DTC B104D, B2226, B2227, B2855

id080200811000

DTC

B104D

Crash zone sensor and other sensor circuits short to power supply

B2226

Crash zone sensor (internal circuit abnormal)

B2227

Crash zone sensor (communication error)

B2855

Crash zone sensor circuit short
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.
•  Malfunction in wiring harness between crash zone sensor and SAS control module
•  Malfunction in crash zone sensor circuit
POSSIBLE CAUSE
•  Open or short circuit in wiring harness between crash zone sensor and SAS control module
•  Crash zone sensor malfunction
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT CRASH ZONE SENSOR CONNECTOR
Warning
•  Handling the air bag system components improperly can accidentally 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.
•  Turn the ignition switch to the OFF position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the crash zone sensor connector. (See CRASH ZONE SENSOR REMOVAL/INSTALLATION.)
•  Is there any malfunction of the crash zone sensor connector?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN CRASH ZONE SENSOR AND SAS CONTROL MODULE
•  Turn the ignition switch to the OFF position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.)
•  Disconnect the clock spring connector. (See COMBINATION SWITCH REMOVAL/INSTALLATION.)
•  Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)
•  Disconnect the passenger-side air bag module connector. (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
•  Disconnect the driver and passenger-side front seat connectors. (See FRONT SEAT REMOVAL/INSTALLATION.)
•  Disconnect the driver and passenger-side curtain air bag module connectors. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION.)
•  Remove the B-pillar lower trim. (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.)
•  Disconnect the driver and passenger-side pre-tensioner seat belt connectors. (See FRONT SEAT BELT REMOVAL/INSTALLATION.)
•  Disconnect the SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
•  Inspect the wiring harnesses between SAS control module terminal 1W and crash zone sensor terminal A, SAS control module terminal 1S and crash zone sensor terminal B for the following:
―  Short to ground
―  Short to power supply
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the crash zone sensor and SAS control module.
•  Is the wiring harness normal?
Yes
Replace the crash zone sensor, then go to the next step.
(See CRASH ZONE SENSOR REMOVAL/INSTALLATION.)
No
Replace the air bag wiring harness.
3
INSPECT SAS CONTROL MODULE
•  Connect the SAS control module connector.
•  Connect the driver and passenger-side pre-tensioner seat belt connectors.
•  Connect the driver and passenger-side curtain air bag module connectors.
•  Connect the driver and passenger-side front seat connectors.
•  Connect the passenger-side air bag module connector.
•  Connect the clock spring connector.
•  Connect the crash zone sensor connector.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Is DTC B104D, B2226, B2227 and/or B2855 indicated?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.