Chrysler Concorde 2004 Service Manual page 1641

LH
CHARGING
DESCRIPTION - CHARGING SYSTEM
OPERATION - CHARGING SYSTEM
DIAGNOSIS AND TESTING - ON-BOARD
DIAGNOSTIC SYSTEM
SPECIFICATIONS
GENERATOR . . . . . . . . . . . . . . . . . . . . . . . . 19
SPECIFICATIONS - TORQUE
GENERATOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 19
CHARGING
DESCRIPTION - CHARGING SYSTEM
The charging system consists of:
• Generator
• Decoupler Pulley (If equipped)
• Electronic Voltage Regulator (EVR) circuitry
within the Powertrain Control Module (PCM)
• Ignition switch (refer to the Ignition System sec-
tion for information)
• Battery (refer to the Battery section for informa-
tion)
• Ambient Air Temperature (If equipped)
• Inlet Air Temperature (calculated battery tem-
perature)(If equipped)
• Voltmeter (refer to the Instrument Cluster sec-
tion for information if equipped)
• Wiring harness and connections (refer to the
Wiring section for information)
• Accessory drive belt (refer to the Cooling section
for more information)
• Battery Temperature sensor (if equipped)
OPERATION - CHARGING SYSTEM
The charging system is turned on and off with the
ignition switch. The system is on when the engine is
running and the ASD relay is energized. The ASD
relay is energized when the PCM grounds the ASD
control circuit. This voltage is connected through the
PCM or IPM (intelligent power module) (if equipped)
and supplied to one of the generator field terminals
(Gen. Source +) at the back of the generator.
The generator is driven by the engine through a
serpentine belt and pulley or decoupler pulley
arrangement.
CHARGING
TABLE OF CONTENTS
page
. . . . . . . 17
. . . . . . . . . 17
. . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . 19
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
REMOVAL
REMOVAL - 2.7L
REMOVAL - 3.5L
INSTALLATION
INSTALLATION - 2.7L
INSTALLATION - 3.5L
VOLTAGE REGULATOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 21
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
The amount of DC current produced by the gener-
ator is controlled by the EVR (field control) circuitry
contained within the PCM. This circuitry is con-
nected in series with the second rotor field terminal
and ground.
An Ambient air temperature sensor is mounted on
the bumper used to calculate the temperature near
the battery. This temperature data, along with data
from monitored line voltage (battery voltage sense
circuit), is used by the PCM to vary the battery
charging rate. This is done by cycling the feed path
to control the strength of the rotor magnetic field.
The PCM then compensates and regulates generator
current output accordingly to maintain system volt-
age at the targeted system voltage based on battery
temperature.
All vehicles are equipped with On-Board Diagnos-
tics (OBD). All OBD-sensed systems, including EVR
(field control) circuitry, are monitored by the PCM.
Each monitored circuit is assigned a Diagnostic Trou-
ble Code (DTC). The PCM will store a DTC in elec-
tronic memory for certain failures it detects and
illuminate the (MIL) lamp. Refer to On-Board Diag-
nostics in the Electronic Control Modules(Refer to 8 -
ELECTRICAL/ELECTRONIC
ULES/POWERTRAIN
DESCRIPTION) section for more DTC information.
The Charging system "Battery" light indicates
problems with the charging system (voltage too high/
low, generator failure, etc.). If an extreme condition is
indicated, the lamp will be illuminated. The signal to
activate the lamp is sent via the PCI bus circuits.
The lamp is located on the instrument panel. Refer
to the Instrument Cluster section for additional infor-
mation.
CHARGING 8F - 17
. . . . . . . . . . . . . . . . . . . . . . 20
. . . . . . . . . . . . . . . . . . . . . . 20
. . . . . . . . . . . . . . . . . . 21
. . . . . . . . . . . . . . . . . . 21
CONTROL
CONTROL MODULE
page
MOD-
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