Nissan Sentra B18 (2020-2025) Service Manual: C1f03-23 Operation Sw Circ

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1F03	23	CONTROL UNIT (Control unit)	Diagnosis condition	When engine is running When ICC MAIN switch is ON
			Signal (terminal)	—
			Threshold	Any switch of the ICC steering switch is detected as “ON”
			Diagnosis delay time	Continuously 60 seconds

POSSIBLE CAUSE

• ICC steering switch circuit

• ICC steering switch

• ECM

FAIL-SAFE

The following systems are canceled.

• Nissan Sentra Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

Confirmation Procedure

Confirmation Procedure

DTC CONFIRMATION PROCEDURE

1. CHECK DTC PRIORITY

   If DTC “C1F03-23” is displayed with Network-DTC, first diagnose the Network-DTC.

   Is applicable DTC detected?

   YES >>

   Perform diagnosis of applicable. DTC Index

   NO >>

   GO TO 2 .

2. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start the engine.

   2. Wait for approximately 5 minutes after turning the ICC MAIN switch ON.

   3. Perform “All DTC Reading” with CONSULT.

   4. Check if the “C1F03-23” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

   Is “C1F03-23” detected as the current malfunction?

   YES >>

   DTC Diagnosis Procedure

   NO-1 >>

   To check malfunction symptom before repair: Intermittent Incident

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK DTC PRIORITY

   If DTC “C1F03-23” is displayed with Network-DTC, first diagnose the Network-DTC.

   Is applicable DTC detected?

   YES >>

   Perform diagnosis of applicable. DTC Index

   NO >>

   GO TO 2 .

2. CHECK ICC STEERING SWITCH

   1. Turn the ignition switch OFF.

   2. Disconnect the ICC steering switch connector.

   3. Check the ICC steering switch. Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Replace the ICC steering switch.

3. CHECK HARNESS BETWEEN SPIRAL CABLE AND ECM

   1. Disconnect the ECM connector.

   2. Check for continuity between the spiral cable harness connector and ECM harness connector.

      Spiral cable		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      M30	8	E16	144	Existed
      	1		145

   3. Check for continuity between spiral cable harness connector and ground.

      Spiral cable		Ground	Continuity
      Connector	Terminal
      M30	8		Not existed
      	1

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Repair the harnesses or connectors.

4. CHECK SPIRAL CABLE

   Check for continuity between spiral cable terminals.

   Spiral cable		Continuity
   Terminal
   21	8	Existed
   36	1

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Replace the spiral cable.

5. PERFORM SELF-DIAGNOSIS OF ECM

   1. Connect the connectors of ICC steering switch and ECM connector.

   2. Turn the ignition switch ON.

   3. Perform “All DTC Reading”.

   4. Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”.

   Is any DTC detected?

   YES >>

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

   NO >>

   Replace the ADAS control unit 2. Removal and Installation

Component Inspection

Component Inspection

1. CHECK ICC STEERING SWITCH

   Check resistance between ICC steering switch terminals.

   

   Terminal		Switch operation	Resistance [Ω]
   21	36	When pressing MAIN switch	Approx. 0
   		When pressing CANCEL switch	Approx. 309
   		When pressing DISTANCE switch	Approx. 741
   		When pressing SET­ switch	Approx. 1406
   		When pressing RES+ switch	Approx. 2586
   		When all switches are not pressed	Approx. 5456

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace the ICC steering switch.