1.2L REVOTRON ENGINE 190 III. CAMSHAFT POSITION SENSOR COMPONENT DETAILS A typical Hall Effect Sensor has three wires or terminals: one for ground, one for supply or reference voltage and one for the output signal. To produce an output signal, a Hall Effect Sensor must be supplied with a reference voltage. When a metal/wheel passes through the air gap between the magnetic field (Magnet) and silicon chip (CAM sensor), it blocks the magnetic field and causes the chip’s output voltage to suddenly drop to zero else the chip's output voltage is 4.7 Volts. COMPONENT LOCATION The cam phase sensor is mounted on cylinder head. 1. Intake Camshaft Sensor 2. Exhaust Camshaft Sensor PRELIMINARY CHECKS 1. Loose / Damaged connections between sensor and EMS ECU. 2. Check for back out of pins at both sensor connector and ECU connector. 3. Check for damage of pins at both sensor connector and ECU connector. 4. Check the continuity from sensor connector pins to the ECU pins. 5. Physical damage to Cam target wheel. 6. Improper air gap between sensor and cam target wheel. CONNECTOR DETAIL PINOUT DETAILS PIN DESCRIPTION 1 Ground (-) 2 Output 3 Supply Voltage (+)
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