DTC B104D, B2226, B2227, B2856

id080200004500

DTC

B104D

Crash zone sensor assembly incorrect

B2226

Crash zone sensor system internal circuit disabled

B2227

Crash zone sensor system communication error

B2856

Crash zone sensor system communication data error
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.
•  The SAS control module detects an error of impact magnitude set in the sensor, which occurs due to installation mismatch of the crash zone sensor or side air bag sensors.
•  Malfunction in wiring harness between crash zone sensor and SAS control module
•  Malfunction in crash zone sensor circuit
POSSIBLE CAUSE
•  Crash zone sensor mis-installed with wrong sensor
•  Crash zone sensor connector malfunction
•  Open or short circuit in the wiring harness between the 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 component parts improperly can accidentally operate (deploy) the air bag module, which may seriously injure you. Read the service warnings/cautions and the workshop manual before handling the air bag system components.
•  Turn the ignition switch to the LOCK position.
•  Remove the battery cover.
•  Disconnect the negative battery cable and wait for 1 min or more. (See BATTERY REMOVAL/INSTALLATION [L8, LF].)
•  Remove the front bumper. (See FRONT BUMPER REMOVAL/INSTALLATION.)
•  Disconnect the crash zone sensor connector. (See CRASH ZONE SENSOR REMOVAL/INSTALLATION.)
•  Inspect the crash zone sensor connector. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the crash zone sensor connector?
Yes
Replace the crash zone sensor wiring harness.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND CRASH ZONE SENSOR
•  Remove the column cover.
•  Disconnect the clock spring connector.
•  Remove the glove compartment.
•  Disconnect the passenger-side air bag module connector.
•  Disconnect the driver and passenger-side seat connectors.
•  Remove the back trim.
•  Remove the driver and passenger-side pre-tensioner seat belt connectors.
•  Remove the console panel.
•  Disconnect the SAS control module connectors.
•  Inspect the wiring harnesses between SAS control module connector terminal 1E and crash zone sensor connector terminal A, SAS control module connector terminal 1B and crash zone sensor connector terminal B for the following:
―  Short circuit between terminals
―  Short to body ground
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and crash zone sensor.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and the crash zone sensor.
3
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND CRASH ZONE SENSOR FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position with SAS control module and crash zone sensor connector disconnected.
•  Measure the voltage of SAS control module connector terminals 1B and 1E.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and crash zone sensor.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the crash zone sensor.
No
Replace the crash zone sensor, then go to the next step.
(See CRASH ZONE SENSOR REMOVAL/INSTALLATION.)
4
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1min or more.
•  Connect the crash zone sensor connector.
•  Connect the SAS control module connectors.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Clear the DTC for the SAS control module using the M-MDS.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
(See DTC DISPLAY.)
•  Are the same DTCs present?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.