Conditions for Setting the DTC

B3794 08 

The BCM detects an invalid voltage signal on the cruise control switch signal circuit for 1 s.

B3794 61 

Stuck switch for either Resume/Accel or Set/Coast button for 60 s.

P0564, P0565, P0567, P0568, P056C

• The BCM detects an invalid voltage signal on the cruise control switch signal circuit for greater than 2 s and sends a serial data message to the ECM. The ECM sets these DTCs when the message is received.
• The ECM runs this diagnostic continuously.

P0580, P0581

• The ECM detects an invalid voltage signal on the cruise control switch signal circuit.
• The above condition is present for greater than 2 s.
• The ECM runs this diagnostic continuously.

P155A 

The ECM is unable to determine the state of the cruise control switch.

P162C 

The ECM is unable to determine the state of the vehicle speed limiting switch.