Circuit Description
ISC motor sends a CTP switch signal to PCM. PCM applies 5 volts to CTP switch. CTP switch is closed with engine idling (low voltage signal at PCM), and open with engine above idle (high voltage signal at PCM). DTC P0510 will set when:
- Vehicle speed changes from 0-20 MPH (0-32 KM/H) 16 times during a CTP switch OFF/ON cycle.
- Vehicle speed changes from 0-20 MPH (0-32 KM/H) 16 times during a CTP switch ON/OFF cycle.
NOTE:
If DTCs P0107, P0122 and P0510 are set together, it is possible voltage reference circuit (Light Green wire) is open.