Chrysler Pacifica. Manual — part 320
10.0
SCHEMATIC DIAGRAMS
10.1
TEVES MARK 25e ANTI-LOCK BRAKE MODULE
S
C
H
E
M
A
T
I
C
D
I
A
G
R
A
M
S
55
SCHEMATIC DIAGRAMS
NOTE
The CS is equipped with the Powertrain
Control Module and Transmission Control
Module combined in a single control module.
This
module
is
the
Next
Generation
Controller (NGC) for DaimlerChrysler and will
be referred to as the Powertrain Control
Module (PCM).
The PCM has four color coded connectors C1
through C4, (C1 - BLK, C2 - ORANGE, C3 -
WHITE, C4 - GREEN), with each connector
containing 38 pins.
Two tools are required to diagnose and repair
the PCM terminals and harness connectors:
1. Miller #3638 Terminal Removal Pick must
be
used
to
release
the
connector
terminals
or
harness
and
connector
damage will occur.
2. Miller #8815 Pinout Box must be used to
probe the PCM terminals or terminal
damage will occur.
1.0
INTRODUCTION
The procedures contained in this manual include
specifications, instructions, and graphics needed to
diagnose the PCM Powertrain System. The diag-
nostics in this manual are based on the failure
condition or symptom being present at time of
diagnosis.
Please follow the recommendations below when
choosing your diagnostic path.
1. First make sure the DRBIII
t is communicating
with the appropriate modules; ie., if the DRBIII
t
displays a No Response condition, you must
diagnose this first before proceeding.
2. Read DTC’s (diagnostic trouble codes) with the
DRBIII
t.
3. If no DTC’s are present, identify the customer
complaint.
4. Once the DTC or customer complaint is identi-
fied, locate the matching test in the Table of
Contents and begin to diagnose the symptom.
All component location views are in Section 8.0.
All connector pinouts are in Section 9.0. All system
schematics are in Section 10.0.
An * placed before the symptom description indi-
cates a customer complaint.
When repairs are required, refer to the appropri-
ate service information for the proper removal and
repair procedure.
Diagnostic procedures change every year. New
diagnostic systems may be added; carryover sys-
tems may be enhanced. READ THIS DIAGNOSTIC
INFORMATION BEFORE TRYING TO DIAG-
NOSE A VEHICLE CODE. It is recommended that
you review the entire diagnostic information to
become familiar with all new and changed diagnos-
tic procedures.
If you have any comments or recommendations
after reviewing the diagnostic information, please
fill out the form at the back of the book and mail it
back to us.
1.1
SYSTEM COVERAGE
This diagnostic procedures manual covers the
2005 CS vehicle equipped with the 3.5L and 3.8L
engine.
1.2
SIX-STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the powertrain control module
(PCM) is done in six basic steps:
•
verification of complaint
•
verification of any related symptoms
•
symptom analysis
•
problem isolation
•
repair of isolated problem
•
verification of proper operation
2.0
IDENTIFICATION OF
SYSTEM
The Powertrain Control Module (PCM) monitors
and controls:
•
Fuel System
•
Idle Air Control System
•
Ignition System
•
Charging System
•
Speed Control System
•
Cooling system
1
GENERAL INFORMATION
3.0
SYSTEM DESCRIPTION AND
FUNCTIONAL OPERATION
3.1
GENERAL DESCRIPTION
These Sequential Fuel Injection (SFI) engine sys-
tems have the latest in technical advances. The
OBDII/EOBD diagnostics incorporated with the
Powertrain Control Module (PCM) are intended to
assist the field technician in repairing vehicle prob-
lems by the quickest means.
3.2
FUNCTIONAL OPERATION
3.2.1
FUEL CONTROL
The PCM controls the air/fuel ratio of the engine
by varying fuel injector on time. Mass air flow is
calculated using the speed density method using
enigne speed, manifold absolute pressure, and air
temperature change.
Different fuel calculation strategies are used de-
pending on the operational state of the engine.
