Set up an oscilloscope as follows :
Channel A (+): Signal terminal of the CMPS #2(back probe), (-): ground.
Channel B (+): Signal terminal of the CKPS(back probe), (-): ground.
Start the engine and check for signal waveform compared with reference waveform as below.
① There are 60 signals of CKPS(Including missing tooth) during the semi-cycle of CMPS #2.
② There are 15 signals of CKPS between the switching point of CMPS #2 and the missing tooth of CKPS.
Is the signal waveform normal ?
 | ▶ 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. |
 | ▶ - Remove CMPS and check for air gap. Readjust as necessary and go to "Verification of Vehicle Repair" procedure. - If fail to synchronize with CKP sensor, check that the crankshaft and camshaft are correctly aligned the matching marks of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle Repair" procedure. - Check CMPS for contamination, deterioration, or damage. Substitute with a known-good CMPS and check for proper operation. If the problem is corrected, replace CMPS and then go to "Verification of Vehicle Repair" procedure. |
