Nissan Sentra B18 (2020-2025) Service Manual: Torque Converter Clutch Solenoid Circuit
Diagnosis Procedure
-
CHECK HARNESS CONNECTOR
-
Ignition switch OFF.
-
Check the mating condition of TCM harness connector and CVT unit harness connector.
Is the inspection result normal?
YES >>GO TO 2.
NO >>Repair or replace damaged parts.
-
-
CHECK CONNECTOR TERMINAL
-
Disconnect TCM harness connector and CVT unit harness connector.
-
Check the connectors of TCM and CVT unit for water intrusion, or damage or corrosion of the terminals.
Is the inspection result normal?
YES >>GO TO 3.
NO >>Repair or replace damaged parts.
-
-
CHECK DETECTED DTC
Are other solenoid valve malfunctions detected in addition to torque converter clutch solenoid?
YES >>GO TO 4.
NO >>GO TO 7.
-
CHECK SENSOR GROUND CIRCUIT - 1
-
Connect TCM harness connector.
-
Check continuity (resistance) between CVT unit harness connector terminal and ground.
CVT unit
—
Continuity (Resistance)
Connector
Terminal
F46
20
Ground
Existed (1 Ω or less)
Is the inspection result normal?
YES >>GO TO 6.
NO >>GO TO 5.
-
-
CHECK SENSOR GROUND CIRCUIT - 2
-
Disconnect TCM harness connector.
-
Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.
TCM
CVT unit
Continuity (Resistance)
Connector
Terminal
Connector
Terminal
F23
44
F46
20
Existed (1 Ω or less)
Is the inspection result normal?
YES >>GO TO 6.
NO >>Repair harness or connector.
-
-
CHECK TCM POWER SUPPLY AND GROUND CIRCUITS
Check TCM power supply and ground circuits. Refer to Diagnosis Procedure.
Is the inspection result normal?
YES >>INSPECTION END
NO >>Repair or replace damaged parts.
-
CHECK TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT - 1
Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.
TCM
CVT unit
Continuity (Resistance)
Connector
Terminal
Connector
Terminal
F23
38
F46
5
Existed (1 Ω or less)
Is the inspection result normal?
YES >>GO TO 8.
NO >>Repair harness or connector.
-
CHECK TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT - 2
Check continuity between TCM harness connector terminal and ground.
TCM
−
Continuity
Connector
Terminal
F23
38
Ground
Not existed
Is the inspection result normal?
YES >>GO TO 9.
NO >>Repair harness.
-
CHECK TORQUE CONVERTER CLUTCH SOLENOID
Check resistance between CVT unit connector terminals.
CVT unit
Test condition
Resistance
Terminal
5
20
CVT fluid temperature
20°C (68°F)
5.5 – 7.0 Ω
50°C (122°F)
6.0 – 8.0 Ω
80°C (176°F)
6.5 – 8.5 Ω
Is the inspection result normal?
YES >>INSPECTION END
NO >>Replace control valve due to torque converter clutch solenoid malfunction. Refer to Removal and Installation.
Select Solenoid Valve Circuit
Diagnosis Procedure
Diagnosis Procedure
CHECK HARNESS CONNECTOR
Ignition switch OFF.
Check the mating condition of TCM
...
Shift Position Indicator Circuit
Component Parts Function Inspection
Component Parts Function Inspection
CHECK SHIFT POSITION INDICATOR
Start the engine.
Shift se ...
Other materials:
Fuel Tank Temperature Sensor
Component Inspection
Component Inspection
CHECK FUEL TANK TEMPERATURE (FTT)
SENSOR
Turn ignition switch OFF.
Disconnect fuel level sensor unit and
fuel pump harness connector.
Remov ...
Precaution for Harness Repair
Precaution for Harness Repair
AV COMMUNICATION SYSTEM
Solder the repaired parts, and wrap with tape.
[Frays of twisted line must be within 110 mm (4.33 in).]
Do not perform bypass wire connections for the
repair parts. (The spliced wire will bec ...
B2fac-14 Accessory Relay
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen items
(Trouble diagnosis content)
DTC detection condition
...
