Nissan Sentra B18 (2020-2025) Service Manual: Line Pressure Solenoid Valve Circuit
Diagnosis Procedure
Diagnosis Procedure
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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 line pressure solenoid valve?
YES >>GO TO 4.
NO >>GO TO 7.
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CHECK SOLENOID 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
19
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
43
F46
19
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 LINE PRESSURE SOLENOID VALVE 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
30
F46
1
Existed (1 Ω or less)
Is the inspection result normal?
YES >>GO TO 8.
NO >>Repair harness or connector.
-
CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT - 2
Check continuity between TCM harness connector terminal and ground.
TCM
−
Continuity
Connector
Terminal
F23
30
Ground
Not existed
Is the inspection result normal?
YES >>GO TO 9.
NO >>Repair harness.
-
CHECK LINE PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminals.
CVT unit
Test condition
Resistance
Terminal
1
19
CVT fluid temperature
20°C (68°F)
5.0 – 5.6 Ω
50°C (122°F)
5.5 – 6.8 Ω
80°C (176°F)
6.0 – 8.0 Ω
Is the inspection result normal?
YES >>INSPECTION END
NO >>Replace control valve due to line pressure solenoid valve malfunction. Refer to Removal and Installation.
Other materials:
Action Test
Ldw
Work Procedure
Work Procedure
Perform action test to verify the customer's
concern.
Perform action test and check the system operation after
system diagnosis.
Warning:
Be careful of traffic conditions and safety around the
...
Flash Code Index
Flash Code Index
WARNING LAMP FLASH CODE CHART
How to read flash codes
Put the Nissan Sentra vehicle in Diagnosis Mode. Refer to Trouble Diagnosis without CONSULT.
All codes are proceeded by a seven second ”holding”
flash.
Identify how ma ...
Abbreviations. Abbreviation List
Abbreviation List
Abbreviation
List
The following ABBREVIATIONS are
used:
A
ABBREVIATION
DESCRIPTION
A/C
Air conditione ...