01221

From Ross-Tech Wiki

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)

Special Notes