Dodge Neon / Neon SRT-4. Manual — part 625

MPH), the transmission will immediately
substitute second gear for the current gear. If
the gear ratio problem goes away, normal
operation will resume. If three gear ratio
problems are identified in a given key start,
the transmission will go into Limp-in mode.

Possible causes:
Code P0736(50) - Excludes geartrain failures
which should be obvious upon disassembly

> If code P0944(35) is also set, follow diagnostic

procedure for code P0944(35) first

> Valve body - #1 ball check or LR switch valve

sticking - may also set code P0731(51)

> Speed sensor or associated wiring - may also set

codes P0731(51), P0715(56), or P0720(57)

> Failed or slipping LR clutch - may also set code

P0731(51)

– LR seal leakage (Intermittent no drive or

reverse)

– Sticky LR accumulator seals (Intermittent no

drive or reverse)

> Failed reverse clutch (hard code)

– OD/Rev lip seal leakage

– Worn reaction shaft support seal rings

– Snap ring out of position

Code P0731(51) - Excludes geartrain failures
which should be obvious upon disassembly

> If code P0944(35) is also set, follow diagnostic

procedure for code P0944(35) first

> Valve body - #1 ball check or LR switch valve

sticking - may also set code P-0736(56) or have
no Reverse

> Speed sensor or associated wiring - may also set

codes P0736(50), P0715(56), or P0720(57)

> Failed or intermittent slipping UD clutch - may

also set P0732(52), or P0733(53)

– UD seal leakage (intermittent)

– Worn input clutch hub bushing (hard code at

heavy throttle)

– Sticky UD accumulator seals (intermittent)

– Worn reaction shaft support seal rings (hard

code at heavy throttle)

– Solenoid pack (UD pressure in 4th gear)

> Failed or slipping LR clutch - may also set code

P0736(56) or have no Reverse

– LR seal leakage (Intermittent)

– Sticky LR accumulator seals (Intermittent)

Code P0732(52) - Excludes geartrain failures
which should be obvious upon disassembly

> If code P0944(35) is also set, follow diagnostic

procedure for code P0944(35) first

> Failed or slipping 2/4 clutch - may also set code

P0734(54)

– 2/4 seat leakage (intermittent)

– Sticky accumulator seals (intermittent)

> Failed or intermittent slipping UD clutch - may

also set code P0731(51) and/or P0733(53)

– UD seal leakage (intermittent)

– Worn input clutch hub bushing (hard code at

heavy throttle)

– Sticky UD accumulator seals (intermittent)

– Worn reaction shaft support seal rings (hard

code at heavy throttle)

– Solenoid pack (UD pressure in 4th gear)

Code P0733(53) - Excludes geartrain failures
which should be obvious upon disassembly

> If code P0944(35) is also set, follow diagnostic

procedure for code P0944(35) first

> Failed or slipping OD clutch - may also set code

P0734(54)

– OD and Reverse inner and outer lip seal

leakage (usually hard code)

– Sticky OD accumulator seals (intermittent)

– Worn reaction shaft support seal rings (hard

code at heavy throttle)

– Broken OD/UD tapered snap ring - (hard code

at heavy throttle)

> Failed or intermittent slipping UD clutch - may

also set code P0731(51) and/or P0732(52)

– UD seal leakage (intermittent)

– Worn input clutch hub bushing (hard code at

heavy throttle)

– Sticky UD accumulator seals (intermittent)

– Worn reaction shaft support seal rings (hard

code at heavy throttle)

– Solenoid pack (UD pressure in 4th gear)

Code P0734(54) - Excludes geartrain failures
which should be obvious upon disassembly

> If code P0944(35) is also set, follow diagnostic

procedure for code P0944(35) first

> Failed or slipping OD clutch - may also set code

P0733(53)

– OD and Reverse inner and outer lip seal

leakage (usually hard code)

– Sticky OD accumulator seals (intermittent)

– Worn reaction shaft support seal rings (hard

code at heavy throttle)

– Broken OD/UD tapered snap ring - (hard code

at heavy throttle)

> Failed or slipping 2/4 clutch - may also set code

P0732(52)

– 2/4 seal leakage (intermittent)

