2000 CHRYSLER VOYAGER clutch

Symptom:
P-0740 TORQUE CONV CLUTCH, NO RPM DROP AT LOCKUP
When Monitored and Set Condition:
P-0740 TORQUE CONV CLUTCH, NO RPM DROP AT LOCKUP
When Monitored: Continuously when no matured or maturing Trouble Code and throttle
position >10% and constant for 4.4 seconds before TCC engagement requested: No TCC
solenoid circuit, any cam/crank-related code, VSS, any TPS-related code and Battery
voltage >11.0
Set Condition: Torque Converter malfunctions that are detected are the FTC not locking
up properly when desired, and the torque converter not unlocking properly when desired.
3 consecutive test failures over one trip will store the code. 2 bad trips will set the code.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
DIFF, SHAFT, OR GEARS DEFECTIVE
TCC SOL DEFECTIVE
TORQUE CONVERTER ASSEMBLY DEF OR TCC SOL STUCK
TRANSMISSION FLUID DIRTY OR LEVEL LOW
VEHICLE CONFIGURATION NON-STANDARD
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read codes.
Is the Global Good Trip displayed and equal to 0?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 2
No®Test Complete.
2 Ignition Off
At the9Cooler In9port puta0to300PSIgauge using a9T9. Ensure line is long
enough to reach in driver's side of vehicle so gauge can be monitored while driving.
Road test vehicle. Gear select in drive. While monitoring DRB, achieve 50 MPH.
While doing this, notice the gauge will read around 15 PSI until lockup is achieved
in 3rd gear. If the TCC Solenoid is operating properly, the gauge pressure will
fluctuate when lockup is achieved.
Did gauge fluctuate?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 3
No®Refer to service instructions for proper service procedure on
Torque Converter Assembly or stuck TCC Solenoid and repair as
necessary.
Perform Powertrain Verification Test VER-5A.
302
TRANSMISSION
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TEST ACTION APPLICABILITY
3 Ignition Off
Check Transmission Fluid level and ensure it is clear of any debris.
Is the Transmission Fluid okay?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 4
No®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
4 Ignition Off
Disconnect the TCC Solenoid connector.
Note: Check connectors - Clean/repair as necessary.
Turn key on.
Use a Voltmeter in the following step.
Using a Voltmeter, measure the Fused Ignition Switch Output Circuit at Solenoid
Connector.
Is the voltage above 10.0 volts?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 5
No®Repair the open Fused Ignition Switch Output Circuit.
Perform Powertrain Verification Test VER-5A.
5 Ignition Off
Disconnect the TCC Solenoid connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure across the Solenoid for resistance.
Was resistance between 30.0 and 50.0 ohms?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 6
No®Replace TCC Solenoid.
Perform Powertrain Verification Test VER-5A.
6 Drive Vehicle
Maintain 50 MPH per DRB. Wait 10 seconds in lockup. Record Engine RPM.
Was engine RPM 2200 +/- 50 RPM?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 7
No®Inspect Differential, Output Shaft, or Gear Box. Refer to service
instructions for proper diagnosis.
Perform Powertrain Verification Test VER-5A.
7 Ignition Off
Remove VSS.
Note: Check connectors - Clean/repair as necessary.
Inspect sensor and gear for damage, also improper wheel size.
Were any problems found?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
303
TRANSMISSION
P-0740 TORQUE CONV CLUTCH, NO RPM DROP AT LOCKUP ÐContinued
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Symptom:
P-0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
When Monitored and Set Condition:
P-0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
When Monitored: With the ignition key on.
Set Condition: An open or shorted condition is detected in the Torque Converter Clutch
Solenoid Control Circuit.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
TORQUE CONVERTER CLUTCH SOLENOID DEFECTIVE
TCC SOLENOID CIRCUIT W/H INTERMITTENT DEFECT
TCC SOLENOID CIRCUIT W/H OBSERVABLE DEFECT
TCC SOLENOID CONTROL CIRCUIT OPEN
TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
PCM DEFECTIVE (TCC SOLENOID CONTROL CIRCUIT)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read codes.
