Test B: DTC P1566 - The Speed Control Command Switches Low/Out of Range

PINPOINT TEST B: DTC P1566 - THE SPEED CONTROL COMMAND SWITCHES LOW/OUT OF RANGE

B1-B2:

B2-B4:

B4-B6:

B6-B8:

B9:

Normal Operation
Under 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 through circuit 848 (DG/OG) and the clockspring.

Possible Causes
- circuit 151 (LB/BK) short to ground or short to circuit 848 (DG/OG)
- circuit 848 (DG/OG) short to ground or short to circuit 151 (LB/BK)
- clockspring
- PCM
- speed control switches