14

GENERAL INFORMATION

– Sticky accumulator seals (intermittent)

Codes P0715(56) and P0720(57)

> Failed input or output speed sensor (intermit-

tent or hard code)

> Shorted or open wiring between PCM and speed

sensor(s) (intermittent)

> PCM Connector problems and/or Speed Sensor

connector

Code P1794(58)

> Open or shorted speed sensor ground (speed

sensor ground is different from chassis ground)

> Open or shorted Temperature Sensor wiring to

TRS

> TRS - Will also set code P1799(74)

> PCM

Name of code: P0952(69) - AutoStick Sensor Cir-
cuit Low (If equipped)
When monitored: Whenever the engine is run-
ning.
Set condition:
1) The transmission shift lever is not in AutoStick
and either the upshift or downshift switch is
closed.
2) Upshift and downshift switches closed at the
same time.
Theory of operation: In the AutoStick Mode
(manual shift mode), upshifts and downshifts are
actuated manually. Shift requests are detected by
monitoring the upshift and downshift switches.
The PCM monitors the above set conditions. A set
condition will be tolerated for up to 15 seconds
before setting a code.
Transmission Effects: The OD position shift
schedule is substituted while operating in the
AutoStick gear selector position. No Limp-in mode
occurs.
Possible causes:

> Wiring or connector problems

> AutoStick switch failure

> PCM

Name of code: P1797(71) - Manual Shift Overheat
When monitored: Whenever the engine is run-
ning.
Set condition:

1. If the engine temperature exceeds 124°C

(255°F) while operating in AutoStick mode.

2. If the transmission temperature exceeds 135°C

(275°F) while in AutoStick mode

Theory of operation: Transmission and engine
temperatures are monitored during vehicle opera-
tion. If conditions occur causing the engine or
transmission to overheat, the AutoStick mode will
be canceled, and a code will be set.

Transmission Effects: The 3 position shift sched-
ule that is used in non-AutoStick applications is
substituted while operating in the AutoStick gear
selector position. No Limp-in mode occurs.
Possible causes:

> Engine overheat - refer to service manual for

diagnosis and repair

> Transmission Overheat

– Restricted transmission cooling system

– Transmission fluid overfilled

– Radiator fan not functioning properly

– Extended driving in low gear

NOTE: Strenuous driving conditions may
cause the vehicle to overheat. If the driver
operates in or initiates AutoStick with an
overheated vehicle, the code will be set.

Name of code: P0897(73) - Worn Out/Burnt Trans-
axle Fluid
When monitored: At every Fully Electronically
Modulated Converter Clutch (FEMCC) to Partial
Electronically

Modulated

Converter

Clutch

(PEMCC) transition miles when A/C compressor
clutch is being cycled.
Set condition: The code will be set if vehicle
shudder is detected 20 times when the A/C clutch is
cycled.
Theory of operation: While in 3rd or 4th FEMCC
and just before the A/C clutch engages, the Power-
train Control Module (PCM) requests the Trans-
mission Control System to momentarily establish
PEMCC operation. If vehicle shudder is detected
during the FEMCC to PEMCC transition, a
counter is incremented. If the count reaches 20, the
trouble code is set. The driver may then notice
harsh bumps when the A/C clutch is being cycled,
but vehicle shudder will be eliminated. After 35
OBDII (EURO STAGE III OBD) warm-up cycles or
if the code is cleared, PEMCC will be reactivated to
see if shudder is still present. If one shudder event
occurs, the code will be reset. Clearing the code and
running battery disconnect with the DRBIII

t is the

only way to reset the shudder counter from 20 back
to zero.
Transmission Effects: This code does not cause
the transmission to go into Limp-in mode. How-
ever, once the code is set, FEMCC to PEMCC
operation before the A/C clutch engagement will be
disabled for 35 OBDII (EURO STAGE III OBD)
warm up starts.
Possible causes:

> Degraded transmission fluid

> Wheels severely out of alignment

> Internal torque converter problem

15

GENERAL INFORMATION

Name of code: P0218(75) - High Temperature
Operation Activated.

NOTE: This DTC is an informational DTC
designed to aid the technician in diagnosing
shift quality concerns.

