Dodge Neon / Neon SRT-4. Manual - part 648

TEST

ACTION

APPLICABILITY

Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the L/R Pressure Switch Sense circuit from the appropriate
terminal of special tool #8815 to the Transmission Solenoid/Pressure Switch Assem-
bly harness connector.
Is the resistance above 5.0 ohms?

All

Yes

→ Repair the L/R Pressure Switch Sense circuit for an open.

Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

→ Go To 8

Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance between ground and the L/R Pressure Switch Sense circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the L/R Pressure Switch Sense circuit for a short to

ground.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

→ Go To 9

Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B+ circuit and Transmission Control Relay
Output circuit.
Ignition on, engine not running.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the voltage of the L/R Pressure Switch Sense circuit.
Is the voltage above 0.5 volts?

All

Yes

→ Repair the L/R Pressure Switch Sense circuit for a short to

voltage.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

→ Go To 10

106

TRANSMISSION - NGC

P0841-LR PRESSURE SWITCH SENSE CIRCUIT —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B+ circuit and the Transmission Control
Relay Output circuit in the Transmission Control Relay connector.
Using a 12-volt test light connected to ground, check the Transmission Control Relay
Output circuit in the Transmission Solenoid/Pressure Switch Assembly harness
connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?

All

Yes

→ Go To 11

→ Repair the Transmission Control Relay Output circuit for an

open. If the fuse is open make sure to check for a short to ground.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

Using the schematics as a guide, inspect the wiring and connectors. Repair as
necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.

All

Repair

Replace the Powertrain Control Module per the Service Informa-
tion. WITH THE DRBIII

t PERFORM QUICK LEARN AND

REPROGRAM PINION FACTOR.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

The conditions necessary to set the DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wires while checking for shorted and open circuits.
With the DRBIII

t, check the EATX EVENT DATA to help identify the conditions in

which the DTC was set.
Were there any problems found?

All

Yes

→ Repair as necessary.

Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

→ Test Complete.

107

TRANSMISSION - NGC

P0841-LR PRESSURE SWITCH SENSE CIRCUIT —

Continued

Symptom:

P0845-2/4 HYDRAULIC PRESSURE TEST FAILURE

When Monitored and Set Condition:

P0845-2/4 HYDRAULIC PRESSURE TEST FAILURE

When Monitored:

In any forward gear with engine speed above 1000 RPM, shortly after

a shift and every minute thereafter.

Set Condition:

After a shift into a forward gear, with engine speed greater than 1000

RPM, the PCM momentarily turns on element pressure to the clutch circuits that don’t
have pressure to verify that the correct pressure switch closes. If the pressure switch does
not close 2 times the DTC sets.

POSSIBLE CAUSES

LOSS OF PRIME P0944 PRESENT

TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN

2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN

2/4 PRESSURE SWITCH CIRCUIT SHORT TO GROUND

INTERNAL TRANSMISSION

2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

TRANSMISSION SOLENOID/TRS ASSEMBLY

POWERTRAIN CONTROL MODULE

INTERMITTENT WIRING AND CONNECTORS

108

TRANSMISSION - NGC

TEST

ACTION

APPLICABILITY

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

t, read Engine DTC’s. Check and repair all Engine DTC’s prior to

performing any transmission symptom diagnostics.
With the DRBIII

t, 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 test
for 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.

All

Continue

Go To

With the DRBIII

t, check for other Transmission DTC’s.

Is the DTC P0944 present also?

All

Yes

→ Refer to the Transmission category and perform the appropriate

symptom.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.

→ Go To 3

With the DRBIII