Nissan Sentra B18 (2020-2025) Service Manual: B1040-22 Vehicle Speed

Nissan Sentra B18 (2020-2025) Service Manual / Restraints / Srs Air Bag Control System :: Dtc/circuit Diagnosis / Air Bag (air Bag Diagnosis Sensor Unit) / B1040-22 Vehicle Speed

Dtc Description

DTC Description

DTC DETECTION LOGIC

Note:

This DTC may be detected when drive the Nissan Sentra vehicle at vehicle speed of 186 MPH (300 km/h) or more.

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B1040-22	Nissan Sentra Vehicle speed (Vehicle speed)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Nissan Sentra Vehicle speed signal
		Threshold	186 MPH (300 km/h) or more
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Drive the Nissan Sentra vehicle at vehicle speed of 186 MPH (300 km/h) or more.
ECM
Air bag diagnosis sensor unit

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

CCHECK SELF DIAGNOSTIC RESULT
1. CONSULT
  1. Ignition switch ON.
  2. Select “Self Diagnostic Result” mode of “AIR BAG”.
  3. Check for DTC.
Is malfunctioning part 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

Warning:

Before servicing, ignition switch OFF, disconnect battery negative terminal, and wait at least 3 minutes or more (to discharge backup capacitor).

Never use an unspecified tester or other measuring device.

REPLACE ECM
1. 1. Replace ECM. Refer to Removal and Installation.
  2. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.
Is DTC detected?
YES>>
Replace air bag diagnosis sensor unit. Refer to Removal and Installation.
NO>>
Inspection End.

B1041-82 Vehicle Speed Signal

Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen items (Tro ...

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