When monitored: Whenever the engine is run-
ning.
Set condition: Immediately once the Overheat
Shift Schedule is activated.
Theory of operation: If the transmission oil
temperature rises above 115°C (240°F), the over-
heat shift schedule is activated refer to Transmis-
sion Operation as a function of Transmission Oil
Temperature and the code is set. The DTC is an
information code only and is being set to aid the
technician in determining root cause of a customer
driveability issue. The code is also intended to alert
the technician to determine if a cooling system
malfunction has occurred or if an additional trans-
mission air to oil cooler should be added to the
vehicle if the customer regularly drives in a man-
ner that overheats the transmission. Extended
operation above 115°C (240°F) will reduce the
durability of the transmission and should be
avoided. Correcting the cooling system malfunction
or installing an additional transmission oil cooler
will improve transmission durability especially for
customers who operate in city/construction stop
and go traffic, tow trailers regularly, drive aggres-
sively in low gear or drive regularly in mountain-
ous areas.
Transmission effects: Information only code. -
Overheat shift schedule was activated, no Limp-in
condition occurs. 2nd gear partial EMCC above 40
Km/h (25 MPH), 3rd gear EMCC from 45-69 Km/h
(28-43 MPH), delayed 3-4 upshift at 69 Km/h (43
MPH), early 4-3 coastdown at 66 Km/h (41 MPH),
EMCC operation under all conditions above 40
Km/h (25 MPH) except at closed throttle or 1st
gear.
Possible causes:

– Transmission Overfilled with Oil

– Engine cooling fan failure

– Engine thermostat stuck closed

– Radiator corroded or packed with dirt

– Transmission Oil Cooler Plugged

– Customer driving pattern requires additional

transmission cooling

Name of code: P0884(76) - Power-Up at Speed
When monitored: When PCM (transmission con-
trol module) initially powers-up.
Set condition: If the PCM powers up while in the
‘‘Drive’’ position and the vehicle is going above 32
Km/h (20 MPH), the code is set.

Theory of operation: If a vehicle loses power to
the PCM, the vehicle will go to the 2nd gear mode
since there is no power available to control the
transmission solenoids. However if power is re-
stored, the PCM will power-up and normal opera-
tion will be restored. This DTC identifies that
power to the PCM was restored when the gear
selector was in a ‘‘Drive’’ position while the vehicle
was moving at speeds above 32 Km/h (20 MPH). If
someone shifts to Neutral and cycles the ignition
key and quickly shifts to ‘‘Drive’’ while moving
before the PCM comes out of its START ROUTINE,
the DTC can be set. Therefore it is critical that this
DTC diagnosis repair procedure should only be
used if the vehicle is experiencing intermittent 2nd
gear operation and subsequently a return to nor-
mal operation during normal driving.
Transmission effects: No Limp-in condition. The
DTC is for information only when trying to diag-
nosis intermittent 2nd gear operation and subse-
quently a return to normal operation.
Possible causes:

– No Problem if vehicle is started in ‘‘neutral’’ at

speeds above 32 Km/H (20 MPH) and shifted
quickly to ‘‘Drive’’ before PCM comes out of
the START ROUTINE.

FOR INTERMITTENT 2ND GEAR OPERA-
TION AND THEN A SUBSEQUENT RETURN
TO NORMAL OPERATION WITHOUT CY-
CLING THE IGNITION KEY

– Intermittent Direct Battery connection be-

tween PCM and battery.

– Intermittent Fused Ignition Switch Output

between PCM and ignition switch.

– Intermittent Ground to PCM.

Name of code: P1687(77) - No Communication
with the MIC
When monitored: Continuously with key on.
Set condition: If no PCI bus messages are re-
ceived from the Mechanical Instrument Cluster
(MIC) for 25 seconds.
Theory of operation: The PCM communicates
with the MIC using the PCI bus. It relies on certain
information to function properly. The PCM contin-
uously monitors the PCI bus to check for messages
broadcast from the PCM.
Transmission effects: Possible improper PCM
AutoStick configuration.
Possible causes:

> Open or shorted PCI bus circuit from MIC

> MIC

> PCM

Name of code: P1652(78) - Serial Communication
Link Malfunction
When monitored: Continuously with key on.

