DTC B2444, U2017


BHE080201046W24

DTC

B2444

Driver-side side air bag sensor (internal circuit abnormal)

U2017

Driver-side side air bag sensor (communication 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.
• Malfunction in the wiring harness between the driver-side side air bag sensor and SAS unit
• Malfunction in the driver-side side air bag sensor circuit

POSSIBLE CAUSE

• Open or short circuit in the wiring harness between the driver-side side air bag sensor and SAS unit
• Driver-side side air bag sensor malfunction
• SAS unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE SIDE AIR BAG SENSOR

• Using the WDS or equivalent, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE.)
– OD_D_CRSH
• Is the driver-side side air bag sensor normal?
Yes

[Present malfunction diagnosis]

• Replace the SAS unit.

[Past malfunction diagnosis]

• DTC troubleshooting completed.
No
Go to the next step.
2

INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG SENSOR AND SAS UNIT

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.
(See SERVICE WARNINGS.)
(SeeSERVICE CAUTIONS.)
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• 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 side air bag module connectors.
• Disconnect the driver and passenger-side curtain 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.
• Disconnect the driver-side side air bag sensor connector.
• Connect the negative battery cable.
• Inspect the wiring harnesses between SAS unit terminal 2Z and driver-side side air bag sensor terminal A, SAS unit terminal 2AA and driver-side side air bag sensor terminal B for the following:
– Short to ground
– Short to power supply
– Open circuit
• Is the wiring harness normal?
Yes
Replace the driver-side side air bag sensor, then go to the next step.
No
Replace the air bag wiring harness.
3

INSPECT SAS UNIT

• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Connect the SAS unit connector.
• Connect the driver-side side air bag sensor connector.
• Are DTCs B2444 and/or U2017 indicated?
Yes

[Present malfunction diagnosis]

• Replace the SAS unit.

[Past malfunction diagnosis]

• DTC troubleshooting completed.
No
DTC troubleshooting completed.