Chrysler Concorde 1993 Service Manual page 681

21 - 82 TRANSAXLE
• Park
• Neutral
• Reverse
• Second Gear
No upshifts or downshifts are allowed while in the
Limp-in mode. The position of the manual valve
alone allows the three ranges that are available.
Although engine performance will be reduced while
in this mode, the vehicle can be driven in for service.
DRB II SCAN TOOL
The DRB II scan tool is a diagnostic read-out box
designed by Chrysler. It is used to gain access to the
on-board diagnostics that are found on all Chrysler-
built cars and trucks.
The DRB II scan tool has a few diagnostic capabil-
ities by itself. To perform most diagnostic tests, a
program cartridge must be inserted. It contains the
diagnostic test programs.
There are diagnostic read-out boxes available from
other manufactures that can be used on Chrysler ve-
hicles. However, the diagnostic test procedures in
this manual have been designed for use with the
Chrysler's DRB II scan tool.
The DRB II scan tool operates by communicating
with the module of the vehicle system being tested.
To communicate with the transmission control mod-
ule, the DRB II scan tool must be connected to the
blue CCD bus connector. The connector is located un-
der the instrument panel. Refer to the ''Using the
DRB II scan tool'' manual or the Diagnostic Proce-
dures Manual for information on how to use the DRB
II scan tool.
DIAGNOSTIC TROUBLE CODE CHARTS
Below is a brief description of what each section of
the diagnostic trouble code charts are addressing.
• DIAGNOSTIC TROUBLE CODE-Tells the code
number and name (as shown on the DRB II scan
tool).
• BACKGROUND-A brief description of the circuit
that the transmission control module is monitoring.
• WHEN CHECKED-The point of time or condition
when the transmission control module makes it's sys-
tem check.
• ARMING CONDITIONS-The parameters that
must be met before a code can be set.
• FAULT CONDITION-What the transmission con-
trol module saw that is determined to be a problem.
(ie. voltage to high or low, switch/solenoid problems)
• FAULT SET TIME-Refers to the amount of time
(in seconds) a failure must occur before a diagnostic
trouble code is set in memory.
• EFFECT-Refers to how the fault effects transaxle
operations.
• POSSIBLE CAUSE-Refers to the systems or cir-
cuits which could cause the fault to be recorded.