Monday, July 11, 2011
2004 Dodge Neon SE Transmission Diagnostic Procedure
SYMPTOM: P0841-LR PRESSURE SWITCH SENSE CIRCUIT
When Monitored and Set Condition:
When Monitored: Whenever the engine is running.
Set Condition: The DTC is set if one of the pressure switches are open or closed at the wrong time in a given gear.
Possible Causes
RELATED RELAY DTC’S PRESENT
LOSS OF PRIME P0944 PRESENT
L/R PRESSURE SWITCH SENSE CIRCUIT OPEN
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
L/R PRESSURE SWITCH
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
Diagnostic Procedure
1. NOTE: Low fluid level can be the cause of many transmission problems. If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms.
With the DRBIII(R), read Engine DTC’s. Check and repair all Engine DTC’s prior to performing any transmission symptom diagnostics.With the DRBIII (R), read Transmission DTC’s. Record all DTC’s and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.Perform the Shift Lever Position Test. If the test does not pass, refer to SYMPTOM: P0706-CHECK SHIFTER. SIGNAL .For Gear Ratio DTC’s, check and record all CVI’s.Most DTC’s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run.
NOTE: Verify flash level of Powertrain Control Module. Some problems are corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to Symptom diagnosis.
Continue: Go To 2
2. With the DRBIII(R), read Transmission DTC’s
Are there any Transmission Control Relay DTC’s present also?
Yes : Refer to the TRANSMISSION category and perform the appropriate symptom.
Perform VERIFICATION TESTS .
No : Go To 3
3. With the DRBIII(R), check for other Transmission DTC’s.
Is the DTC P0944 present also?
Yes : Refer to the TRANSMISSION category and perform the appropriate symptom.
Perform VERIFICATION TESTS .
No : Go To 4
4. With the DRBIII(R), Check the STARTS SINCE SET counter for P0841.
NOTE: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter 2 or less?
Yes : Go To 5
No : Go To 12
5. Turn the ignition off to the lock position. Remove the Starter Relay.
download: http://ww2.justanswer.com/uploads/VirtualWrench/2010-09-25_235205_841.pdf
