Note. For more information regarding the camshaft position sensor electrical circuit, refer to chapter 5 in illustration 9.21b.
General description
62. The camshaft position sensor is located on the timing chain cover behind the coolant pump next to the camshaft sprocket. When the camshaft is turned, the magnet mounted on it changes the electromagnetic field. As a result, the electronic circuit closes to "mass" the signal circuit going to the PCM unit, and the voltage in it drops sharply. This creates the condition "interrupts" signal. If there is no signal from the camshaft position sensor, the PCM generates code 41.
Examination
63. To check the camshaft position sensor circuit, disconnect the sensor electrical connector (see illustration). Turn on the ignition, but do not start the engine.
4.63. Camshaft position sensor (shown by arrow) located on the timing chain cover (bottom view)
64. Measure voltage between pins "A" And "IN" at the sensor connector. It should lie in the range of 5-7 V.
65. Measure voltage between pins "IN" And "WITH" at the sensor connector. It should lie in the range of 8-11 V.
66. If the voltage between the contacts "A" And "IN" below the specified limits, check the sensor circuit for an open or short circuit. In addition, check the ignition unit (see chapter 5, section 9).
67. If the voltage between the contacts "IN" And "WITH" too small, check the condition of the wires coming from these contacts to the corresponding points in the electrical circuit.
68. If in both cases the measured voltage values fall within the specified limits, give the camshaft sensor together with the PCM unit to be checked by a repair shop.
Replacement
69. Disconnect the wire from the negative battery terminal.
70. Remove the V-ribbed drive belt (see chapter 1, section 21).
71. Disconnect the electrical connector from the camshaft position sensor.
72. Having unscrewed the bolt, remove the sensor from the timing chain housing.
73. The sensor is installed in the reverse order. After installation, make sure that the sensor mounting bolt is tightened to the required torque indicated in the technical data at the beginning of the chapter.