DTC B2296

id080200802400

DTC B2296

Crash zone sensor (communication error, internal circuit abnormal)
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 the wiring harness between the crash zone sensor and SAS unit
•  Malfunction in the crash zone sensor circuit
POSSIBLE CAUSE
•  Crash zone sensor connector malfunction
•  Open or short circuit in the wiring harness between the crash zone sensor and SAS unit
•  Crash zone sensor malfunction
•  SAS unit 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.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  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 UNIT 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 curtain air bag module connectors.
•  Disconnect the driver and passenger-side side air bag module connectors.
•  Remove the rear door lower trim.
•  Disconnect the driver and passenger-side pre-tensioner seat belt connectors.
•  Partially peel back the floor covering.
•  Disconnect the SAS unit connector.
•  Inspect the wiring harnesses between SAS unit connector terminal 1B and crash zone sensor connector terminal A, and SAS unit terminal 1C and crash zone sensor connector terminal B for the following:
―  Short to body ground
―  Open circuit
―  Short circuit between terminals
Note
•  Inspect for continuity while shaking the wiring harness between the SAS unit and crash zone sensor.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS unit and the crash zone sensor.
3
INSPECT THE WIRING HARNESS BETWEEN THE SAS UNIT AND CRASH ZONE SENSOR CONNECTOR FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position with SAS unit connector and crash zone sensor connector disconnected.
•  Measure the voltage of SAS unit connector terminals 1B and 1C of SAS unit harness side connector.
Note
•  Measure the voltage while shaking the wiring harness between the SAS unit and crash zone sensor.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS unit 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 DTC INSPECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Reconnect all disconnected connectors
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Clear DTCs using the WDS or eguivalent. (See CLEARING DTC.)
•  Perform the DTC inspection for the SAS unit using the WDS or eguivalent. (See DTC DISPLAY.)
•  Are the same DTCs present?
Yes
Replace the SAS unit.
(See SAS UNIT REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.