Jeep Wrangler TJ. Manual - part 3
Symptoms of individual module failure could in-
clude any one or more of the above. The difference
would be that at least one or more modules would
respond to the DRBIII
t.
Diagnosis starts with symptom identification. If a
complete PCI Bus Communication Failure is sus-
pected, begin by identifying which modules the
vehicle is equipped with and then attempt to get a
response from the module with the DRBIII
t. If any
modules are responding, the failure is not related to
the total bus, but can be caused by one or more
modules, PCI circuit or power supply and ground
circuits. The DRBIII
t may display 9BUS +/- SIG-
NAL OPEN
9 or 9NO RESPONSE9 to indicate a
communication problem. These same messages will
be displayed if the vehicle is not equipped with that
particular module. The CCD error message is a
default message used by the DRBIII
t and in no way
indicates whether or not the PCI Bus is operational.
The message is only an indication that a module is
either not responding or the vehicle is not equipped.
NOTE: Communication
over
the
BUS
is
essential to the proper operation of the
vehicles on-board diagnostic systems and
the DRBIII
T
. Problems with the operation of
the BUS or DRBIII
T
must be corrected before
proceeding with diagnostic testing. If there is
a problem, refer to the communications
category of this manual.
NOTE: For 2005 model year, this vehicle will
integrate the Transmission Control Module
and Powertrain Control Module into a single
control module. This new module is the Next
Generation Controller for DaimlerChrysler
and will be referred to as the Powertrain
Control Module (PCM). The Transmission
Control Module is part of the Powertrain
Control Module.
Diagnostic procedures and DTC numbers are
some of the changes you will see which
reflect the new combined module technology.
The
PCM
will
have
four
color
coded
connectors
C1
through
C4,
(C1-BLK,
C2-ORANGE, C3-WHITE, C4-GREEN), each
PCM connector will have 38 pins each. Two
new tools are used for probing and repairing
the New PCM connectors. A New tool to
release the pins from the PCM connectors
Miller #3638 is introduced, you must use the
Miller tool #3638 to release the connector
pins or harness and connector damage will
occur.
Also
a
New
tool
for
probing
connectors Miller #8815 is introduced, you
must use the Miller tool #8815 to probe the
PCM pins or harness and connector damage
will occur. There is also a new Verification
test and module replacement procedure for
the PCM.
3.7
USING THE DRBIII
T
Refer to the DRBIII
t user’s guide for instructions
and assistance with reading trouble codes, erasing
trouble codes, and other DRBIII
t functions.
3.7.1
DRBIII
T ERROR MESSAGES AND
BLANK SCREEN
Under normal operation, the DRBIII
t will dis-
play one of only two error messages:
•
User-Requested WARM Boot
•
User-Requested COLD Boot
This is a sample of such an error message display:
ver: 2.14
date: 26 Jul93
file: key_itf.cc
date: Jul 26 1993
line: 548
err: 0x1
User-Requested COLD Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
If the DRBIII
t should display any other error
message, record the entire display and call the
STAR Center for information and assistance.
3.7.2
DRBIII
T DOES NOT POWER UP
If the LED’s do not light or no sound is emitted at
start up, check for loose cable connections or a bad
cable. Check the vehicle battery voltage (data link
connector cavity 16). A minimum of 11 volts is
required to adequately power the DRBIII
t.
If all connections are proper between the
DRBIII
t and the vehicle or other devices, and the
vehicle battery is fully charged, an inoperative
DRBIII
t may be the result of faulty cable or vehicle
wiring.
9
GENERAL INFORMATION