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Airbag light error 21

mtimmy
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Loren Member

Loren

Posted
  • Admin
Posted

Fault code 21 - Ignition circuit, driver

Possible cause of fault:

- Short circuit to B+/ground or open circuit in the wiring between the driver's airbag unit and the airbag triggering unit

- Driver's airbag unit faulty

- Triggering unit for airbag faulty

Has the steering wheel been off lately - it would appear that the steering wheel airbag is not connected.

mtimmy Member

mtimmy

Posted
  • Author
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I have switched from 4 spoke to 3 spoke about a year ago., let me take the thing off to see if its became lose. thans Loren

Fault code 21 - Ignition circuit, driver

Possible cause of fault:

- Short circuit to B+/ground or open circuit in the wiring between the driver's airbag unit and the airbag triggering unit

- Driver's airbag unit faulty

- Triggering unit for airbag faulty

Has the steering wheel been off lately - it would appear that the steering wheel airbag is not connected.

mtimmy Member

mtimmy

Posted
  • Author
Posted

Loren I took the airbag off and checked the wiring it looks like the plug is intact, ...

what would you suggest next... it seems the triggering unit for airbag is faulty then?

I have switched from 4 spoke to 3 spoke about a year ago., let me take the thing off to see if its became lose. thans Loren

Fault code 21 - Ignition circuit, driver

Possible cause of fault:

- Short circuit to B+/ground or open circuit in the wiring between the driver's airbag unit and the airbag triggering unit

- Driver's airbag unit faulty

- Triggering unit for airbag faulty

Has the steering wheel been off lately - it would appear that the steering wheel airbag is not connected.

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
Loren I took the airbag off and checked the wiring it looks like the plug is intact, ...

what would you suggest next... it seems the triggering unit for airbag is faulty then?

I have switched from 4 spoke to 3 spoke about a year ago., let me take the thing off to see if its became lose. thans Loren

Fault code 21 - Ignition circuit, driver

Possible cause of fault:

- Short circuit to B+/ground or open circuit in the wiring between the driver's airbag unit and the airbag triggering unit

- Driver's airbag unit faulty

- Triggering unit for airbag faulty

Has the steering wheel been off lately - it would appear that the steering wheel airbag is not connected.

I think you need to find someone with a PST2 or PIWIS tester to confirm the fault and also run diagnostics to narrow down the fault.

The airbag controller is pretty expensive (about $573 MSRP as I recall) so I would make sure before doing that. You'd hate to find a broken or frayed wire later...

mtimmy Member

mtimmy

Posted
  • Author
Posted

Hum., the funny thing is I can access the airbag controller using the durametic tool., ... when the tool can still talk to the controller would that narrow it down to something else?... its kind of weird....

are there any airbag fuse somewhere because I looked at the fuse box near the foot well., the paper did not say there is a fuse for the airbag there...

Loren I took the airbag off and checked the wiring it looks like the plug is intact, ...

what would you suggest next... it seems the triggering unit for airbag is faulty then?

I have switched from 4 spoke to 3 spoke about a year ago., let me take the thing off to see if its became lose. thans Loren

Fault code 21 - Ignition circuit, driver

Possible cause of fault:

- Short circuit to B+/ground or open circuit in the wiring between the driver's airbag unit and the airbag triggering unit

- Driver's airbag unit faulty

- Triggering unit for airbag faulty

Has the steering wheel been off lately - it would appear that the steering wheel airbag is not connected.

I think you need to find someone with a PST2 or PIWIS tester to confirm the fault and also run diagnostics to narrow down the fault.

The airbag controller is pretty expensive (about $573 MSRP as I recall) so I would make sure before doing that. You'd hate to find a broken or frayed wire later...

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

Control units are fused - not the airbags themselves.

A PST or PIWIS can run diagnostics on the airbag system that the Durametric can not.

You are sure the clock-spring trigger is not damaged on the steering wheel right?

mtimmy Member

mtimmy

Posted
  • Author
Posted

I am sure., because it the steering wheel was there for at least 6 months before the light comes on.... well I guess I 'll have to go in again to see whats wrong

Control units are fused - not the airbags themselves.

A PST or PIWIS can run diagnostics on the airbag system that the Durametric can not.

You are sure the clock-spring trigger is not damaged on the steering wheel right?

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