DESCRIPTION
Generator consists of a rotor, stator, rectifiers, front and rear covers and drive pulley. Generator is serviced as a complete unit only. Most models use a Denso generator. On some Ram Pickup models use a Bosch generator. Voltage regulation is controlled by Powertrain Control Module (PCM). Electronic Voltage Regulator (EVR) is not a separate component, but a circuit located within PCM. If EVR circuit is defective, PCM must be replaced.
| Application | Minimum Output (Amps) | |||
|---|---|---|---|---|
| Dakota | ||||
| 2.5L | ||||
| 117-Amp | 88 | |||
| 136-Amp | 95 | |||
| 3.9L, 4.7L, 5.2L & 5.9L | ||||
| 117-Amp | 90 | |||
| 136-Amp | 100 | |||
| Durango | ||||
| 4.7L, 5.2L & 5.9L | ||||
| 136-Amp | 100 | |||
| 160-Amp | (1) | |||
| Ram Pickup, Ram Van & Ram Wagon | ||||
| Gasoline | ||||
| 3.9L, 5.2L, 5.9L & 8.0L | ||||
| 117-Amp | 90 | |||
| 136-Amp | 100 | |||
| Diesel | ||||
| 5.9L | ||||
| 136-Amp | 120 | |||
| (1) Information not available from manufacturer. | ||||
| (1) | Information not available from manufacturer. |
GENERATOR APPLICATION
OPERATION
Amperage produced by generator is controlled by Electronic Voltage Regulator (EVR) circuitry within Powertrain Control Module (PCM). EVR circuity is connected in series with generator field driver terminal and ground. An ambient battery temperature sensor, located in battery tray, is used to sense battery temperature. Sensed battery temperature and data from monitored line voltage is used by PCM to adjust battery charging rate. This is accomplished by cycling ground path to control strength of generator rotor magnetic field. PCM then compensates and regulates generator amperage output accordingly. PCM monitors critical input to control fuel injection, ignition, emission and other engine management functions. PCM is also programmed to monitor charging system related circuits
- Battery feed to PCM.
- Generator field control.
- Battery charging voltage (High And Low).
If a problem is sensed in a monitored circuit, a DTC will be stored in PCM memory, voltage indicator light and Malfunction Indicator Light (MIL) will illuminate, provided specific criteria have been met. DTCs can be read using Chrysler's Diagnostic Readout Box (DRB-III), or a generic scan tool. A generic scan tool may also be used for system diagnostics, but may have limited diagnostic capability.