Dtc Description

DTC Description

The Signal Tech II Tool [– (NI-50190)] can be used to perform the following functions: Refer to the Signal Tech II User Guide for additional information.

• Activate and display TPMS sensor IDs

• Display tire pressure reported by the TPMS sensor

• Read TPMS DTCs

• Register TPMS sensor IDs

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1731-68	Tire pressure sensor FL (Tire pressure sensor front left)	1	Diagnosis condition	Drive the Nissan Sentra vehicle at 25 MPH (40 km/h) or more. Note: When DTC is memorized, DTC is displayed again at ignition switch ON.
			Signal (terminal)	Temperature data signal.
			Threshold	Malfunction in the tire pressure data from the front left tire pressure sensor.
			Diagnosis delay time	1 second or less.
		2	Diagnosis condition	Drive the Nissan Sentra vehicle at 25 MPH (40 km/h) or more. Note: When DTC is memorized, DTC is displayed again at ignition switch ON.
			Signal (terminal)	Temperature data signal.
			Threshold	Malfunction in the tire temperature data from the front left tire pressure sensor.
			Diagnosis delay time	1 second or less.
		3	Diagnosis condition	Drive the Nissan Sentra vehicle at 25 MPH (40 km/h) or more. Note: When DTC is memorized, DTC is displayed again at ignition switch ON.
			Signal (terminal)	Temperature data signal.
			Threshold	Malfunction in the G sensor data from front left tire pressure sensor.
			Diagnosis delay time	1 second or less.

POSSIBLE CAUSE

Front left tire pressure sensor

FAIL-SAFE

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Dtc Confirmation Procedure

DTC Confirmation Procedure

1. PERFORM SELF DIAGNOSTIC RESULT

   1. CONSULT

      1. Ignition switch ON.

         CAUTION:

         Never start the engine.

      2. Check tire pressure for all wheels and adjust to the specified value. Refer to Tire Air Pressure.

      3. Select “Self Diagnostic Result” mode of “BCM(AIR PRESSURE MONITOR)”.

   Is DTC “C1731-68” 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

The Signal Tech II Tool [– (NI-50190)] can be used to perform the following functions: Refer to the Signal Tech II User Guide for additional information.

• Activate and display TPMS sensor IDs

• Display tire pressure reported by the TPMS sensor

• Read TPMS DTCs

• Register TPMS sensor IDs

1. PERFORM SELF DIAGNOSTIC RESULT

   1. CONSULT

      Replace front left tire pressure sensor even if other DTCs are displayed along with “C1731-68” in "Self Diagnostic Result" mode of “BCM(AIR PRESSURE MONITOR)”.

   >>

   Replace front left tire pressure sensor. Refer to Removal and Installation.