Daytona Shelby V6-181 3.0L SOHC (1991)
Verification test
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A verification of system operation must always be performed to ensure that the system is operating normally after the cause of a fault has been
found and repaired.
All of the information in this section has been specifically included to assist you to find the cause of a vehicle fault.
Visual Inspection
A visual inspection consists of physically looking for the possible cause of a malfunction. A careful and thorough visual inspection of components may
quickly identify the cause of a malfunction and eliminate the need for diagnostic testing. If a malfunction is not resolved by the visual inspection, proceed
with diagnostic testing according to the instructions in this section.
On-Board Diagnostic System
Diagnosis of vehicle systems other than the body system uses the DRBII to read hard fault messages. The reason for the fault is then diagnosed to find
the source of the problem. When a body system does not operate properly, a warning message will appear on the EVIC panel, or the customer will
describe a complaint.
The body systems are monitored by individual control modules, which then send information about their operation to the body controller.
Diagnosis of body system problems is accomplished by:
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Performing the tests that apply to the warning message or the customer complaint.
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Using the DRBII to read information from the body controller or any other module on the CCD bus system about the functioning of each body
system.
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Reading fault codes when instructed to do so.
DRBII Diagnostic Read-Out Box
The DRBII is a diagnostic read-out box designed by Chrysler to gain access to the on-board diagnostics that are found on Chrysler-built cars and trucks.
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The DRBII reads the system performance information that is stored in the vehicle system controllers.
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The DRBII displays the fault messages that have been stored in the various system controller memories.
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The DRBII allows the Technician to run tests of computer-controlled vehicle systems.
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The DRBII, along with the test instructions in this section, leads the Technician through the diagnostic procedures.
There are diagnostic read-out boxes available from other manufacturers that can be used on Chrysler vehicles. However, the diagnostic test procedures in
this manual have been designed specifically for use with Chrysler's DRBII diagnostic read-out box. It is assumed that the DRBII will be used to perform
the procedures in this section.
The DRBII operates by communicating with the controller for the vehicle system being tested. To communicate with any body system controller, the
DRBII must be connected to the CCD bus diagnostic connector.
To perform the diagnostic tests in this section, a program cartridge must be inserted into the DRBII. This cartridge serves a similar purpose for the
DRBII as a diskette does for a personal computer. It contains the diagnostic test program. It must be inserted into the DRBII in order to perform the tests
in this section.
DRBII TEST FUNCTIONS
This section contains diagnostic tests for the following body Systems:
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Electronic Vehicle Information Center (EVIC)
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Electronic Instrument Cluster (EIC)
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Mechanical Instrument Cluster (MIC)
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Vehicle Theft Alarm
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Traveler
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Compass/Temperature Module
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Headlamp doors
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Automatic door locks
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Intermittent wipers
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Illuminated entry
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Courtesy lamps.
In order to perform the tests, you must operate the DRBII to reach the module menu level within the diagnostic testing program. At the module
menu, you can read DRBII faults and perform diagnostic test functions.
The module menu provides a choice of several different categories of test functions as described below.
