Dodge Dakota (R1). Manual — part 887
Symptom:
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY
CIRCUITS
When Monitored and Set Condition:
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS
When Monitored:
Continuously with the key on.
Set Condition:
This code will set if the voltage detected on the Torque Converter Clutch
Solenoid Control circuit at the PCM is different than the expected voltage.
POSSIBLE CAUSES
P1765 DTC PRESENT
INTERMITTENT - TCC SOLENOID CONTROL CIRCUIT
TRANSMISSION CONTROL RELAY OUTPUT
TCC SOLENOID CONTROL CIRCUIT OPEN
TCC SOLENOID CONTROL CIRCUIT OPEN INTERNAL
FUSED B+ CIRCUIT OPEN
TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND INTERNAL
TRANSMISSION RELAY OUTPUT CIRCUIT SHORT TO GROUND
TCC SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
TCC SOLENOID CONTROL CIRCUIT SHORT TO SOLENOID CIRCUITS INTERNAL
TCC SOLENOID CONTROL CIRCUIT SHORTED TO OTHER CIRCUITS
TCC SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS INTERNAL
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
TRANSMISSION CONTROL RELAY - POOR CONTACTS
PCM - TCC SOLENOID CONTROL CIRCUIT
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
With the DRBIII
t, read DTCs.
Is the Good Trip Counter for P0743 displayed and equal to 0?
All
Yes
→
No
→
280
TRANSMISSION
TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, read Transmission DTCs.
Is the DTC P1765 present?
All
Yes
→
Perform diagnostics on P1765 TRANS 12 VOLT SUPPLY RELAY
CTRL CIRCUIT first before proceeding.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
3
With the DRBIII
t, read Transmission DTCs.
Are DTCs, P0743, P0748 and P0753 present?
All
Yes
→
No
→
4
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the Fused Transmission Control
Relay Output circuit in the Transmission Solenoid Assembly harness connector.
Does the test light illuminate brightly?
All
Yes
→
Replace the Transmission Solenoid Assembly in accordance with
the Service Information.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
5
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the Fused B+ circuit in the
Transmission Control Relay connector.
NOTE: The light must illuminate brightly. Compare the brightness to being
connected directly to the battery.
Does the test light illuminate brightly?
All
Yes
→
No
→
Repair the Fused B+ circuit for an open. If the fuse is open make
sure to check for a short to ground or excessive resistance in the
Fused B+ circuit and repair as necessary.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
6
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Remove the Transmission Control Relay.
Measure the resistance between ground and the Fused Transmission Relay Control
Output circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Transmission Relay Output circuit for a short to
ground.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
281
TRANSMISSION
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIR-
CUITS —
Continued
TEST
ACTION
APPLICABILITY
7
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Check connectors - Clean/repair as necessary
Ignition on, engine not running.
Connect a jumper wire between the Fused Transmission Relay Output circuit and the
Fused B+ in the Transmission Relay connector.
Using a 12-volt test light connected to ground, check the Fused Transmission Relay
Control Output circuit in the Transmission Solenoid Assembly harness connector.
NOTE: The light must illuminate brightly. Compare the brightness to being
connected directly to the battery.
Does the test light illuminate brightly?
All
Yes
→
No
→
Repair the Fused Transmission Control Relay Output circuit for
an open. If the fuse is open make sure to check for a short to
ground or excessive resistance in the Fused Transmission Relay
Output circuit and repair as necessary.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
8
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Check connectors - Clean/repair as necessary
Ignition on, engine not running.
Connect a jumper wire between the Fused Transmission Relay Output circuit and the
Fused B+ in the Transmission Relay connector.
Using a 12-volt test light connected to ground, check the Transmission Relay Control
Output circuit in the Fused Transmission Solenoid Assembly harness connector.
Does the test light illuminate brightly?
All
Yes
→
Replace the Transmission Control Relay.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
Test Complete.
9
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connectors.
Disconnect the PCM harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the TCC Solenoid Control circuit between the Transmis-
sion Solenoid Assembly harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the TCC Solenoid Control circuit for an open.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
10
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between ground and the TCC Solenoid Control circuit in the
PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the TCC Solenoid Control circuit for a short to ground.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
282
TRANSMISSION
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIR-
CUITS —
Continued
TEST
ACTION
APPLICABILITY
11
Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Disconnect the Transmission Solenoid Assembly harness connector.
Ignition on, engine not running.
Measure the voltage of the TCC Solenoid Control circuit.
Is the voltage above 0.5 volt?
All
Yes
→
Repair the TCC Solenoid Control circuit for a short to voltage.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
12
Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Disconnect the Transmission Solenoid Assembly harness connector.
Remove the Transmission Control Relay.
Check connectors - Clean/repair as necessary
Measure the resistance between the TCC Solenoid Control circuit and all other
circuits in the Transmission Solenoid Assembly harness connector.
Is the resistance between the TCC Solenoid Control circuit and any other circuit
below 100 kohms?
All
Yes
→
Repair as necessary.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
13
Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Remove the Transmission Control Relay.
Measure the resistance of the TCC Solenoid Control circuit between the PCM
harness connector and the Fused Transmission Control Relay Output circuit connec-
tor.
Is the resistance between 25.0 ohms and 60.0 ohms
All
Yes
→
No
→
Replace the Transmission Solenoid Assembly in accordance with
the Service Information.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
14
Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between the TCC Solenoid Control circuit and ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair or Replace the Transmission Solenoid Assembly for a short
to ground.
Perform TRANSMISSION VERIFICATION TEST VER - 1.
No
→
283
TRANSMISSION
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIR-
CUITS —
Continued
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