Nissan GT-R (R35) · Service Manual RESTRAINTS

B1022 OCCUPANT SENS C/U

B1022

Description


Suppresses the deployment of front passenger air bag when the condition of passenger seat is empty or child and child-seat. And turns on front passenger air bag OFF indicator lamp when the condition of passenger seat is child-seat and child. In case of malfunction the blinking of the air bag warning lamp reports the malfunction to driver and by the on board self-diagnosis system or electro-diagnosis tester CONSULT-III can detect the cause.
 
 OPERATION

This unit classifies occupant in passenger seat and detects electrical malfunction in Occupant Classification System and transmits malfunction information to air bag control unit.
 
 STRUCTURE

It is integrated into the seat sensor mat and detects the occupants and Occupant Classification System control unit that classifies the occupants.
 
 INSTALLATION

Occupant Classification System control unit is installed in the passenger seat cushion.

DTC Logic

 
 DTC DETECTION LOGIC

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
B1022
 		OCCUPANT SENS C/U
[COMM FAIL]
 		Trouble occurs in Occupant Classification System control unit, circuit of Occupant Classification System control unit-Air bag diagnosis sensor unit or Air bag diagnosis sensor unit
  • Disconnection of wiring harness
  • Malfunction in Occupant Classification System control unit
  • Malfunction in air bag diagnosis sensor unit

 
 DTC CONFIRMATION PROCEDURE

 
 1.CHECK SELF-DIAG RESULT

Diagnosis Procedure


■ WARNING ■
  • Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3 minutes. (To discharge backup capacitor.)
  • Do not use unspecified tester or other measuring device.

 
 DIAGNOSTIC PROCEDURE

 
 1.CHECK HARNESS CONNECTOR
 
 2.CHECK WIRING HARNESS
 
 3.CHECK OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
 
 4.CHECK AIR BAG DIAGNOSIS SENSOR UNIT