Dodge 2004 Neon SRT4, Diagnostic Manual

Page: 730 / 922

Set condition: This code is set if the LR pressure
switch is either open or closed at the wrong time in
a given gear.
Theory of operation: The Transmission system
uses three pressure switches to monitor the fluid
pressure in the LR, 2/4, and OD elements. The
pressure switches are continuously monitored for
the correct states in each gear.
Transmission Effects: If a set condition is iden-
tified, 1st gear and torque converter lock-up
(EMCC) will be inhibited. The vehicle will launch
in 2nd gear and shift normally through the gears
without allowing EMCC. If during the same key
start, the set condition is no longer valid, the
transmission will return to normal operation (1st
and EMCC available). Limp-in will not occur un-
less code P0841(24) is accompanied by a code
P0706(28) and the MIL will illuminate after 5
minutes of substituted operation.
Possible causes:
> If code P0944(35) is present, ignore code
P0841(24) and perform code P0944(35) diag-
nostic procedures
> LR pressure switch sense circuit, open or
shorted to ground between PCM and solenoid
pack
> LR pressure switch sense circuit shorted to
battery
> Solenoid/Pressure Switch assembly
> Valve body - solenoid switch valve stuck in
LU position. May be accompanied by a code
P1775(37)
> Loose valve body bolts
> Plugged filter - internal transmission or
torque converter failure
> PCM
Name of code: P0706(28) - Check Shifter Signal
When monitored: Continuously with the key on.
Set condition: 3 occurrences in one key start of an
invalid PRNDL code which lasts for more than 0.1
second.
Theory of operation: The C1 through C4 (T1, T3,
T41, and T42) sense circuits communicate the shift
lever position to the PCM. Each circuit is termi-
nated at the transmission with a switch. Each
switch can be either open or closed, depending on
the shift lever position. The PCM can decode this
information and determine the shift lever position.
Each shift lever position has a certain combination
of switches which will be open and closed, this is
called a PRNDL code. There are 4 switches, there-
fore: there are many possible combinations of open
and closed switches (codes). However, there are
only 9 valid codes (8 for AutoStick), one for each
gear position and three recognized between gear
codes. The remainder of the codes should never
occur, these are called invalid codes. The following
chart shows the normal switch states for each shift
lever position.
The following are DRBIII
t
reported Shift Le-
ver Error codes (chart)
Transmission Effects and possible causes:
Scenario 1) - All PRNDL lights stay illuminated
indefinitely in Park following a Key start.
> Wrong Part Number PCM for application
> TRS connector not plugged in
> C1 through C4 (T1, T3, T41, or T42) circuits are
open, shorted to ground, or shorted to 12 volts.
> PCI bus failure (Open or shorted resulting in no
communication to BCM or Cluster)
> TRS
> PCM
> BCM
Scenario 2) - “P” is indicated following a key start
but all PRNDL lights illuminate in “N” following a
shift from “R” to “N”. If PRNDL lights illuminate in
“N” and shifter is moved directly into “3” or “L”
9
GENERAL INFORMATION