Is the Global Good Trip displayed and equal to 0?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 2
No®Go To 7
2 Ignition Off
Disconnect the TCC Solenoid Connector.
Note: Check connectors - Clean/repair as necessary.
Key on.
With the Voltmeter, probe the voltage of the Fused Ignition Switch Output Circuit at
Solenoid Connector.
Is the voltage above 10.0 volts?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 3
No®Repair the open Fused Ignition Switch Output Circuit..
Perform Powertrain Verification Test VER-5A.
304
TRANSMISSION
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TEST ACTION APPLICABILITY
3 Ignition Off
Disconnect the Powertrain Control Module.
Note: Check connectors - Clean/repair as necessary.
Key on.
With the voltmeter, probe the TCC Solenoid Control Circuit at the PCM connector.
Is the voltage above 10.0 volts?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 4
No®Replace the TCC Solenoid.
Perform Powertrain Verification Test VER-5A.
4 Ignition Off
Disconnect the Powertrain Control Module Connector.
Disconnect the TCC Solenoid Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the TCC Solenoid Control Circuit from the TCC
Solenoid Connector to the PCM Connector.
Is the resistance below 5.0 ohms?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 5
No®Repair the open TCC Solenoid Control Circuit.
Perform Powertrain Verification Test VER-5A.
5 Ignition Off
Disconnect the Powertrain Control Module Connector.
Disconnect the TCC Solenoid Connector.
Note: Check connectors - Clean/repair as necessary.
With the DRB in ohmmeter mode, measure between the TCC Solenoid Control
Circuit and ground.
Is the resistance below 5.0 ohms?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Repair the TCC Solenoid Control Circuit short to ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 6
6 If there are no potential causes remaining, the PCM is assumed to be defective.
View repair options.TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Repair
Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-5A.
7 Ignition On, Engine Not Running
With the DRB, erase codes.
Turn ignition off for 10 seconds, then turn ignition on.
With the DRB actuate the TCC Solenoid.
With the DRB, read codes.
Wiggle Wiring Harness from the Solenoid to PCM.
Does the TCC Solenoid Control Circuit code return?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Repair as necessary where wiggling caused problem to appear.
Perform Powertrain Verification Test VER-5A.
No®Go To 8
305
TRANSMISSION
P-0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT ÐContinued
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TEST ACTION APPLICABILITY
8 Ignition Off
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
306
TRANSMISSION
P-0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT ÐContinued
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9.0 CONNECTOR PINOUTS
A/C COMPRESSOR CLUTCH - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 C3 18DB/BK A/C CLUTCH COMPRESSOR RELAY OUTPUT
2 Z1 18BK GROUND
AMBIENT TEMPERATURE SENSOR - GRAY 2 WAYCAV CIRCUIT FUNCTION
