Check signal waveform of CMPS
WARNING: This page is about a different variant/trim than selected.
- Set up an oscilloscope as follows:
- Channel A (+): Signal terminal of the CMPS #2 (back probe), (-): ground
- Start the engine and check for signal waveform compared with reference waveform as below.
Specification: Refer to SIGNAL WAVEFORM & DATA
- Is the signal waveform normal?
YES
- 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
- Remove CMPS and check for air gap. Readjust as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- If CKP synchronization fails, 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.