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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC B2445, U2018 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT PASSENGER-SIDE SIDE AIR BAG SENSOR 
  • Check the following PID/DATA monitor, using SST  (WDS or equivalent). (See PID/DATA MONITOR TABLE  .)
    • OD_P_CURT
  • Is passenger-side side air bag sensor normal?
 Yes Present malfunction diagnosis: 

Past malfunction diagnosis: 
  • Troubleshooting completed.
No Go to next step.
2 INSPECT WIRING HARNESS BETWEEN PASSENGER-SIDE AIR BAG SENSOR AND SAS CONTROL MODULE 
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 .)

    (See SERVICE CAUTIONS .)


  • 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. (Vehicles with side air bag)
  • Disconnect driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
  • Remove B-pillar lower trims. (Vehicles with pre-tensioner seat belt)
  • Disconnect driver and passenger-side pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt)
  • Turn up floor covering.
  • Disconnect all SAS control module connectors.
  • Disconnect passenger-side side air bag sensor connector.
  • Connect negative battery cable.
  • Inspect the following wiring harnesses between SAS control module 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. (See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION .)
No Replace wiring harnesses.
3 INSPECT SAS CONTROL MODULE 
  • Turn ignition switch to LOCK position.
  • Disconnect negative battery cable and wait for more than 1 minute. 
  • Connect all SAS control module connectors.
  • Connect passenger-side side air bag sensor connector.
  • Are DTCs B2445 or U2018 or both indicated?
 Yes Present malfunction diagnosis: 

Past malfunction diagnosis: 
  • Troubleshooting completed.
No Troubleshooting completed.
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