DTC 11: Crankshaft Position (CKP) Sensor

Check Power Supply

Turn ignition off and disconnect CKP sensor harness connector. Turn ignition on. Measure voltage between CKP sensor harness connector terminal "B" (Orange wire) and ground. See Fig 1 and Fig 2 . If battery voltage is present, go to next step. If battery voltage is not present, verify harness continuity between CKP sensor and ECM (Orange wire), and between CKP sensor and ECCS relay (Orange wire). Repair harness or connectors as necessary.

Check Input Signal Circuit

Turn ignition off. Disconnect ECM harness connector. Verify harness continuity between terminal "C" (Yellow wire) and terminal No. 41 (one degree signal). Verify harness continuity between CKP sensor harness connector terminal "D" (Blue wire) and ECM harness connector terminals No. 40 and 44 (180-degree signal). See Figure , Figure and Fig 3 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.

Check Ground Circuit

Turn ignition off. Disconnect ECM harness connector. Verify harness continuity between CMP sensor connector terminal "A" (Black wire) and ground. See Figure , Figure and Fig 4 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.

Check Component

Inspect CKP sensor signal plate for damage or contamination. Check CKP and ECM harness connectors for damage, corrosion or pushed-out pins. Repair if necessary. If no problems are found, remove distributor. Disconnect ignition wires and injector sub-harness connectors.
Turn ignition on. While measuring voltage between ground and CKP harness connector terminals "C", voltage should fluxuate 0-5 volts at each one degree signal. See Fig 5 . While measuring voltage between ground and CKP harness connector terminals and "D", voltage should fluxuate 0-5 volts at 180 degree signal. If voltage is not as specified, replace distributor.

Fig 1: Locating CKP Sensor Harness Connector (G20)

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

Fig 2: DTC 11, Checking Power Supply (G20)

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

Fig 3: DTC 11, Checking Input Signal Circuit (G20)

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

Fig 4: DTC 11, Checking CMP Sensor Ground Circuit (G20)

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

Fig 5: DTC 11, Checking CMP Sensor (G20)

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