Chrysler Town, Dodge Caravan. Manual — part 1013
TEST
ACTION
APPLICABILITY
2
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 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 3
3
With the DRBIII
t, read Transmission DTC’s
Are there any Transmission Control Relay related DTC’s P0888, P0890, or P0891
present?
All
Yes
→ Refer to the Transmission category and perform the appropriate
symptom.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 4
4
With the DRBIII
t, 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?
All
Yes
→ Go To 5
No
→ Go To 11
5
Turn the ignition off to the lock position.
Remove the Starter Relay.
CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO
RESPONSE, condition and disable the starter.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmis-
sion Adapter kit, Miller tool #8333-1A.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
On the Transmission Simulator select L/R on the Pressure Switch selector switch.
With the DRBIII
t, monitor the L/R Pressure Switch state while pressing the
Pressure Switch Test button on the Transmission Simulator.
Did the Pressure Switch state change from OPEN to CLOSED when the test button
was pressed?
All
Yes
→ Replace the Transmission Solenoid/Pressure Switch Assembly per
the Service Information.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 6
88
TRANSMISSION - EATX
P0841-LR PRESSURE SWITCH SENSE CIRCUIT —
Continued
TEST
ACTION
APPLICABILITY
6
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 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 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 7
No
→ Repair the Transmission Control Relay Output circuit for an open
or high resistance. If the fuse is open make sure to check for a
short to ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
7
Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the L/R Pressure Switch Sense circuit from the TCM
harness connector to the Transmission Solenoid/Pressure Switch Assembly harness
connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the L/R Pressure Switch Sense circuit for an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 8
8
Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
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 circuit for a short to ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 9
9
Turn the ignition off to the lock position.
Disconnect the TCM 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 in the Transmission Control Relay connector.
Ignition on, engine not running.
Measure the voltage of the L/R Pressure Switch Sense circuit.
Is the voltage above 0.5 volt?
All
Yes
→ Repair the L/R Pressure Switch Sense circuit for a short to
voltage.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 10
89
TRANSMISSION - EATX
P0841-LR PRESSURE SWITCH SENSE CIRCUIT —
Continued
TEST
ACTION
APPLICABILITY
10
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 Transmission Control Module per the Service Infor-
mation. WITH THE DRBIII
t PERFORM QUICK LEARN AND
REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
11
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring 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 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Test Complete.
90
TRANSMISSION - EATX
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 TCM momentarily turns on element pressure to the clutch circuits that do not
have pressure to identify the correct pressure switch closes. If the pressure switch does not
close 2 times the DTC sets.
POSSIBLE CAUSES
LOSS OF PRIME P0944 PRESENT
RELATED DTC’S PRESENT
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
INTERNAL TRANSMISSION
TRANSMISSION CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
91
TRANSMISSION - EATX
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