Nissan Sentra B18 (2020-2025) Service Manual: C1f00-49 Control Unit

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1F00	49	CONTROL UNIT (Control unit)	1	Diagnosis condition	When engine is running
				Signal (terminal)	—
				Threshold	ADAS control unit 2 internal malfunction
				Diagnosis delay time	1 second or less
			2	Diagnosis condition	When engine is running
				Signal (terminal)	—
				Threshold	Steering vibration motor has a malfunction
				Diagnosis delay time	1 second or less

POSSIBLE CAUSE

ADAS control unit 2

Steering vibration motor

FAIL-SAFE

The following systems are canceled.

• Nissan Sentra Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

• AEB

• LDW

• TSR

• BSW

• I-DA

• RCTA

• I-FCW

• RAB

Confirmation Procedure

Confirmation Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start the engine.

   2. Perform “All DTC Reading” with CONSULT.

   3. Check if the “C1F00-49” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

   Is “C1F00-49” detected as the current malfunction?

   YES >>

   Refer to DTC Diagnosis Procedure.

   NO-1 >>

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

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK STEERING VIBRATION MOTOR CIRCUIT

   1. Turn the ignition switch ON.

   2. Select the active test item “Vibration motor” of “ICC/ADAS 2” with CONSULT.

   3. With operating the test item, check the operation.

      On	: Steering vibration motor is activated.
      Off	: Steering vibration motor is not activated.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   GO TO 2 .

2. CHECK HARNESS BETWEEN SPIRAL CABLE AND ADAS CONTROL UNIT 2

   1. Turn ignition switch OFF.

   2. Disconnect the spiral cable connector.

   3. Disconnect the ADAS control unit 2 connector.

   4. Check continuity between the spiral cable harness connector and ADAS control unit 2 harness connector.

      Spiral cable		ADAS control unit 2		Continuity
      Connector	Terminal	Connector	Terminal
      M30	2	M148	12	Existed
      	3		24

   5. Check continuity between the spiral cable harness connector and ground.

      Spiral cable		Ground	Continuity
      Connector	Terminal
      M30	2		Not existed
      	3

   Is the inspection result normal?

   YES >>

   GO TO 3 .

   NO >>

   Repair the harnesses or connectors.

3. CHECK SPIRAL CABLE

   Check for continuity between the spiral cable terminals.

   Spiral cable		Continuity
   Terminal
   2	35	Existed
   3	34

   Is the inspection result normal?

   YES >>

   GO TO 4 .

   NO >>

   Replace spiral cable.

4. CHECK STEERING VIBRATION MOTOR SIGNAL

   1. Connect the all connectors.

   2. Turn ignition switch ON.

   3. Select the active test of “ICC/ADAS 2” with CONSULT.

   4. Check voltage between the ADAS control unit 2 harness connector and ground.

      ADAS control unit 2			Condition	Voltage (Approx.)
      Connector	Terminal
      	+	-
      M148	12	Ground	At “Vibration motor” test of “Active test”	12 V

   Is the inspection result normal?

   YES >>

   Replace the steering vibration motor. Refer to Removal and Installation.

   NO >>

   GO TO 5 .

5. CHECK SELF-DIAGNOSIS RESULTS

   Check if any DTC other than “C1F00-49” is detected in “Self Diagnostic Result” of “ICC/ADAS 2”.

   Is any DTC detected?

   YES >>

   Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. DTC Index

   NO >>

   Replace the ADAS control unit 2. Removal and Installation