Component Inspection

WARNING: This page is about a different variant/trim than selected.

Set up an oscilloscope as follows:
1. Channel A (+): Signal terminal of the CMPS #1(back probe), (-): ground
2. Channel B (+): Signal terminal of the CKPS (back probe), (-): ground
Start the engine and check for signal waveform compared with reference waveform as below.

Fig 1: Scantool Display - Signal Waveform Of CKPS (Including Missing Tooth) During Semi-Cycle Of CMPS #1
Courtesy of HYUNDAI MOTOR AMERICA
1. There are 60 signals of CKPS (Including missing tooth) during the semi-cycle of CMPS #1.
2. There are 3~5 signals of CKPS between the switching point of CMPS #1 and the missing tooth of CKPS.
Fig 2: Crankshaft Position Sensor Circuit Diagram
Courtesy of HYUNDAI MOTOR AMERICA

Fig 3: Identifying Crankshaft Position Sensor Connector Terminal
Courtesy of HYUNDAI MOTOR AMERICA
Is the signal waveform normal?
YES
- Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Remove CKP and calculate air gap between sensor and flywheel/torque converter. Readjust as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
  NOTE: Air gap [0.3~1.7 mm [0.012~0.067 in] = measure distance from housing to teeth on flywheel/torque converter (measurement "A") and from mounting surface on sensor to sensor tip (measurement "B") subtract "B" from "A"
- If air gap is OK, check CKPS for contamination, deterioration, or damage. Substitute with a known-good CKPS and check for proper operation. If the problem is corrected, replace CKPS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure