DTC Code 01221 - Mk V Golf GT TDI

Hi Guys,

I was reversing my car when suddenly the airbag light came on

I had the car scanned and the light cleared, however after a few minutes it was back on.

The full details are:
01221 Crash Sens side airbag drive side G179 - sporadic short circuit to another value
01221 Crash sens side airbag driv side G179 - sporadic speed difference too great.

I have had a search on the forum and online and people seem to state it is either the wiring under the seat (which i have had a wiggle with) or the wires from the door pillar.

I would be grateful if someone could point me in the right direction on how to resolve this?

Thank you for your help.

Sam

01221 - Ross-Tech Wiki

Quote:

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01221 - Crash Sensor Side Airbag; Driver Side (G179)
01221 - Crash Sensor Side Airbag; Driver Side (G179): Faulty
01221 - Crash Sensor Side Airbag; Driver Side (G179): Open Circuit / Short to Plus

Possible Symptoms

Airbag Warning Light ON

Possible Causes

Wiring/Connections between Airbag Control Module (J234) and Crash Sensor Side Airbag; Driver Side (G179) faulty
Crash Sensor Side Airbag; Driver Side (G179) faulty
Airbag Control Module (J234) faulty

Possible Solutions

Check Wiring/Connections between Airbag Control Module (J234) and Crash Sensor Side Airbag; Driver Side (G179)
Replace Crash Sensor Side Airbag; Driver Side (G179)
Replace Airbag Control Module (J234)


01221 - Crash Sensor Side Airbag; Driver Side (G179): No or Incorrect Basic Setting / Adaptation
Possible Symptoms

Airbag Warning Light ON

Possible Causes

Wrong Crash Sensor Side Airbag; Driver Side (G179) installed
Newly Installed Airbag Module is Not Compatible With Crash Sensor(s)

Possible Solutions

Install correct Crash Sensor Side Airbag; Driver Side (G179)
Install Airbag Module that is Compatible With Crash Sensor(s)

Special Notes

The US Market (9M) Jetta has a common Airbag Control Module replacement conflict with the existing Crash Sensors. This is mentioned in TSB # 69-08-04 with the following example:
When control module 1C0-909-605-F-004 (coded to 12340) is replaced with 1C0-909-605-F-01E the original Crash Sensors are not compatible. The new module will refuse coding if DTCs 01221, 01222, 01738, or 1739 are stored. This is also noted here: Airbag Coding

The Crash Sensors can be checked by using the control module identification and the measuring blocks.

Address 15: Airbags
Controller: 1T0 909 605
Component: 05 AIRBAG VW62 0506 2112
Coding: 0012341

The 0506 in this example stands for the required Crash Sensor ID, the first 2 digits (05) apply for the front crash sensors, while the second 2 digits (06) apply for the rear crash sensors. The ID of the currently installed Crash Sensors can be determined by checking Measuring Value Block (MVB) 009.


01221 - Crash Sensor Side Airbag; Driver Side (G179): Implausible Signal
Possible Symptoms

Airbag Warning Light ON

Possible Causes

Wrong/Incompatible Crash Sensor Side Airbag; Driver Side (G179) installed
Wiring/Connections between Airbag Control Module (J234) and Crash Sensor Side Airbag; Driver Side (G179) faulty

Possible Solutions

Check Crash Sensor Side Airbag; Driver Side (G179) Part Number
Install correct Crash Sensor Side Airbag; Driver Side (G179)
Check Wiring/Connections between Airbag Control Module (J234) and Crash Sensor Side Airbag; Driver Side (G179)

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