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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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Fig. Fig. 1: Glow plug system schematic Fig. Fig. 2: Dropping resistor and glow plug relay locations Fig. Fig. 3: Thermo switch location Fig. Fig. 4: Dropping resistor check 1. To test the dropping resistor, check for continuity across the terminals as described in the illustration. If no continuity exists, replace the unit. 2. To test the thermo switch, first remove the switch. Submerge the end of the switch in water and raise the temperature gradually. The switch should be off at 126-140°F (53-60°C) or lower. The switch should be on at 134-145°F (57-63°C) or higher. If not, replace the switch. REMOVAL & INSTALLATION See Figure 5 Fig. Fig. 5: Location of the glow plugs The glow plugs are located under the injection nozzles, and are threaded into the cylinder head. 1. Disconnect the negative (-) battery cable. 2. Disconnect the glow plug and unscrew it from the engine. To install: 3. Lubricate with anti-seize compound before installing the plug. 4. Install and tighten the plug to 65 ft. lbs. (88 Nm). 5. Reconnect the plug wiring. 6. Connect the battery cable and check operation.

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A/C AMPLIFIER (8) C 28 A/C RELAY BOX (8) D-E 31 A/T IND SW (9) E 35 ABS ACTUATOR (10) D-E 36 ABS COMPUTER (10) D-E 39 ALTERNATOR (1) B 3 AUTO ANTENNA MOTOR (12) D 46 BACK-UP LT SW (12) C 47 BATTERY (1) A 2 BLOWER MOTOR (8) E 30 BLOWER RESISTOR (8) E 29 CHECK CONN (7M-GE) (2) E 4 CHECK CONN (7M-GTE) (3) D-E 11 CHOKE COIL (12) C 46 CLUTCH SW (9) C 35 COLD START INJECTOR (1) B 3 CONDENSER FAN RELAYS (8) C-D 29-30 COOLANT VSV (8) B 29 CRUISE CONTROL ACTUATOR (9) C 35 CRUISE CONTROL COMPUTER (9) A 34 CRUISE CONTROL MAIN RELAY (9) B 35 DEFOG SW (11) D 40 DIODE (7M-GTE) (11) C 41 DIR SW (11) A 40 DOOR KEY CYLINDER LT (7) C 27 DOOR LOCK CTRL RELAY (10) A 37 ECT ECU (9) D-E 32

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Fig. 127: IGNITION COILS – LEFT CYLINDER HEAD 1 – FUEL RAIL 2 – IGNITION COILS 3 – WIRING HARNESS 4 – LOWER INTAKE MANIFOLD WARNING: DO NOT START OR RUN ENGINE WITH CYLINDER HEAD COVER REMOVED FROM THE ENGINE. DAMAGE OR PERSONAL INJURY MAY OCCUR. 1. Disconnect and isolate the negative battery cable. 2. Remove the upper intake manifold from the engine (Refer to MANIFOLD – INTAKE). 3. Cover lower intake manifold (4) with a suitable cover during service. 4. Disconnect and remove the three ignition coils (2). See Fig. 127. 5. Remove the ground strap/resistor retaining bolt from the cylinder head cover. 6. Lift up on the wire harness track (3) retaining tabs. See Fig. 127.