Possible Cause

[B0021-11] 

• Connection malfunction or short circuit to ground of harness and connector
• Internal malfunction of curtain air bag module
• Internal malfunction of air bag diagnosis sensor unit

[B0021-12] 

• Connection malfunction or short circuit to power supply of harness connector
• Internal malfunction of curtain air bag module
• Internal malfunction of air bag diagnosis sensor unit

[B0021-13] 

• Connection malfunction or open circuit of harness connector
• Internal malfunction of curtain air bag module
• Internal malfunction of air bag diagnosis sensor unit

[B0021-2B, B0021-9A] 

• Connection malfunction or short circuit of harness connector
• Internal malfunction of curtain air bag module
• Internal malfunction of air bag diagnosis sensor unit

[B0021-55] 

Incomplete of configuration for air bag diagnosis sensor unit