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2003 cayenne s side passenger curtain air bag

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Need some help with a problem that popped up after I got the car back from the dealer. it came back with the airbag light on . was not on when the car went in for service. they said it was the side passengers side curtain airbag. they wanted  2300.00 to replace. so I purchased a new one installed it and light is still on. seems the real problem is an open or low voltage and resistance to airbag.

anyone else had this problem?


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Fault code 1589

Head airbag ignition circuit, passenger side


Possible cause of fault:
- Upper limit exceeded (based on resistance of head airbag on passenger side and wires between airbag trigger unit and head airbag on passenger side)
- Lower limit not reached (based on resistance of head airbag on passenger side and wiring between airbag trigger unit and head airbag on passenger side)
- Short circuit to positive 

- Short circuit to ground
- Head airbag on passenger side faulty
- Airbag trigger unit faulty

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