Nissan Sentra B18 (2020-2025) Service Manual: Primary 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 primary pressure solenoid valve?
YES >>GO TO 4.
NO >>GO TO 7.
-
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 PRIMARY 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
40
F46
2
Existed (1 Ω or less)
Is the inspection result normal?
YES >>GO TO 8.
NO >>Repair harness or connector.
-
CHECK PRIMARY PRESSURE SOLENOID VALVE CIRCUIT - 2
Check continuity between TCM harness connector terminal and ground.
TCM
−
Continuity
Connector
Terminal
F23
40
Ground
Not existed
Is the inspection result normal?
YES >>GO TO 9.
NO >>Repair harness.
-
CHECK PRIMARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminals.
CVT unit
Test condition
Resistance
Terminal
2
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 primary pressure solenoid valve malfunction. Refer to Removal and Installation.
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