Pinpoint Test M: The Speed Control Switch Is Inoperative - Off
WARNING: This page is about a different car, the 2004 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
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.
- 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.