DTC B2445, U2018

id080200802800

DTC

B2445

Passenger-side side air bag sensor system (sensor internal circuit abnormal)

U2018

Passenger-side side air bag sensor system (communication error)

DETECTION CONDITION

Warning
• Detection conditions are for understanding DTC outline before performing inspection. Performing inspection with only detection conditions may cause injury due to operating error or damage the system. When performing inspection, always follow inspection procedure.
• Malfunction in wiring harness between passenger-side side air bag sensor and SAS unit
• Malfunction in passenger-side side air bag sensor circuit

POSSIBLE CAUSE

• Open or short circuit in wiring harness between passenger-side side air bag sensor and SAS unit
• Passenger-side side air bag sensor malfunction
• SAS unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT PASSENGER-SIDE SIDE AIR BAG SENSOR
• Check following PID/DATA monitor, using SST (WDS or equivalent).
- OD_P_CRSH
• Is passenger-side side air bag sensor normal?
Yes
Present malfunction diagnosis:
• Replace SAS unit.
Past malfunction diagnosis:
• Troubleshooting completed.
No
Go to next step.
2
INSPECT WIRING HARNESS BETWEEN PASSENGER-SIDE AIR BAG SENSOR AND SAS UNIT
Warning
• Handling air bag system components improperly can accidentally deploy air bag modules and pre-tensioner seat belts, which may seriously injure you. Read AIR BAG SYSTEM SERVICE WARNINGS before handling air bag system components.
(See SERVICE WARNINGS)
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait for more than 1 minute.
• Remove column cover.
• Disconnect clock spring connector.
• Remove glove compartment.
• Disconnect passenger-side air bag module connector.
• Disconnect driver and passenger-side side air bag module connectors. (Vehicle with side air bag)
• Disconnect driver and passenger-side curtain air bag module connectors. (Vehicle with curtain air bag)
• Remove B-pillar lower trim.
• Disconnect driver and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect all SAS unit connectors.
• Disconnect passenger-side side air bag sensor connector.
• Connect negative battery cable.
• Inspect following wiring harnesses between SAS unit and passenger-side side air bag sensor terminals for short to ground, short to power supply, and open circuit:
- 2B-A
- 2C-B
• Is wiring harness okay?
Yes
Replace passenger-side side air bag sensor, then go to next step.
No
Replace wiring harnesses.
3
INSPECT SAS UNIT
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait for more than 1 minute.
• Connect all SAS unit connectors.
• Connect passenger-side side air bag sensor connector.
• Are DTCs B2445 and/or U2018 indicated?
Yes
Present malfunction diagnosis:
• Replace SAS unit.
Past malfunction diagnosis:
• Troubleshooting completed.
No
Troubleshooting completed.