1 G31 20VT/LG AMBIENT TEMPERATURE SENSOR SIGNAL
2 G32 20BK/LB SENSOR GROUND
AMBIENT TEMPERATURE SENSOR (SENSOR SIDE) 2 WAYCAV CIRCUIT FUNCTION
1 - AMBIENT TEMPERATURE SENSOR SIGNAL
2 - SENSOR GROUND
BRAKE LAMP SWITCH - GRAY 6 WAYCAV CIRCUIT FUNCTION
1 K29 20WT/PK BRAKE SWITCH SENSE
2 Z1 20BK GROUND
3 V32 20YL/RD SPEED CONTROL ON/OFF SWITCH SENSE
4 V30 20DB/RD SPEED CONTROL BRAKE SWITCH OUTPUT
5 L50 18WT/TN BRAKE LAMP SWITCH OUTPUT
6 F32 18PK/DB FUSED B(+)
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CONNECTOR PINOUTS
ProCarManuals.com

CLOCKSPRING C3 - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 X10 20RD/DB RADIO MUX
2 X20 20RD/BK RADIO CONTROL MUX
CLUTCH INTERLOCK SWITCH (MTX) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 F45 20YL/RD (RHD) IGNITION SWITCH OUTPUT (START)
1 F45 20YL (LHD) IGNITION SWITCH OUTPUT (START)
2 T141 20YL/RD IGNITION SWITCH OUTPUT (START)
CLUTCH INTERLOCK SWITCH JUMPER (EATX) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 T141 20YL/RD (RHD) IGNITION SWITCH OUTPUT (START)
1 T141 20YL (LHD) IGNITION SWITCH OUTPUT (START)
2 T141 20YL/RD (RHD) IGNITION SWITCH OUTPUT (START)
2 T141 20YL (LHD) IGNITION SWITCH OUTPUT (START)
CRANKSHAFT POSITION SENSOR - BLACK 3 WAYCAV CIRCUIT FUNCTION
1 K7 18OR 8V SUPPLY
2 K4 18BK/LB SENSOR GROUND
3 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
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CONNECTOR PINOUTS
ProCarManuals.com

FUSESFUSE
NO.AMPS FUSED CIRCUIT FEED CIRCUIT
1 15A INTERNAL A0 6RD
2 20A (GAS/EATX) INTERNAL A0 6RD
3 20A INTERNAL A0 6RD
4 10A INTERNAL A0 6RD
5 10A INTERNAL A0 6RD
6 15A F41 20PK/VT A0 6RD
7 20A INTERNAL A0 6RD
8 20A L43 18VT INTERNAL
9 15A L44 20VT/RD INTERNAL
10 25A A20 12RD/DB A0 6RD
11 20A F32 18PK/DB A0 6RD
12 10A A22 12BK/OR F23 18DB/YL
13 10A F14 18LG/YL INTERNAL
14 20A L9 18BK/VT A0 6RD
15 10A M1 20PK A0 6RD
16 - SPARE A0 6RD
17 - SPARE A0 6RD
18 10A L33 20RD INTERNAL
19 10A L34 20RD/OR A0 6RD
19 10A L34 20RD/OR A0 6RD
101 40A INTERNAL A0 6RD
102 40A A10 12RD/DG A0 6RD
103 40A A2 12PK/BK A0 6RD
104 40A A1 12RD A0 6RD
105 40A (DIESEL) A17 12RD/BK A0 6RD
106 40A A16 12GY A0 6RD
107 40A INTERNAL A0 6RD
108 40A A4 12BK/RD A0 6RD
109 30A INTERNAL A0 6RD
A/C COMPRESSOR CLUTCH RELAYCAV CIRCUIT FUNCTION
30 INTERNAL FUSED B(+)
85 C13 18DB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL (GAS)
85 C13 20DB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL (DIESEL)
86 F87 18WT/BK FUSED IGNITION SWITCH OUTPUT (ST-RUN) (GAS)
86 A142 18DG/OR DIESEL POWER RELAY OUTPUT (DIESEL)
87 C3 18DB/BK A/C COMPRESSOR CLUTCH RELAY OUTPUT
87A --
AUTOMATIC SHUT DOWN RELAY (GAS)CAV CIRCUIT FUNCTION
30 INTERNAL FUSED B(+)
85 K51 18DB/YL AUTOMATIC SHUT DOWN RELAY CONTROL
86 A0 6RD B(+)
87 A142 18DG/OR AUTOMATIC SHUT DOWN RELAY OUTPUT
87A --
CIGAR LIGHTER/ACCESSORY RELAYCAV CIRCUIT FUNCTION
30 INTERNAL FUSED B(+)
85 Z1 18BK GROUND
86 F1 20DB FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
87 F30 16RD CIGAR LIGHTER/ACCESSORY RELAY OUTPUT
87A --
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CONNECTOR PINOUTS
ProCarManuals.com