2001 CHRYSLER VOYAGER clutch

Symptom:
P1788-2/4 HYDRAULIC PRESSURE TEST FAILURE
When Monitored and Set Condition:
P1788-2/4 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 > 1000 RPM, the TCM
momentarily turns on element pressure to the clutch ckts that don't have pressure to
identify the correct pressure sw closes. If the pressure sw does not close 2 times the code
sets.
POSSIBLE CAUSES
LOSS OF PRIME P1791 PRESENT
RELATED DTC'S PRESENT
TRANSMISSION FLUID LEVEL
INTERMITTENT WIRING AND CONNECTORS
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
TCM - 2/4 HYDRAULIC PRESSURE
11 8
TRANSMISSION

Symptom:
P1789-2-4/OD HYDRAULIC PRESSURE TEST FAILURE
When Monitored and Set Condition:
P1789-2-4/OD 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 > 1000 RPM, the TCM
momentarily turns on element pressure to the clutch ckts that don't have pressure to
identify the correct pressure sw closes. If the pressure sw does not close 2 times the code
sets.
POSSIBLE CAUSES
CONDITION P1789 PRESENT
TEST ACTION APPLICABILITY
1NOTE: 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 DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, 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 P0705 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 Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the symptom.
Perform this procedure prior to Symptom diagnosis.All
Continue
Go To 2
2NOTE: The vehicle must be driven to set this DTC, the transmission must be
warm or hot with the Engine RPM above 1000 RPM.
This DTC is an indicator of 2/4 and/or O/D Hydraulic Pressure Switch DTC's present.
Perform the tests for P1787 and/or P1788 determine which switch is failing.
If there are no possible causes remaining, view repair.All
Repair
Refer to symptom list for problems related to Transmission and
perform tests for P1787 and/or P1788.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
122
TRANSMISSION

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Remove the Transmission Oil Pan and Oil Filter per the Service Information.
Install a new Transmission Oil Filter per Service Information.
Reinstall Transmission Oil Pan, and refill with new Transmission Fluid per the
Service Information.
Note: The Transmission Cooler must be flushed before prodceeding.
Start the engine, check and adjust the Transmission Fluid Level per Service
Information.
Allow the engine to idle for 10 minutes, in Park.
Flush the Transmission Oil Cooler per the Service Information.
Turn the ignition off.
Drain and refill the Transmission Fluid.
Flush the Transmission Oil Cooler again.
Start the engine, check and adjust the Transmission Fluid Level per Service
Information.
With the DRBIIIt, perform a Battery Disconnect.
Note: This must be done to re enable EMCC during an A/C Clutch engage-
ment.
The vehicle may exhibit intermittent shudder during the first few hundred miles.
Note: The oil will gradually penetrate the TCC friction material and the
shudder should disappear.
Erase the DTC and return the vehicle to the customer.
Did the Code reset or does the vehicle still shudder after a few thousand miles?All
Ye s®Replace the Torque Convertor per the Service Information. Note:
After replacing the Torque Convertor, use the DRBIII to perform
the TCC Break In procedure. This will prevent possible shudder
conditions.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
141
TRANSMISSION
P1798-WORN OUT/BURNT TRANSAXLE FLUID ÐContinued

DIAGNOSTIC JUNCTION PORT - BLACK 16 WAYCAV CIRCUIT FUNCTION
1 D25 20WT/VT PCI BUS (PCM/SKIM)
2 D25 20WT/VT PCI BUS (HVAC)
3 D25 20WT/VT PCI BUS (RADIO)
4 D25 20WT/VT PCI BUS (ORC)
5 D25 20WT/VT PCI BUS (CLUSTER)
6 D25 20WT/VT PCI BUS (BCM)
7 D25 20WT/VT PCI BUS (DLC)
8 D25 20WT/VT PCI BUS (OVERHEAD CONSOLE)
9 D25 20WT/VT PCI BUS (IPM)
10 D25 20WT/VT PCI BUS (LSIACM)
11 D25 20WT/VT PCI BUS (MEMORY SEAT/MIRROR)
12 D25 20WT/VT PCI BUS (PWR DOOR/ LT, RT LIFTGATE)
13 D25 20WT/VT PCI BUS (RSIACM)
14 - -
15 - -
16 - -
INPUT SPEED SENSOR (3.3L/3.8L) - GRAY 2 WAYCAV CIRCUIT FUNCTION
1 T13 18DG/VT SPEED SENSOR GROUND
2 T52 18DG/WT INPUT SPEED SENSOR SIGNAL
INTELLIGENT POWER MODULE C3 - NATURAL 20 WAYCAV CIRCUIT FUNCTION
1 Z115 20BK/OR (3.3L/3.8L) GROUND
2 F1 18PK/WT (3.3L/3.8L) FCM OUTPUT (UNLOCK-RUN-START)
3 T751 18YL (3.3L/3.8L) FUSED IGNITION SWITCH OUTPUT (START)
4 T2 18DG/WT TRS REVERSE SENSE
5 T16 18YL/OR (3.3L/3.8L) TRANSMISSION SAFETY SHUTDOWN RELAY OUTPUT
6 T15 18YL/BR (3.3L/3.8L) TRANSMISSION CONTROL RELAY CONTROL
7 C3 18DB/YL A/C COMPRESSOR CLUTCH RELAY OUTPUT
8 K31 18BR FUEL PUMP RELAY CONTROL
9 C13 18LB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL
10 A104 18YL/RD (3.3L/3.8L) FUSE B(+)
11 - -
12 - -
13 D25 18WT/VT (3.3L/3.8L) PCI BUS (EATX)
14 T752 18DG/OR ENGINE STARTER MOTOR RELAY CONTROL
15 Z116 18BK/VT GROUND
16 K51 18BR/WT AUTOMATIC SHUTDOWN RELAY CONTROL
17 F202 18PK/GY IGNITION SWITCH OUTPUT (RUN-START)
18 K173 18BR/VT RADIATOR FAN RELAY CONTROL
19 F202 18PK/GY IGNITION SWITCH OUTPUT (RUN-START)
20 A109 18OR/RD FUSED B(+)
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CONNECTOR PINOUTS

