Mechanics

CRANKSHAFT POSITION SENSOR A CIRCUIT

1997 Nissan Truck

Engine Mechanical problem
1997 Nissan Truck 4 cyl Four Wheel Drive Manual 150, 00 miles

i just failed a smok check because of the crankshaft position sensor A circuit. Can you please tell me what that means and how to fix it. Thank you
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Kalaka
September 27, 2008.




TESTS W/CODES -1997 Nissan Pickup
Page 1 of 1
DTC P0335 OR P1336: CRANKSHAFT POSITION (CKP) SENSOR
1. Check Ground Circuit - Turn ignition off. Disconnect CKP sensor harness connector. See Fig. 12 . Using an ohmmeter, check continuity between CKP sensor harness connector terminal No. 2 (Green wire) and ground. If no continuity exists, repair open in Green wire. If continuity exists, go to next step. 2. Check Input Signal Circuit - Leave ignition off. Disconnect ECM harness connector. See Fig. 1 . Using an ohmmeter, check continuity between ECM harness connect or terminal No. 53 and CKP sensor harness connector terminal No. 1 (Red wire). See Fig. 3 . If no continuity exists, repair open in Red wire. If continuity exists, go to next step. 3. Check Component - Verify flywheel gear teeth are not damaged. If chipping or damage is observed, replace flywheel or drive plate. Disconnect and remove CKP sensor. Loosen sensor fixing bolt. With ambient temperature about 68 F (20 C), measure resistance between CKP sensor terminals. Resistance should be 167-204 ohms. If resistance is as specified, go to next step. If resistance is not as specified, replace CKP sensor. 4.Disconnect ECM wiring harness connector. Check connector pins for damage or corrosion. Check all circuit connectors for clean, tight fit and service if necessary. If fault is still present, replace CKP sensor.
Fig. 12: Locating CKP Sensor Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.


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Merlin2021
Sep 27, 2008.


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