During crank mode, a longer pulse width fuel pulse
is delivered followed by fuel pulses determined by a
crank time strategy. Cold engine operation is deter-
mined via an open loop strategy until the O2
sensors have reached operating temperature. At
this point, the strategy enters a closed loop mode
where fuel requirements are based upon the state of
the O2 sensors, engine speed, MAP, throttle posi-
tion, air temperature, battery voltage, and coolant
temperature.
3.2.2
ON-BOARD DIAGNOSTICS
The PCM has been programmed to monitor many
different circuits of the fuel injection system. This
monitoring is called on-board diagnosis.
Certain criteria, or arming conditions, must be
met for a trouble code to be entered into the PCM
memory. The criteria may be a range of: engine rpm,
engine temperature, and/or input voltage to the
PCM. If a problem is sensed with a monitored
circuit, and all of the criteria or arming conditions
are met, then a trouble code will be stored in the
PCM.
It is possible that a trouble code for a monitored
circuit may not be entered into the PCM memory
even though a malfunction has occurred. This may
happen because one of the trouble code criteria have
not been met.
The PCM compares input signal voltages from
each input device with specifications (the estab-
lished high and low limits of the range) that are
programmed into it for that device. If the input
voltage is not within specifications and other trou-
ble code criteria are met, a trouble code will be
stored in the PCM memory.
The On Board Diagnostics have evolved to the
second Generation of Diagnostics referred to as
OBDII/EOBD. These OBDII/EOBD Diagnostics
control the functions necessary to meet the require-
ments of California OBDII, Federal OBD regulation
and European regulation. These requirements spec-
ify the inclusion of a Malfunction Indicator Light
(MIL) located on the instrument panel. The purpose
of the MIL is to inform the vehicle operator in the
event of a malfunction of any emission system or
component.
MIL Lamp Strategy
I/M Readiness OK to test = Key On Engine OFF
– MIL Lamp will remain on until the vehicle is
started or Ignition is turned off.
I/M not ready for testing = Key On Engine OFF
– MIL Lamp on solid for (15) seconds then MIL
Lamp will flash on/off for (5) seconds then it will
remain on until the vehicle is started or the Ignition
is turned off.
2
GENERAL INFORMATION
OBD II/EOBD MONITOR INFORMATION
Comprehensive
Major Monitors
Major Monitors
Components
Non Fuel Control
Fuel Control
Monitor
& Non Misfire
& Misfire
Run constantly
Run Once Per Trip
Run Constantly
Includes All Engine Hardware
Monitors Entire Emission
Monitors Entire System
- Sensors, Switches,
System
Solenoids, etc.
One Trip Faults - Turns On
Two Trip Faults - Turns On
Two Trip Faults - Turns On
The MIL and Sets DTC After
The MIL and Sets DTC After
The MIL and Sets DTC After
One Failure
Two Consecutive Failures
Two Consecutive Failures
Priority 3
Priority 1 or 3
Priority 2 or 4
All Checked For Continuity
Done Stop Testing = Yes
Fuel Control Monitor
Open
Monitors Fuel Control
Short To Ground
Oxygen Sensor Heater
System For:
Short To Voltage
Oxygen Sensor Response
Fuel System Lean
Fuel System Rich
Inputs Checked For
Requires 3 Consecutive
Rationality
Catalytic Converter
Fuel System Good Trips
To
Efficiency Except EWMA
Extinguish The MIL
Outputs Checked For
- up to 6 tests per trip
Functionality
and a one trip fault
EGR System
Misfire Monitor
Evaporative Emission
Monitors For Engine Misfire
System
at:
1000 RPM Counter
(Type B)
**200 RPM Counter
(Type A)
Requires 3 Consecutive
Requires 3 Consecutive
Requires 3 Consecutive
Global/Alternate Good Trips
Global Good Trips
Misfire Good Trips
to Extinguish the MIL*
to Extinguish the MIL*
To Extinguish the MIL
*40 Warm Up Cycles are required to erase
**Type A misfire is a two
DTC’s
after
the MIL has been extinguished.
trip failure. The MIL will
illuminate and blink at
the first failure.
3
GENERAL INFORMATION
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