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Does anybody know how to test the three terminal 8S4Z-9P471-A tumbler rotary position sensor used on a 2010 Focus 2.0L?
My CEL came on with codes P0642 and P2004. I changed this sensor with a new one as well as the vacuum solenoid and checked the vacuum lines and verified that the vacuum actuator works with an external vacuum source and there is no mechanical binding or vacuum leaks. I am ready to replace my ECU as it seems it is not sending voltage to the vacuum solenoid to activate the tumblers from their no-vacuum position but thought I may have gotten a bad replacement 8S4Z-9P471-A rotary position switch and wanted to check it first.
The vacuum actuator is in the UP position when I start the vehicle and it never moves regardless of engine rpm. It moves easily when vacuum is applied either from the car or externally.
What can cause the solenoid to not get a 12v signal from the ECU on engine start up besides a bad ECU?
Thanks, Mike
My CEL came on with codes P0642 and P2004. I changed this sensor with a new one as well as the vacuum solenoid and checked the vacuum lines and verified that the vacuum actuator works with an external vacuum source and there is no mechanical binding or vacuum leaks. I am ready to replace my ECU as it seems it is not sending voltage to the vacuum solenoid to activate the tumblers from their no-vacuum position but thought I may have gotten a bad replacement 8S4Z-9P471-A rotary position switch and wanted to check it first.
The vacuum actuator is in the UP position when I start the vehicle and it never moves regardless of engine rpm. It moves easily when vacuum is applied either from the car or externally.
What can cause the solenoid to not get a 12v signal from the ECU on engine start up besides a bad ECU?
Thanks, Mike