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Vehicle Application: Customer Concern: Tests/Procedures: Potential Causes: Diagnostic Codes: 2002 Hyundai Sonata 2.4L, Vin S, Eng Cfg L4 Check engine light is on with a code P0350. 1. Check the spark plugs, verify that they are correct NGK plugs. 2. Check ignition coil and plug wires. Ignition Coil Spark Plug Wires Spark Plugs P0350 Confirmed Fix 1 – Ignition Coil, Spark Plug Wire(s) 1 – Ignition Coil
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Customer Concern: Tests/Procedures: Potential Causes: Tech Tips: Trouble code P2626. 1. At the Air/Fuel Ratio (A/F) sensor, check to see if there is battery voltage to the sensor key on engine off on the White wire. Battery voltage should also be present on the Yellow/Orange wire key on. 2. Check to see if the Engine Control Module (ECM) grounds the Yellow/Orange wire on start up. 3. Check the resistance of the A/F sensor heater circuit. Normal resistance is 2.2- 2.9 ohms. 4. Check the remaining wires for shorts to ground or each other. 5.Follow Hyundia TSB # 03-36-014-01 for further testing. Air Fuel Ratio (AFR) Sensor Harness An A/F sensor would not be an uncommon problem.
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Customer Concern: Tests/Procedures: Potential Causes: No speedometer or odometer operation. Scanned the computer, Vehicle Speed Sensor (VSS) output is good. Transmission shifts normal. 1. There is a separate VSS for the speedometer and cruise control. It is on the transmission above the right axle. Speedometer Speed Sensor Confirmed Fix Summary Confirmed Fix 2 – Speedometer Speed Sensor 2 – Speedometer Speed Sensor Gear
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Customer Concern: There is an engine vibration. Tests/Procedures: 1. To set the right side balance shaft timing, the use of the timing mark and a #2 Phillips screwdriver is necessary. There is a bolt on the side of the block that is removed, and the screwdriver is inserted into it, to ensure that the weight is in the down position when the timing mark is lined up. 2. Make sure the oil pump gear is set correctly. Rotate the oil pump pulley a few times to set the gear. When the oil pump gear is in the correct position it will snap into place. Potential Causes: Improperly Installed Balance Shaft Belt Tech Tips: Just because the dot is lined up does not mean the balance shaft driven by the oil pump is timed correctly.
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1. Raise and support vehicle. Remove wheel assembly. Disconnect brakeline bracket from strut assembly. Support control arm. Remove strut-to-steering knuckle bolts. Separate strut from steering knuckle. 2. Remove dust cap from top of strut. See Fig. 5 . Remove strut-to-body nuts. Remove strut assembly from vehicle. If no mark is present, mark bottom edge of coil spring for reassembly reference. Fig. 5: Exploded View Of Strut Assembly (Elantra & Tiburon Shown; Others Are Similar) Disassembly Mount strut assembly in vise. Compress coil spring using coil spring compressor. Remove self-locking bearing nut with Spanner Wrench while holding upper spring seat. See SPECIAL TOOLS table. Remove insulator and spring seat. Remove rubber bumper and dust cover. See Fig. 5 . Slowly release coil spring compressor tension. Remove coil spring. Inspection Check parts for deterioration or damage. Check strut assembly for leaks and proper operation. Replace strut if fluid leakage exists. Replace worn or damaged parts. Reassembly 1. To reassemble, reverse disassembly procedure. Place coil spring identification mark toward knuckle. Ensure “D” shaped upper seat hole is aligned with notch in piston rod. Align coil spring ends in spring seat grooves. 2. Pack insulator bearing with grease and install dust cap. Avoid getting grease on insulators. Compress coil spring. Install rubber bumper and dust cover, spring seat and insulator. Using spanner wrench, tighten strut piston assembly lock nut to specification. See TORQUE SPECIFICATIONS . Installation To install, reverse removal procedure. Ensure strut assembly and steering knuckle mating surfaces are clean. Tighten fasteners to specification. Check front end alignment. See SPECIFICATIONS & PROCEDURES article in WHEEL ALIGNMENT.
