Test B

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

Test B1:

Test B2-B3:

Test B4-B5:

Test B6-B7:

Test 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) open, shorted to power or shorted to ground
- circuit 848 (DG/OG) open, shorted to power or shorted to ground
- clockspring
- PCM
- speed control switches