Test A: The Speed Control Is Inoperative

PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE

A1-A2:

A2-A6:

A6-A7:

Normal Operation
The powertrain control module (PCM) sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent to the PCM through circuit 848 (DG/OG) and the clockspring. When the brake pedal is applied the PCM deactivates the speed control if engaged.

Possible Causes
- Speed control switches
- Digital transmission range (TR) sensor
- Brake warning indicator system
- Output shaft sensor (OSS) signal
- PCM