Pinpoint Test M: The Speed Control Switch Is Inoperative - Off

Test Step 

M1 CHECK THE SPEED CONTROL ACTUATOR SWITCH SC_OFF PID 

• Key in ON position.
• Monitor the speed control actuator SC_OFF PID. Press and release the speed control actuator switch OFF button while slightly turning the steering wheel from side to side.
• Does the diagnostic tool indicate ACTIVE with the speed control actuator switch pressed and not ACTIVE with the speed control actuator switch released? 

Result / Action to Take 

Yes 

System is OK.

No 

GO to M2.

Test Step 

M2 CHECK THE SPEED CONTROL ACTUATOR SWITCH OFF 

• Key in OFF position.
• Disconnect: Speed Control Actuator C122.
• Measure the resistance between speed control actuator C122 pin 5, circuit 151 (LB/BK), harness side, and speed control actuator C122 pin 6, circuit 848 (DG/OG), harness side, while pressing the speed control actuator switch OFF and slightly turning the steering wheel from side to side.
  Fig 1: Checking Speed Control Actuator Switch Off

  Courtesy of FORD MOTOR CO.
• Is the resistance less than 5 ohms with OFF pressed and greater than 10,000 ohms with OFF released? 

Result / Action to Take 

Yes 

INSTALL a new speed control actuator. REFER to SPEED CONTROL SERVO . TEST the system for normal operation.

No 

INSTALL a new speed control actuator switch. REFER to SPEED CONTROL SWITCH . TEST the system for normal operation.