Dodge Dakota (R1). Manual — part 3
system will stop pulsing the lights and return to the
“armed” state. The cause of the last 4 alarm triggers
is stored by the CTM and may be retrieved by the
DRBIII
t. The system may be disarmed by either an
unlock command from a valid RKE key fob by using
a key in either door, or by using a valid SKIM key in
the ignition. The door key cylinders are equipped
with disarm switches. There is also a VTSS lamp on
the dash that provides information to the driver
about the state of the vehicle theft system.
3.14
WINDSHIELD WIPER SYSTEM
The R1 truck equipped with a highline CTM will
utilize speed sensitive intermittent wipers. A base
CTM will provide for intermittent wipers without
the speed sensitive feature. The low and high
speeds are controlled through the wiper stalk
switch. The intermittent portion of the wiper con-
trol is handled by the CTM through the intermit-
tent wiper relay. When the module detects a de-
crease in delay time as selected by the driver, an
immediate wipe of the windshield takes place and
the new delay interval is implemented.
3.15
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.
3.16
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
or
User
Requested COLD Boot
If the DRBIII
t should display any other error
message, record the entire display and call the Star
Center for information and assistance. 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. Ox1
User-Requested COLD Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
3.16.1
DRBIII
T DOES NOT POWER UP
(BLANK SCREEN)
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. Also,
check for proper grounds at DLC cavities 4 and 5.
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 a faulty cable or
vehicle wiring.
3.16.2
DISPLAY IS NOT VISIBLE
Low temperatures will affect the visibility of the dis-
play. Adjust the contrast to compensate for this condition.
4.0
DISCLAIMERS, SAFETY,
WARNINGS
4.1
DISCLAIMERS
All information, illustrations, and specifications
contained in this manual are based on the latest
information available at the time of publication.
The right is reserved to make changes at any time
without notice.
9
GENERAL INFORMATION
4.2
SAFETY
4.2.1
TECHNICIAN SAFETY INFORMATION
DANGER!!! ENGINES PRODUCE CARBON
MONOXIDE THAT IS ODORLESS, CAUSES
SLOWER REACTION TIME, AND CAN LEAD
TO SERIOUS INJURY. WHEN THE ENGINE IS
OPERATING, KEEP SERVICE AREAS WELL
VENTILATED OR ATTACH THE VEHICLE
EXHAUST SYSTEM TO THE SHOP EXHAUST
REMOVAL SYSTEM.
Set the parking brake and block the wheels before
testing or repairing the vehicle. It is especially
important to block the wheels on front wheel drive
vehicles; the parking brake does not hold the drive
wheels.
When servicing a vehicle, always wear eye pro-
tection, and remove any metal jewelry such as
watchbands or bracelets that might make an inad-
vertent electrical contact.
When diagnosing a body system problem, it is
important to follow approved procedures where
applicable. These procedures can be found in this
General Information Section or in service manual
procedures. Following these procedures is very im-
portant to the safety of individuals performing
diagnostic tests.
4.2.2
VEHICLE PREPARATION FOR
TESTING
Make sure the vehicle being tested has a fully
charged battery. If it does not, false diagnostic codes
or error messages may occur.
4.2.3
SERVICING SUB-ASSEMBLIES
Some components of the body system are in-
tended to be serviced in assembly only. Attempting
to remove or repair certain system sub-components
may result in personal injury and/or improper sys-
tem operation. Only those components with ap-
proved repair and installation procedures in the
service manual should be serviced.
4.2.4
DRBIII
T SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII
T
MULTIMETER IS DANGEROUS. IT
CAN
EXPOSE
YOU
TO
SERIOUS
OR
POSSIBLE
FATAL
INJURY.
CAREFULLY
READ AND UNDERSTAND THE CAUTIONS
AND THE SPECIFICATION LIMITS.
•
Follow the vehicle manufacture’s service specifi-
cations at all times.
•
Do not use the DRBIII
t if it has been damaged.
•
Do not use the test leads if the insulation is
damaged or if metal is exposed.
•
To avoid electrical shock, do not touch the test
leads, tips, or other circuit being tested.
