Restraints - ABS Light ON, DTC B1650, B1760, B1761 Stored
SERVICE BULLETINNUMBER: 17-16-12
DATE: 05/29/12
APPLICABILITY:
2012MY Impreza 2.0L NA
SUBJECT:
Occupant Detection System (ODS) Occupant Control Unit
INTRODUCTION
If you encounter a customer complaint that the Air Bag Warning Light was illuminated and the Passenger Air Bag Indicator was OFF when the passenger seat was occupied, the Occupant Control Unit may need to be replaced. This bulletin is only applicable if DTC B1650, B1760 and/or B1761
are also stored in memory. A possible occupant action that may have resulted in this condition would be the use of an iPod or cell phone (plugged into the Accessory power outlet) by someone seated in
the passenger seat when the ODS is On. Another cause may be a seated passenger touching a metal part of the vehicle that is electrically grounded (i.e. forward/rearward seat adjuster lever) when the
ODS is On. The possibility of these conditions affecting the ODS is dependent upon the occupants personal capacitance. To reduce the possibility of the condition reoccurring, the Occupant Control Unit logic was modified to be less sensitive under those conditions.
Starting with 2012 Impreza, a capacitive type occupant detection sensor is used which has certain characteristics. The system is designed to detect a change in capacitance during operation. If the occupants capacitance rises abnormally high, the system turns off the ODS. Some examples of
conditions when this may occur are listed in the owners manual. If the front passengers seat cushion becomes wet, this may adversely affect the ability of the system to determine the need for passenger air bag deployment. Also, if luggage or electronic devices are placed on the front passengers seat, this may also adversely affect the ability of the system to determine the need for passenger air bag deployment. This control unit logic change does not alter the effect of conditions like these on ODS operation. These are characteristic of normal system operation.
COUNTERMEASURE IN PRODUCTION
The modified Occupant Control Unit was incorporated in production starting mid-February, 2012 with the VINs shown.
PART INFORMATION
INSPECTION PROCEDURE
REPLACEMENT PROCEDURE
WARRANTY/CLAIM INFORMATION