Chrysler 300M 2002 Service Manual page 2803

GENERAL INFORMATION
road test under specific conditions. It must be
determined if a code is repeatable (Hard) or inter-
mittent before attempting diagnosis.
3.3.2 ONE TRIP FAILURES
A One Trip Failure, when read from the Trans-
mission Control System, is a hard OBDII (EURO
STAGE III OBD) code that has not matured for the
full 5 minutes to a hard fault. This applies to codes
that will only set after 5 minutes of substituted gear
operation.
3.3.3 INTERMITTENT CODE
A diagnostic trouble code that is not there every
time the Transmission Control System checks the
circuit or function is an a intermittent code. Some
intermittent codes, such as codes P1684(12),
P0891(14), P0888(15),
P0871(21), P0846(22),
P0120(29), P0750(41),
P0765(44), P0715(56),
P0951(70), P1799(74), P0884(76), P1687(77), and
P1652(78) are caused by wiring or connector prob-
lems. However intermittent codes 50 - 54 are usu-
ally caused by intermittent hydraulic seal leakage
in the clutch and/or accumulator circuits. Problems
that come and go like this are the most difficult to
diagnose, they must be looked for under the specific
conditions that cause them.
3.3.4 STARTS SINCE SET COUNTER
For the most recent code, the Starts Since Set
counter counts the number of times the vehicle has
started since it was last set. The counter will count
up to 255 starts. Note that this code only applies to
the last or most recent code set.
The TCM may report any of the following DTC's.
DTC P-Code Name of Code
11 P0613 Internal TCM
12 P1684 Battery was disconnected
13 P0613 Internal TCM
14 P0891 Transmission Relay always on
15 P0888 Relay output always off
16 P0605 Internal TCM
17 P0604 Internal TCM
18 P0725 Engine speed sensor circuit
19 P1694 Bus communication with engine module
20 P0890 Switched battery
21 P0871 OD pressure switch sense circuit
22 P0846 2/4 pressure switch sense circuit
24 P0841 LR pressure switch sense circuit
28 P0706 Check shifter signal
29 P0120 Throttle position sensor signal circuit
31 P0870 OD hydraulic pressure test failure
P0725(18), P1694(19),
P0841(24), P0706(28),
P0755(42), P0760(43),
P0720(57), P1794(58),
When there are no diagnostic trouble codes stored
in memory, the DRBIII
PRESENT and the reset counter will show
"STARTS SINCE CLEAR =XXX
The number of starts helps determine if the
diagnostic trouble code is hard or intermittent.
– If the count is less that 3, the code is usually a
hard code.
– If the count is greater than 3, it is considered
an intermittent code. This means that the
engine has been started most of the time
without the code recurring.
3.3.5 TROUBLE CODE ERASURE
A Diagnostic trouble code will be cleared from
Transmission Control System memory if it has not
reset for 40 warm-up cycles.
A warm-up cycle is defined as sufficient vehicle
operation such that the coolant temperature has
risen by at least 22°C (40°F) from engine starting
and reaches a minumum temperature of 71°C
(160°F).
The Malfunction Indicator Lamp (MIL) will turn off
after 3 good trips or when the DTC's are cleared
from the Transmission Control System.
3.3.6 LIST OF DIAGNOSTIC TROUBLE
CODES (DETAILED DESCRIPTIONS
FOLLOW LIST)
The Transmission Control System may report
any of the following DTC's.
4
will display NO DTC'S
Limp-in MIL
Yes Yes
No No
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No No
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No No
No No
Yes Yes