Nissan Sentra B18 (2020-2025) Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f15a / Dtc/circuit Diagnosis / Transmission Range Switch Circuit

Nissan Sentra B18 (2020-2025) Service Manual: Transmission Range Switch Circuit

Diagnosis Procedure

Diagnosis Procedure

CHECK HARNESS CONNECTOR
1. Ignition switch OFF.
2. 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
1. Disconnect TCM harness connector and CVT unit harness connector.
2. 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 sensor malfunctions detected in addition to transmission range switch?
YES >>
GO TO 4.
NO >>
GO TO 5.

CHECK SENSOR GROUND CIRCUIT

Check continuity (resistance) between CVT unit harness connector terminal and ground.

TCM		CVT unit		Continuity (Resistance)
Connector	Terminal	Connector	Terminal	Continuity (Resistance)
F23	15	F46	18	Existed (1 Ω or less)

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

Repair harness or connector.

CHECK TRANSMISSION RANGE SWITCH - 1

Check resistance between CVT unit connector terminals.

Transmission range switch	CVT unit		Test condition	Resistance
Transmission range switch	Terminal		Test condition	Resistance
Switch 1	6	18	Selector lever: “R”, “N” or “D” position	0 - 2.3 Ω
Switch 1	6		Other than the above	3.7 - 4.1 kΩ
Switch 2	7		Selector lever: “N”, “D” or “L” position	0 - 2.3 Ω
Switch 2	7		Other than the above	3.7 - 4.1 kΩ
Switch 3	8		Selector lever: “D” or “L” position	0 - 2.3 Ω
Switch 3	8		Other than the above	3.7 - 4.1 kΩ
Switch 4	9		Selector lever: “R” or “D” position	0 - 2.3 Ω
Switch 4	9		Other than the above	3.7 - 4.1 kΩ

Is the inspection result normal?

YES >>

GO TO 8.

NO >>

GO TO 6.

ADJUSTMENT OF CONTROL CABLE

Adjust the control cable installation. Refer to Adjustment.

>>
GO TO 7.

CHECK TRANSMISSION RANGE SWITCH - 2

Check resistance between CVT unit connector terminals.

Transmission range switch	CVT unit		Test condition	Resistance
Transmission range switch	Terminal		Test condition	Resistance
Switch 1	6	18	Selector lever: “R”, “N” or “D” position	0 - 2.3 Ω
Switch 1	6		Other than the above	3.7 - 4.1 kΩ
Switch 2	7		Selector lever: “N”, “D” or “L” position	0 - 2.3 Ω
Switch 2	7		Other than the above	3.7 - 4.1 kΩ
Switch 3	8		Selector lever: “D” or “L” position	0 - 2.3 Ω
Switch 3	8		Other than the above	3.7 - 4.1 kΩ
Switch 4	9		Selector lever: “R” or “D” position	0 - 2.3 Ω
Switch 4	9		Other than the above	3.7 - 4.1 kΩ

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

Replace control valve due to transmission range switch malfunction. Refer to Removal and Installation.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

Connect TCM harness connector.
Ignition switch ON.

Check voltage between CVT unit harness connector terminals and ground.

Transmission range switch	+		−	Voltage (Approx.)
	CVT unit
	Connector	Terminal
Switch 1	F46	6	Ground	5 V
Switch 2		7
Switch 3		8
Switch 4		9

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

GO TO 9.

CHECK TRANSMISSION RANGE SWITCH CIRCUIT (POWER SUPLLY CIRCUIT) - 1

Ignition switch OFF.
Disconnect TCM harness connector.

Check continuity (resistance) between TCM harness connector terminals and CVT unit harness connector terminals.

Transmission range switch	TCM		CVT unit		Continuity (Resistance)
Transmission range switch	Connector	Terminal	Connector	Terminal	Continuity (Resistance)
Switch 1	F23	4	F46	6	Existed (1 Ω or less)
Switch 2		5		7
Switch 3		6		8
Switch 4		7		9

Is the inspection result normal?

YES >>

GO TO 10.

NO >>

Repair harness or connector.

CHECK TRANSMISSION RANGE SWITCH CIRCUIT (POWER SUPLLY CIRCUIT) - 2

Check continuity between TCM harness connector terminals and ground.

Transmission range switch	TCM		−	Continuity
Transmission range switch	Connector	Terminal	−	Continuity
Switch 1	F23	4	Ground	Not existed
Switch 2		5
Switch 3		6
Switch 4		7

Is the inspection result normal?

YES >>

GO TO 11.

NO >>

Repair harness.

CHECK TRANSMISSION RANGE SWITCH CIRCUIT (POWER SUPLLY CIRCUIT) - 3

Ignition switch ON.

Check voltage between TCM harness connector terminals and ground.

Transmission range switch	+		−	Voltage (Approx.)
	TCM
	Connector	Terminal
Switch 1	F23	4	Ground	0 V
Switch 2		5
Switch 3		6
Switch 4		7

Is the inspection result normal?

YES >>

GO TO 12.

NO >>

Repair harness.

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.

 Main Power Supply and Ground Circuit

Diagnosis Procedure Diagnosis Procedure CHECK TCM POWER CIRCUIT - 1 Ignition switch OFF. Disconnect TCM harness connector. Check voltage between TCM harness connector terminals ...

 Cvt Fluid Temperature Sensor Circuit

Diagnosis Procedure Diagnosis Procedure CHECK HARNESS CONNECTOR - 1 Ignition switch OFF. Check the mating condition of TCM harness connector and CVT unit harness connector. Is t...

Other materials:

B132a External Usb
Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detection condition ...

Storage
Front-door pockets Front door pockets The Nissan Sentra front-door pockets provide convenient storage for small personal items such as documents, water bottles, or everyday accessories, keeping the cabin organized and items within easy reach of the driver and front passenger. Seatback po ...

P1212 Tcs Communication Line
Dtc Description DTC Description This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse signals are exchanged between ECM and “ABS actuator and electric unit (control unit)”. Be sure to erase the ma ...