Nissan Sentra B18 (2020-2025) Service Manual: B2f73-23 Clutch Switch

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2F73-23	Clutch switch (Clutch switch)	Diagnosis condition	Driving distance of 20 km or more after starting the engine
		Signal (terminal)	Clutch master cylinder (clutch switch) signal
		Threshold	BCM detects that the Clutch master cylinder (clutch switch) signal is OFF input even though the clutch pedal is not depressed.
		Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connector

  (Clutch master cylinder (clutch switch) circuit is open or shorted)

• Clutch master cylinder (clutch switch)

• BCM

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE

   1. CONSULT

      1. Start the engine.

      2. Drive the Nissan Sentra vehicle more than 12 miles (20 km).

      3. Select “Self Diagnostic Result” mode of “BCM”.

   Is DTC detected?

   YES >>

   Refer to DTC Diagnosis Procedure.

   NO >>

   To check malfunction symptom before repair: Refer to Intermittent Incident.

   NO >>

   Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK FUSE

   1. Check that the following fuse is not blown (open):

      Signal name	Fuse No.	Capacity
      Ignition power supply	5	5 A

   Is the fuse blown (open)?

   YES >>

   Replace the blown (open) fuse after repairing the cause of blown (open).

   NO >>

   GO TO 2.

2. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) SIGNAL

   1. 1. Ignition switch OFF.

      2. Disconnect BCM connector.

      3. Ignition switch ON.

      4. Check voltage between BCM harness connector and ground.

         (+)		(–)	Condition		Voltage (Approx.)
         BCM
         Connector	Terminal
         M142	113	Ground	Clutch pedal is not depressed		Battery voltage
         			Clutch pedal is depressed		0 V

   Is the inspection result normal?

   YES >>

   Replace BCM. Refer to Removal and Installation.

   NO >>

   GO TO 3.

3. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) POWER SUPPLY

   1. 1. Ignition switch OFF.

      2. Disconnect clutch master cylinder (clutch switch) connector.

      3. Ignition switch ON.

      4. Check voltage between clutch master cylinder (clutch switch) harness connector and ground.

         (+)		(–)	Voltage (Approx.)
         Clutch master cylinder (clutch switch)
         Connector	Terminal
         E32	8	Ground	Battery voltage

   Is the inspection result normal?

   YES>>

   GO TO 4.

   NO>>

   Repair or replace harness.

4. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) CIRCUIT

   1. 1. Ignition switch OFF.

      2. Check continuity between clutch master cylinder (clutch switch) harness connector and BCM harness connector.

         Clutch master cylinder (clutch switch)		BCM		Continuity
         Connector	Terminal	Connector	Terminal
         E32	5	M142	113	Yes

      3. Check continuity between clutch master cylinder (clutch switch) harness connector and ground.

         Clutch master cylinder (clutch switch)		—	Continuity
         Connector	Terminal
         E32	5	Ground	No

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Repair or replace harness.

5. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) GROUND CIRCUIT

   1. Check continuity between clutch master cylinder (clutch switch) harness connector and ground.

      Clutch master cylinder (clutch switch)		—	Continuity
      Connector	Terminal
      E32	7	Ground	Yes

   Is the inspection result normal?

   YES >>

   Replace clutch master cylinder (clutch switch). Refer to Removal and Installation.

   NO >>

   Repair or replace harness.