Charging - Service Information: Overview Jeep Compass I рестайлинг 2

DESCRIPTION

The charging system consists of

1. Generator
2. Decoupler Pulley (If equipped)
3. Electronic Voltage Regulator (EVR) circuitry within the Powertrain Control Module (PCM)
4. Ignition switch (refer to «IGNITION SYSTEM - SERVICE INFORMATION»(ref-612739) for information)
5. Battery (refer to «BATTERY»(ref-612722-S19512246292014043000000) for information)
6. Inlet Air Temperature
7. Voltmeter (refer to «INSTRUMENT CLUSTER - SERVICE INFORMATION»(ref-612713) for information if equipped)
8. Wiring harness and connections (refer to «SYSTEM WIRING DIAGRAMS»(ref-607585) for information)
9. Accessory drive belt (refer to «ACCESSORY DRIVE»(ref-612716-S01069332702014043000000) for more information)
10. Clutch Pulley (If equipped)
11. Electronic Voltage Regulator (EVR) circuitry internally regulated for the diesel application.

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The charging system is turned on and off with the Powertrain Control Module (PCM) (2) and ignition switch with engine running. The field circuit will not be energized until engine is running and ignition switch is on. This voltage is connected through the PCM (2) and supplied to the generator field circuit (1) at the back of the generator (6). The generator (6) is internally grounded through the generator case ground (8). The generator (6) regulates the field using Pin 1 of the field connector (High side driver).

The generator (6) is driven by the engine through a serpentine belt and pulley or decoupler pulley arrangement.

The PCM (2) receives a voltage input from the generator (6) via the B+ sense circuit (10) and also a battery sense input (3) from the Gateway (Totally Integrated Power Module, Integrated Power Module) (4), it then compares the voltages to the desired voltage programed in the Electronic Voltage Regulator (EVR) software and if there is a difference it sends a signal to the generator EVR circuit to increase or decrease output. It uses Pulse Width Modulation (PWM) to send signals to the generator circuitry to control the amount of output from the generator. The amount of DC current produced by the generator is controlled by the EVR circuitry contained within the PCM (2).

All vehicles are equipped with On-Board Diagnostics (OBD). All OBD-sensed systems, including EVR circuitry, are monitored by the PCM. Each monitored circuit is assigned a Diagnostic Trouble Code (DTC). The PCM will store a DTC in electronic memory for certain failures it detects.

The Check Gauges Lamp (if equipped) monitors: charging system voltage, engine coolant temperature and engine oil pressure. If an extreme condition is indicated, the lamp will be illuminated. This is done as reminder to check the three gauges. The lamp is located on the instrument panel. Refer to INSTRUMENT CLUSTER - SERVICE INFORMATION for additional information.

Voltage is monitored at B+ sense circuit (10) to insure the cable is connected. If the B+ circuit (generator output) (9) cable is loose anywhere in the circuit the B+ sense circuit (10) will show high voltage. This condition causes the PCM (2) to shut down the generator field circuit (1). Because of this feature, pin 2 of the field connector is internally connected to the B+ circuit (9).

The diesel generator is internally regulated. The generator and PCM communicate for diagnostics, etc. If the generator regulator becomes disconnected from the PCM it will operate, but in a default mode.

The generator is belt-driven by the engine. It is serviced only as a complete assembly. If the generator fails for any reason, the entire assembly must be replaced. The generator produces DC voltage.

OPERATION

As the energized rotor begins to rotate within the generator, the spinning magnetic field induces a current into the windings of the stator coil.

The Y type stator winding connections deliver the induced AC current to positive and negative diodes for rectification. From the diodes, rectified DC current is delivered to the vehicles electrical system through the generator, battery, and ground terminals.

Noise emitting from the generator may be caused by

1. Worn, loose or defective bearings
2. Loose or defective drive pulley
3. Incorrect, worn, damaged or misadjusted drive belt
4. Loose mounting bolts
5. Misaligned drive pulley
6. Defective stator or diode
7. Damaged internal fins

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1. Remove the air inlet tube (2).
2. Disconnect and isolate the negative battery cable.
3. If equipped, remove the belly pan (2).
4. Partially drain the radiator. Refer to «STANDARD PROCEDURE»(ref-612716-S12637819952014043000000) .
5. Remove the serpentine belt (3). Refer to «BELT, SERPENTINE, REMOVAL»(ref-612716-S26668951772014043000000) .
6. Remove the radiator support shroud.
7. Disconnect the hood release cable (2).
8. Remove bolt (1) and position aside the power steering reservoir (2).
9. Remove the radiator core support.
10. Remove bolts (2) and position aside the A/C compressor (1).
11. Disconnect the upper radiator hose (1) from the radiator.
12. Disconnect the generator field wire harness connector (1).
13. Remove nut (2) and the B+ cable from the generator.
14. Remove the bottom generator mounting bolt (2).
15. Remove upper bolts (2) and the generator (2).

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1. Rotate the two retaining clips (3) and remove the air cleaner fresh air duct (2).
2. Disconnect and isolate negative battery cable at battery.
3. Evacuate the A/C system. Refer to «PLUMBING, STANDARD PROCEDURE»(ref-612707-S15586852732014043000000) .
4. Remove the right front wheel.
5. Remove the underbody air dam.
6. Remove the accessory drive splash shield.
7. Position aside the serpentine belt. Refer to «BELT, SERPENTINE, REMOVAL»(ref-612716-S26668951772014043000000) .
8. Remove the accessory drive idler pulley.
9. Remove the A/C compressor. Refer to «COMPRESSOR, A/C, REMOVAL»(ref-612707-S03867140732014043000000) .
10. Loosen the lower mounting bolt.
11. Unplug field circuit from generator.
12. Remove the B+ terminal nut and wire.
13. Remove the upper mounting bolt.
14. Remove the generator lower mounting bolt.
15. Slide the generator (1) down and out of vehicle.