•
Choose the proper range and function for the
measurement. Do not try voltage or current mea-
surement that may exceed the rated capacity.
•
Do not exceed the limits shown in the table below.
FUNCTION
INPUT LIMIT
Volts
0 - 500 peak volts AC
0 - 500 volts DC
Ohms (resistance)*
0 - 1.12 megohms
Frequency Measured
Frequency Generated
0 - 10 kHz
Temperature
-58 — 1100F
-50 — 600C
* Ohms can not be measured if voltage is present.
Ohms can be measured only in a non-powered cir-
cuit.
•
Voltage between any terminal and ground must
not exceed 500v DC or 500v peak AC.
•
The circuit being tested must be protected by a
10A fuse or circuit breaker.
•
Use the low current shunt to measure circuits up
to 10A. Use the higher current clamp to measure
circuits exceeding 10A.
•
When testing for the presence of voltage or cur-
rent, make sure the meter is functioning cor-
rectly. Take a reading of a known voltage or
current before accepting a zero reading.
•
When measuring current, connect the meter in
series with the load.
•
Disconnect the live test lead before disconnecting
the common test lead.
•
When using the meter function, keep the
DRBIII
t away from spark plug or coil wires to
avoid measuring error from outside interference.
10
GENERAL INFORMATION
4.3
WARNINGS
4.3.1
VEHICLE DAMAGE WARNINGS
Before disconnecting any control module, make
sure the ignition is ‘‘off ’’. Failure to do so could
damage the module.
When testing voltage or continuity at any control
module, use the terminal side (not the wire end) of
the connector. Do not probe a wire through the
insulation; this will damage it and eventually cause
it to fail because of corrosion.
Be careful when performing electrical tests so as
to prevent accidental shorting of terminals. Such
mistakes can damage fuses or components. Also, a
second code could be set, making diagnosis of the
original problem more difficult.
4.3.2
ROAD TESTING A COMPLAINT
VEHICLE
Some complaints will require a test drive as part
of the repair verification procedure. The purpose of
the test drive is to try to duplicate the diagnostic
code or symptom condition.
CAUTION:
BEFORE
ROAD
TESTING
A
VEHICLE,
BE
SURE
THAT
ALL
COMPONENTS
ARE
REASSEMBLED.
DURING THE TEST DRIVE, DO NOT TRY TO
READ
THE
DRBIII
T
SCREEN
WHILE
IN
MOTION. DO NOT HANG THE DRBIII
T
FROM
THE REAR VIEW MIRROR OR OPERATE IT
YOURSELF.
HAVE
AN
ASSISTANT
AVAILABLE TO OPERATE THE DRBIII
T
.
5.0
REQUIRED TOOLS AND
EQUIPMENT
DRBIII
t (Diagnostic Read-out Box)
Jumper Wires
Ohmmeter
Voltmeter
Test Light
Diagnostic Junction Port Tester
6.0
GLOSSARY OF TERMS
ABS
antilock brake system
ACM
airbag control module
AECM
airbag electronic control module
(ACM)
ASDM
airbag system diagnostic module
(ACM)
CAB
controller antilock brake
CMTC
compass mini-trip computer
CTM
central timer module
DAB
driver airbag
DLC
data link connector
DTC
diagnostic trouble code
EBL
electric back lite (rear window de-
fogger)
ECM
engine control module
EMIC
electro/mechanical instrument clus-
ter
HVAC
heater ventilation, air conditioning
I/R
infrared sensor
MUX
Multiplexed
ODO
odometer
PAB
passenger airbag
PCI
Programmable Communication In-
terface (vehicle communication bus)
PCM
powertrain control module
PDC
power distribution center
PWM
pulse width modulated
RKE
remote keyless entry
SBT
seat belt tensioner
SKIM
sentry key immobilizer module
SKIS
sentry key immobilizer system
SQUIB
also called initiator (located in rear
of airbag module)
TCCM
transfer case control module
TCM
transmission control module
VFD
vacuum fluorescent display
VTSS
vehicle theft security system
11
GENERAL INFORMATION
NOTES
12
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