B1243 - GSW Terminal Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Airbag Sensor Assembly
  • Airbag Sensor Assembly harness is open or shorted
  • Airbag Sensor Assembly circuit poor electrical connection
  • Faulty Main Body ECU

Possible symptoms

  • Air Bag Warning Light ON

B1243 Description

If the collision door lock release function does not operate normally, or an open or short in the GSW input circuit of the Main Body ECU is detected, Diagnostic Trouble Code (DTC) B1243 will be stored.
OBDII Code B1243 - GSW Terminal Circuit Malfunction - AutoCodes.com

B1243 Information for specific makes

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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