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The Y type stator winding connections deliver the induced alternating current to 3 positive and 3 neg- direct current is delivered to the vehicle electrical system through the generator battery ter- Although the generators appear the same exter- nally, different generators with different output rat- Noise emitting from the generator may be caused by: worn, loose or defective bearings; a loose or defec- fan drive belt; loose mounting bolts; a misaligned drive pulley or a defective stator or diode. BATTERY TEMPERATURE SENSOR DESCRIPTION The Battery Temperature Sensor (BTS) is attached to the battery tray located under the battery. OPERATION The BTS is used to determine the battery temper- ature and control battery charging rate. This temper- The PCM sends 5 volts to the sensor and is grounded through the sensor return line. As temper- The BTS is also used for OBD II diagnostics. Cer- tain faults and OBD II monitors are either enabled ELECTRONIC VOLTAGE REGULATOR DESCRIPTION The Electronic Voltage Regulator (EVR) is not a separate component. It is actually a voltage regulat- OPERATION The amount of direct current produced by the gen- erator is controlled by EVR circuitry contained Voltage is regulated by cycling the ground path to control the strength of the rotor magnetic field. The DIAGNOSIS AND TESTING CHARGING SYSTEM The following procedures may be used to diagnose the charging system if: • the check gauges indicator lamp (if equipped) is illuminated with the engine running • the voltmeter (if equipped) does not register properly • an undercharged or overcharged battery condi- tion occurs. Remember that an undercharged battery is often caused by: • accessories being left on with the engine not running • a faulty or improperly adjusted switch that allows a lamp to stay on. See Ignition-Off Draw Test INSPECTION To perform a complete test of the charging system, refer to the appropriate Powertrain Diagnostic Proce- (1) Inspect the battery condition. Refer to Group 8A, Battery for procedures. (2) Inspect condition of battery cable terminals, battery posts, connections at engine block, starter 8C - 2 CHARGING SYSTEM WJ DESCRIPTION AND OPERATION (Continued) |