looking for specs for sensors
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Junior User
Joined: Jul 2000
Posts: 84
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looking for specs for sensors
I have a 94 f150, 4x4, 5L, 4r70w auto. I am in the process of fixing my torque converter clutch problem where the clutch keeps disengaging at strange times. I bought the Ford factory manual and it identifies five possible sensors which could cause my problem. They are Brake On/Off, Mass Air Flow (12B579), Throttle Position (9B989), Output Shaft Speed Sensor (7H103) and Programmable Speedometer/Odometer Module. My manual has specs on the Brake and Output shaft sensors, but for the others I am refered to the emission control and diagnostic manual. This is frustrating since I paid about $100 for this book and it is incomplete!
Anyway, does anyone know a way to test these sensors with a multimeter to verify they are in spec?
Anyway, does anyone know a way to test these sensors with a multimeter to verify they are in spec?
Senior User
Joined: Feb 2001
Posts: 230
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looking for specs for sensors
Your service manual is not incomplete...you just didn't buy the right manual!
As Paul pointed out, the PCED will have pinpoint tests that walk you through the test procedure for each sensor.
Looks like it's time to spend another $100. Aren't Fords grand?
As Paul pointed out, the PCED will have pinpoint tests that walk you through the test procedure for each sensor.
Looks like it's time to spend another $100. Aren't Fords grand?
Senior User
Joined: Feb 2001
Posts: 230
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looking for specs for sensors
I'm not Paul, but test equipment requirements vary depending on which sensor you're trying to test. A MAP sensor requires a DVOM capable of measuring Hz. A VSS sensor requires only a conventional DVOM. The Ford PCED/Emissions Control-Diagnostics manual tells you exactly what test equipment is required for a given sensor. PCEDs are available from Helm Inc. at http://www.helminc.com