POWERTRAIN CONTROL MODULE C2 - GRAY/GRAY 40 WAYCAV CIRCUIT FUNCTION
41 V37 18VT SPEED CONTROL SWITCH SIGNAL
42 C18 18LB/BR A/C PRESSURE SIGNAL
43 K900 18DB/DG SENSOR GROUND
44 F888 18BR/PK 8 VOLT SUPPLY
45 - -
46 A109 18OR/RD FUSED B(+)
47 - -
48 K40 18BR/LG (2.4L) IDLE AIR CONTROL NO. 3 DRIVER
49 K39 18VT/DG (3.3L/3.8L) IDLE AIR CONTROL NO. 1 DRIVER
49 K60 18VT/LG (2.4L) IDLE AIR CONTROL NO. 2 DRIVER
50 Z131 18BK/DG GROUND
51 K141 18DB/YL OXYGEN SENSOR 1/2 SIGNAL
52 - -
53 - -
54 - -
55 - -
56 V36 18VT/YL SPEED CONTROL VACUUM SOLENOID CONTROL
57 K39 18VT/DG (2.4L) IDLE AIR CONTROL NO. 1 DRIVER
57 K60 18VT/LG (3.3L/3.8L) IDLE AIR CONTROL NO. 2 DRIVER
58 K59 18BR/DG (2.4L) IDLE AIR CONTROL NO. 4 DRIVER
59 D25 18WT/VT PCI BUS
60 - -
61 F855 18PK/YL 5 VOLT SUPPLY
62 B29 18DG/WT BRAKE SWITCH SENSE
63 T10 18DG/LG (3.3L/3.8L) TORQUE MANAGEMENT REQUEST SENSE
64 C13 18LB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL
65 D21 18WT/BR SCI TRANSMIT
66 N7 18DB/OR VEHICLE SPEED SENSOR OUTPUT
67 K51 18BR/WT AUTOMATIC SHUTDOWN RELAY CONTROL
68 K52 18DB/WT EVAPORATIVE EMISSION SOLENOID CONTROL
69 - -
70 K70 18DB/BR EVAPORATIVE EMISSION SOLENOID SENSE
71 - -
72 K107 18VT/WT LEAK DETECTION PUMP SWITCH SENSE
73 K173 18BR/VT RADIATOR FAN RELAY CONTROL
74 K31 18BR FUEL PUMP RELAY CONTROL
75 D20 18WT/LG SCI RECEIVE
76 T41 18YL/DB PARK/NEUTRAL POSITION SWITCH SENSE (TRS T41)
77 K106 18VT/LB LEAK DETECTION PUMP SOLENOID CONTROL
78 K54 18DB/WT (2.4L) TORQUE CONVERTER CLUTCH SOLENOID CONTROL
79 - -
80 V35 18VT/OR SPEED CONTROL VENT SOLENOID CONTROL
RIGHT REAR LAMP ASSEMBLY - BLACK 6 WAYCAV CIRCUIT FUNCTION
1 L62 18WT/BR RIGHT REAR TURN SIGNAL DRIVER
2- -
3 L78 18WT/OR FUSED RIGHT PARK LAMP RELAY OUTPUT
4 L1 18WT/LG BACK-UP LAMP DRIVER
5 Z362 18BK/BR GROUND
6 L50 18WT/TN BRAKE LAMP SWITCH OUTPUT
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CONNECTOR PINOUTS

SOLENOID/PRESSURE SWITCH ASSEMBLY (3.3L/3.8L) - BLACK 8 WAYCAV CIRCUIT FUNCTION
1 T47 18YL/DG 2-4 PRESSURE SWITCH SENSE
2 T50 18YL/TN LOW/REVERSE PRESSURE SWITCH SENSE
3 T9 18DG/TN OVERDRIVE PRESSURE SWITCH SENSE
4 T16 18YL/OR TRANSMISSION SAFETY SHUTDOWN RELAY OUTPUT
5 T59 18YL/LB UNDERDRIVE SOLENOID CONTROL
6 T60 18YL/GY OVERDRIVE SOLENOID CONTROL
7 T20 18DG/WT LOW/REVERSE SOLENOID CONTROL
8 T19 18YL/DB 2-4 SOLENOID CONTROL
THROTTLE POSITION SENSOR - GRAY 3 WAYCAV CIRCUIT FUNCTION
1 K900 18DB/DG SENSOR GROUND
2 K22 18BR/OR THROTTLE POSITION SENSOR SIGNAL
3 F855 18PK/YL 5 VOLT SUPPLY
TORQUE CONVERTER CLUTCH SOLENOID (2.4L) - BLACK 3 WAYCAV CIRCUIT FUNCTION
1- -
2 F202 18PK/GY FUSED IGNITION SWITCH OUTPUT (RUN-START)
3 K54 18DB/WT TORQUE CONVERTER CLUTCH SOLENOID CONTROL
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CONNECTOR PINOUTS