Code P063, Vehicle Speed & Set Speed Difference: Action
PCM disengages cruise control.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- PCM data value PD70 displays servo position. Range position is about 4-94 percent. If servo will no go full stroke, the vacuum supply, servo or vacuum brake release circuit is leaking.
- Checks if brake vacuum release is functioning properly.
- Checks if fault is with cruise servo or wiring. Frequency should cycle between zero and a non-zero values.