DTC B2290

DTC B2290 DETECTION CONDITION AND POSSIBLE CAUSES

DTC B2290	Passenger sensing system malfunction
DETECTION CONDITION	WARNING: Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. Passenger sensing system circuit malfunction
POSSIBLE CAUSE	Seat weight sensor calibration not properly set Communication error between SAS control module and seat weight sensor control module Seat weight sensor control module internal malfunction LH or RH seat weight sensor malfunction

DTC B2290 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT SEAT WEIGHT SENSOR CONTROL MODULE CONNECTOR WARNING: Handling the air bag system components improperly can accidentally operate (deploy) the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components. (See SERVICE WARNINGS. ) (See SERVICE CAUTIONS. ) Turn the ignition switch to the LOCK position. Disconnect the negative battery cable and wait for 1 min or more. Disconnect the seat weight sensor control module connector. Is there any malfunction of the seat weight sensor control module connector?	Yes	Repair or replace the wiring harness. After replacement, repeat the DTC inspection and verify that no DTCs are displayed.
1		No	Go to the next step.
2	INSPECTION WIRING HARNESS Disconnect the SAS control module connector. Verify continuity in the following wiring harnesses: Between SAS control module terminal 11 and seat weight sensor control module terminal 3D Between the battery and seat weight sensor control module terminal 3A Between seat weight sensor control module terminal 3B and body ground Is the continuity normal?	Yes	Go to the next step.
2		No	If there is any malfunction in the wiring harnesses, repair or replace the applicable wiring harness. After replacement, repeat the DTC inspection and verify that no DTCs are displayed.
3	INSPECT PASSENGER SENSING SYSTEM Connect the seat weight sensor control module connector. Connect the SAS control module. Connect the negative battery cable. Verify the following PIDs using the M-MDS. (See PID/DATA MONITOR TABLE ). OCSFLT_MDL OCFLT_COM OCSFLT_L OCFLT_R OCSFLT_SNS OCSFLT_CAL Do all PIDs display "OK"?	Yes	Go to the next step.
3		No	Replace the following parts according to the M-MDS screen: OCSFLT_MDL or OCSFLT_COM If FAULT is displayed: Seat weight sensor control module (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [EXCEPT L3 WITH TC]. ) (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [L3 WITH TC]. ) OCSFLT_L If FAULT is displayed: Seat weight sensor (LH) (See FRONT SEAT DISASSEMBLY/ASSEMBLY [EXCEPT L3 WITH TC]. ) (See FRONT SEAT DISASSEMBLY/ASSEMBLY [L3 WITH TC]. ) OCSFLT_R If FAULT is displayed: Seat weight sensor (RH) (See FRONT SEAT DISASSEMBLY/ASSEMBLY [EXCEPT L3 WITH TC]. ) (See FRONT SEAT DISASSEMBLY/ASSEMBLY [L3 WITH TC]. ) OCSFLT_SNS If FAULT is displayed: Seat weight sensor (See FRONT SEAT DISASSEMBLY/ASSEMBLY [EXCEPT L3 WITH TC]. ) (See FRONT SEAT DISASSEMBLY/ASSEMBLY [L3 WITH TC]. ) OCSFLT_CAL If FAULT is displayed: Perform seat weight sensor calibration (See SEAT WEIGHT SENSOR CALIBRATION. )
4	INSPECT SAS CONTROL MODULE Repeat the DTC inspection. Is DTC B2290 indicated?	Yes	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION. )
4		No	DTC troubleshooting completed.