Checking Speed Control Operation With No DTC's Present

Tests 1 - 2:

Tests 3 - 8:

Tests 9 - 14:

Tests 15 - 19:

Tests 20 - 24:

Tests 25 - 27:

SYMPTOM
CHECKING SPEED CONTROL OPERATION

POSSIBLE CAUSES
- Brake switch defective
- Ground circuit open
- S/C brake switch output circuit shorted to ground
- Speed control brake switch output supply circuit open
- Speed control ON/OFF/set switch defective
- Speed control power supply circuit open
- Speed control power supply circuit shorted to ground
- Speed control servo connector observable defect
- Speed control switch defective
- Clock spring defective
- Speed control servo defective
- Speed control throttle cable defective
- Speed control vacuum supply leaks or restricted
- PCM defective (speed control operation)
- Vacuum reservoir defective