DTC B2228, B2230, B2232, B2234


BHE080201046W19

DTC

B2228

Driver-side air bag module (inflator No.2) circuit short to body ground

B2230

Driver-side air bag module (inflator No.2) circuit short to power supply

B2232

Driver-side air bag module (inflator No.2) circuit resistance high

B2234

Driver-side air bag module (inflator No.2) circuit resistance low

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.
• Abnormal resistance (other than 1.5-3.7 ohms ) detected in the driver-side air bag module (inflator No.2) circuit
• Malfunction in the wiring harness between the driver-side air bag module (inflator No.2) and SAS unit

POSSIBLE CAUSE

• Open or short circuit in the wiring harness between the clock spring and SAS unit
• Clock spring malfunction
• Driver-side air bag module (inflator No.2) malfunction
• SAS unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE AIR BAG MODULE (INFLATOR NO.2)

• Using the WDS or equivalent, verify the following PID/DATA monitor.
– D_ABAGR2
• Is the resistance of the driver-side air bag module normal?
– Resistance: 1.5-3.7 ohms
Yes

[Present malfunction diagnosis]

• Replace the SAS unit.

[Past malfunction diagnosis]

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

INSPECT DRIVER-SIDE AIR BAG MODULE CONNECTOR (CLOCK SPRING)

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.)
(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 driver-side air bag module connector.
• Is there any malfunction of the driver-side air bag module connector?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
3

VERIFY WHETHER MALFUNCTION IS IN DRIVER-SIDE AIR BAG MODULE (INFLATOR NO.2) OR RELATED WIRING HARNESS

• Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to driver-side air bag module (inflator No.1) connector terminals 3A and 3B, and driver-side air bag module (inflator No.2) connector terminals 4A and 4B.
• Set the resistance of the SST (Fuel and thermometer checker) to the 2-ohm position.
• Connect the negative battery cable.
• Turn the ignition switch to the ON position.
• Using the WDS or equivalent, verify the following PID/DATA monitor.
– OD_DAB2_ST
• Are related wiring harnesses normal?
Yes
Replace the driver-side air bag module.
No
Go to the next step.
4

INSPECT CLOCK SPRING

• Inspect the clock spring.
• Is the clock spring normal?
Yes
Go to the next step.
No
Replace the clock spring.
5

INSPECT WIRING HARNESS BETWEEN CLOCK SPRING AND SAS UNIT

• 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.
• Inspect the wiring harness between SAS unit terminal 1G and clock spring terminal 1B, SAS unit terminal 1J and clock spring terminal 1A for the following:
– Short to ground
– Short to power supply
– Open circuit
• Is the wiring harness normal?
Yes

[Present malfunction diagnosis]

• Replace the SAS unit.

[Past malfunction diagnosis]

• DTC troubleshooting completed.
No
Replace the air bag wiring harness.