Component Inspection: Notes

■ E-CVVT Inspection 

1. Connect GDS and select "DTC Analysis" mode
2. Warm up the engine.
3. Monitor the parameters related to DTC on the "Current Data" menu of the GDS below.
   Fig 1: Screen Display - Service Data During Intake E-CVVT In Operation

   Courtesy of HYUNDAI MOTOR AMERICA
   • Current position of inlet camshaft is varied according to actual engine speed
4. Is parameter displayed within specifications?

   YES 

   • Go to next procedure.

   NO 

   • Check the mechanical connection between E-CVVT assembly and cam shaft.
   • Visually check oil leakage around E-CVVT assembly.
   • Substitute with a known - good E-CVVT and check for proper operation. If the problem is corrected, replace E-CVVT and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
   NOTE: When the electric E-CVVT assembly is replaced or remounted, make sure to use the additional feature menu on the GDS diagnosis equipment and reset the learned value.

■ Timing Inspection 

1. With IG "OFF", set up an oscilloscope as follows:

   Channel A (+): Signal terminal of the CMPS #1 (back probe), (-): ground

   Channel B (+): Signal terminal of the CKPS (back probe), (-): ground

2. Start the engine and check for signal waveform whether synchronize with camshaft sensor or not and tooth is missing refer to sample waveforms below.
3. Is the signal waveform normal?

   YES 

   • Fault is intermittent. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Check that the crankshaft and camshaft are correctly aligned the matching marks of the pulleys for the followings.
   • Alignment of the timing belt
   • Alignment of the camshaft timing chain

     Readjust or repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.