DTC 13: Engine Coolant Temperature (ECT) Sensor

WARNING: This page is about a different variant/trim than selected.

Check Power Supply - Turn ignition off. Disconnect ECT sensor harness connector. See Fig 1 . Turn ignition on. Measure voltage between ECT sensor harness connector terminal "b" (Gray wire) and ground. See Fig 2 . If voltage is about 5 volts, go to next step. If voltage is not as specified, repair harness or connectors as necessary.
Check Ground Circuit - Turn ignition off. Check continuity between terminal "a" (Blue/Orange wire) and engine ground. See Fig 3 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
Check Component - Inspect ECT sensor. See SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section. Replace ECT sensor if necessary and perform FINAL CHECK in this article. If ECT sensor is okay, check ECM pin terminals and wiring harness connector and repair as necessary.

Fig 1: Locating ECT Sensor Harness Connector (Sentra)

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

Fig 2: DTC 13, Checking Power Supply (Sentra)

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

Fig 3: DTC 13, Checking Ground Circuit (Sentra)

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