Component Inspection

Component Inspection

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








3. Is the signal waveform normal ?
YES
1) Check for poor connection between ECM 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
1) 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