MECHANICAL & ELECTRICAL CHARACTERISTICS Main resonance frequency of Sensor head: > 30 kHz Up to 30 kHz the sensitivity must not exceed 200 mV/g. Capacitance (of sensor head): C = 1150 ± 200 pF Capacitance measured at frequency 1 kHz, parallel; sensor mounted with torque 20±5Nm. Due to parallel circuit of both sensor head and wire capacitance only the total capacitance can be measured. Temperature dependence of capacitance, related to 200C room temperature. For temperature -400C... + 200Cd≤ 1.9 pF/K For temperatures +200C ... + 1500C ≤ 3,3 pF/K Shunt resistor: 4.9MΩ ± 20% After ageing: 4-10MΩ (resistance between 2 signal leads) Resistor Pin for supporting sleeve > 1MΩ Temperature dependence of sensitivity at 9 kHz ≤ - 0.04 mV/(g*K) V. CRANKSHAFT POSITION SENSOR COMPONENT DETAILS: The circuit decodes the signal given by an inductive based sensor (Variable Reluctance). Intended target is a wheel uniformly cut with 60 teeth and 2 teeth removed. The sensor output signal approximates a sine wave whose frequency is proportional to engine speed and amplitude is approximately proportional to engine speed. Active edge is generated from zero crossing point positive to negative transition. COMPONENT LOCATION 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. Petrol Engine Ph-2 (CAFÉ) 183
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