16

GENERAL INFORMATION

Set condition: If no PCI bus messages are received
by the Transmission Control System for 10 seconds.
Theory of operation: The PCM communicates
with the other modules in the vehicle using the PCI
bus. It relies on certain information to function
properly. The PCM continuously monitors the PCI
bus to check for messages broadcast from the
certain modules.
Transmission Effects: Possible improper PCM
AutoStick configuration and delayed 3-4 shifts. No
EMCC and early 3-4 shifts for a few minutes after
engine is started.
Possible causes:

> Open or shorted PCI bus circuit from BCM

> PCM

Name of code: P0562(79) Low Battery Voltage
When monitored: Continuously with engine run-
ning and Transmission Relay energized.
Set condition: If the voltage sensed at the Trans-
mission Control Relay Output Sense circuit(s) to
the PCM is less than 10.0 volts for the period of 15
seconds. The DTC will also set if the direct battery
voltage sensed in the PCM is less than 6.5v for
200ms or where Transmission Control Relay Out-
put Sense circuit (switched battery) is less than
7.2v for 200ms.

NOTE: P0562 generally indicates a gradually
falling

battery

voltage

or

a

resistive

connection(s) to the PCM.

Theory of operation: The Transmission system
requires sufficient battery voltage in order to ener-
gize the transmission solenoids. The PCM contin-
uously monitors the voltage available to the sole-
noids.
Transmission effects: At speeds above 72 Km/h
(45 MPH) the transmission system will default to
neutral. Below 72 Km/h (45 MPH) the transmis-
sion system will default to Limp-in mode and the
MIL will illuminate after 5 minutes of substituted
operation. Manual gear selection of Park, Reverse,
Neutral and Second will be available.
Possible causes:

> Charging system problem

> Poor/High resistance connection between PCM

and Battery/Alternator

> PCM high resistance or poor connection

> PCM ground high resistance or poor connection

> High resistance in Transmission Control Relay

contacts

> PCM

Name of code: P0711(7A) - Transmission temper-
ature sensor performance
When monitored: Every 7 milliseconds with the
engine running and no loss of prime DTC set.

Set condition: A temperature reading of 80°F is
not reached in the specified period of time.
Theory of operation: The temperature sensor
(thermistor) is used to sense the temperature of the
transmission fluid. Transmission fluid tempera-
ture can affect shift quality, torque converter lock-
up, and when and if some diagnostics are run. A
failed temperature sensor could affect the OBDII
diagnostics, therefore when a fault is detected in
the temperature sensor circuit, transmission tem-
perature will be based on a calculated temperature
value.
Transmission effects: When the fault is set,
calculated temperature is substituted for mea-
sured temperature, however the fault code is
stored only after three consecutive occurrences of
the fault.
Possible causes:

> Temperature sensor

> Temperature sensor wiring circuit.

> Internal controller

Name of code: P0712(7B) - Transmission temper-
ature sensor low
When monitored: Every 7 milliseconds with the
engine running and no loss of prime DTC set.
Set condition: Sensor output voltage less than
0.078v.
Theory of operation: The temperature sensor
(thermistor) is used to sense the temperature of the
transmission fluid. Transmission fluid tempera-
ture can affect shift quality, torque converter lock-
up, and when and if some diagnostics are run. A
failed temperature sensor could affect the OBDII
diagnostics, therefore when a fault is detected in
the temperature sensor circuit, transmission tem-
perature will be based on a calculated temperature
value.
Transmission effects: When the fault is set,
calculated temperature is substituted for mea-
sured temperature, however the fault code is
stored only after three consecutive occurrences of
the fault.
Possible causes:

> Temperature sensor

> Temperature sensor wiring circuit.

> Internal controller

Name of code: P0713(7C) - Transmission temper-
ature sensor high
When monitored: Every 7 milliseconds with the
engine running and no loss of prime DTC set.
Set condition: Sensor output voltage greater than
4.94v.
Theory of operation: The temperature sensor
(thermistor) is used to sense the temperature of the
transmission fluid. Transmission fluid tempera-

17

GENERAL INFORMATION