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If an applied vehicle exhibits one or more of the following symptoms: • • • MIL “ON” with DTC P0340 (Camshaft Position Sensor) stored in Self Diagnosis results, Engine stumbles momentarily during cruise condition, Engine stops running at idle, The cause of this incident may be the ignition coils. A new resistor assembly (located inside the ignition coil tube) is available to repair the described symptoms, if they should occur. SERVICE PROCEDURE 1. Verify that the vehicle has one or more of the symptoms listed above in the Service Information. 2. Remove all four ignition coils. Refer to the appropriate 2002 Service Manual for removal procedure of the ignition coils (page EM-26 for Altima, page EM-106 for Sentra). 3. Install the new resistor assembly in all four ignition coil tubes as follows: A. Pull the rubber boot away from the ignition coil. Then, twist and pull the ignition coil tube from the ignition coil to separate them (see Figure 1). Rubber boot Tube Ignition coil Figure 1 TP010651 B. Remove the spring from the ignition coil tube and discard. Insert the new resistor assembly into the ignition coil tube exactly as shown in Figure 2 below. C. Assemble the ignition coil tube to the ignition coil. • Rotate the tube while pressing onto the coil. • A “pop” sound will be heard when the rubber boot is seated correctly to the ignition coil. • Ensure there are no gaps and bulges between the coil body and the rubber boot (see Figure 3).

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2002 Altima (L31) with 2.5 Liter Engine (QR25DE) Only 2002 Sentra (B15) with 2.5 Liter Engine (QR25DE) OnlyIf an applied vehicle exhibits one or more of the following symptoms; ^ MIL “ON” with DTC P0340 (Camshaft Position Sensor) stored in Self Diagnosis results, ^ Engine stumbles momentarily during cruise condition, ^ Engine stops running at idle, The cause of this incident may be the ignition coils. A new resistor assembly (located inside the ignition coil tube) is available to repair the described symptoms, if they should occur. SERVICE PROCEDURE 1. Verify that the vehicle has one or more of the symptoms listed above in the Service Information. 2. Remove all four ignition coils. Refer to the appropriate 2002 Service Manual for removal procedure of the ignition coils (page EM-26 for Altima, page EM-106 for Sentra). 3. Install the new resistor assembly in all four ignition coil tubes as follows;

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1. 2. 3. 4. 5. Disconnect all the electrical connectors at the ignition control module. Note position of spark plug wires for installation and disconnect the spark plug wires from ignition coils. Remove the screws securing coil assemblies to ignition control module. Disconnect the coils from ignition control module. Remove the ignition control module from the bracket. INSTALLATION PROCEDURE 1. Install the ignition control module on the bracket. 2. Install the coils to ignition control module. NOTE: Refer to Fastener Notice in Service Precautions. 3. Reinstall the screws. Tighten Tighten the screws to 4.5 N.m (40 lb in). 4. Connect the spark plug wires as noted during removal. 5. Connect the electrical connectors to the ignition control module.

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NOTE: This procedure applies to either the left or right cylinder head cover. 1. 2. 3. 4. 5. 6. 7. Disconnect negative battery cable. Remove upper intake manifold. Disconnect electrical connectors from ignition coils and capacitor. Reposition electrical harness. Remove ground strap from right cylinder head. Disconnect electrical and vacuum harness retaining clips from cylinder head cover studs. Remove fasteners attaching ignition coil capacitors. Remove ignition coils. 8. Loosen all cylinder head cover fasteners (Fig. 27). NOTE: Cylinder head cover attaching bolts are captured to the cover. CAUTION: Make certain the double ended studs in the center of the cylinder head cover are loose before attempting to remove cover (Fig. 27). 9. Remove cylinder head cover(s). INSTALLATION

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Before disconnecting the battery, ensure all text and cautions in the battery disconnection section are observed. Remove 1. Disconnect battery earth lead. 2. Remove air intake hose. 3. Remove LH ignition coil cover. 4. Remove RH ignition coil cover. 5. Disconnect multiplugs from ignition coils. 6. Disconnect multiplugs from throttle body, thermostat heater, CMP sensor and ECT sensor. 7. Cut 2 cable ties and release engine harness. 8. Disconnect multiplugs from VCC solenoids. 9. Release VCC multiplug harness from clip. 10. Disconnect multiplug from charcoal canister purge solenoid valve. 11. Disconnect alternator multiplug. 12. Release alternator harness from 4 clips. 13. Disconnect multiplugs from KS and CMP sensor. 14. Remove 2 nuts securing fuel injector harness to fuel rail. 15. Release vacuum reservoir and mounting bracket from LH fuel injector harness securing stud. 16. Remove fuel hose and mounting bracket from LH fuel injector harness securing stud.