01221

01221 - Crash Sensor Side Airbag; Driver Side (G179)

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)

Special Notes

• When found on 2019 - 2022 Atlas, Atlas Cross Sport, Golf, Golf Wagon, Jetta, Tiguan and Taos, please see TT 97-21-02 for possible wiring harness issue:
  • https://static.nhtsa.gov/odi/tsbs/2022/MC-10208280-0001.pdf NHTSA
    • May also find DTCs U0199, U0200, B1017 or B1036.