Testing - Ford Ranger Maintaince And Repair Manual

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Oil pump drive mounted CMP sensor used on 3.0L, 4.0L and 5.0L engines and 1994 California

On the 4.0L SOHC engine (VIN E), the Camshaft Position (CMP) sensor is a variable reluctance sensor,

which is triggered by the high−point mark on the left−hand camshaft. It is mounted to the valve cover.

The 4.0L and 5.0L engines use a separate CMP sensor mounted to the oil pump drive. The drive assembly is

located toward the rear of the engine on the 4.0L, and towards the front on the 5.0L engine.

TESTING

Three Wire Sensors

With the ignition OFF, disconnect the CMP sensor. With the ignition ONand the engine OFF,

measure the voltage between sensor harness connector VPWRand PWR GNDterminals (refer to the

accompanying illustration). If the reading is greater than 10.5 volts, the power circuit to the sensor is

With the ignition OFF, install break−out box between the CMP sensor and the PCM. Using a Digital

Volt−Ohmmeter (DVOM) set to the voltage function (scale set to monitor less than 5 volts), measure

voltage between break−out box terminals 24and 40with the engine running at varying RPM. If the

voltage reading varies more than 0.1 volt, the sensor is okay.

HOW TO USE THIS BOOK

2.3L engines

Mountaineer Explorer