checking Input Signal Circuit I
Courtesy of NISSAN MOTOR CO., U.S.A.

Check Input Signal Circuit II

Verify harness continuity between TCM connector terminal No. 3 (White wire) and TP sensor connector terminal "b" (White wire). If continuity is present, go to next step. If continuity is not present, verify harness continuity between TCM connector and TP sensor connector. Repair harness or connectors as necessary. See Fig 6 .

Fig 6: DTC 46, Checking Input Signal Circuit II
Courtesy of NISSAN MOTOR CO., U.S.A.

Check Component

Inspect secondary throttle position sensor. See the SYSTEM/COMPONENT TESTS article. Replace secondary throttle position sensor if necessary. If secondary throttle position sensor is okay, check Traction Control Module (TCM) operation. See the TRACTION CONTROL SYSTEM article. Replace TCM if necessary. Check ECM pin terminals for damage or improper harness connection and perform FINAL CHECK.