Component Inspection
- Check PCM
The purpose of checking ECM is to determine whether there is any malfunction of PCM
- Ignition "OFF"
- Connect scan tool and Engine "ON "
- Select simulation function on scan tool.
Specification: If the vehicle speed changes as simulation change, it is OK
- Is VSS sensor signal value changed according to simulation voltage?
YES
- Check VSS for contamination, deterioration, or damage. Clean VSS with suitable cleaner as necessary and let air dry before reinstalling. If problem still exists, Substitute with a known-good VSS and check for proper operation.
If the problem is corrected, replace VSS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Check VSS for contamination, deterioration, or damage. Clean VSS with suitable cleaner as necessary and let air dry before reinstalling. If problem still exists, Substitute with a known-good VSS and check for proper operation.