Download Ignition System Service Manual ’03 Nissan-Datsun Altima – Testing and Inspection Component Inspection CRANKSHAFT POSITION SENSOR (POS) 1. Loosen the fixing bolt of the sensor. 2. Disconnect crankshaft position sensor (POS) harness connector. 3. Remove the sensor. 5. Check resistance as shown in the figure. 6. If NG, replace crankshaft position sensor (POS). REMOVAL 1. Remove the rocker cover. 2. Remove the front right side tire and wheel using power tool. 3. Remove the RH splash shield using power tool. 4. Remove the auxiliary drive belt. 5. Remove the coolant overflow reservoir tank. 6. Remove the IVTC (intake valve timing control) cover by cutting the sealant using the Tool. Loosen the bolts in the order shown. Set the No.1 cylinder at TDC on its compression stroke with the following procedure: 7. a. Open the splash cover on RH under cover. b. Rotate crankshaft pulley clockwise, and align mating marks for TDC with timing indicator on front cover, as shown. c. At the same time, make sure that the mating marks on camshaft sprockets are lined up with the yellow links in the timing chain, as shown. If not, rotate crankshaft pulley one more turn to line up the mating marks to the yellow links, as shown.