Air Bag System - False DTC 26 Information
NUMBER: 17-13-07DATE: 10/15/07
APPLICABILITY:
2006~07MY Impreza
SUBJECT:
False DTC 26 - "Passenger's Airbag Indicator Failure"
INTRODUCTION
The purpose of this bulletin is to assist when diagnosing DTC 26 As indicated in the Service Manual, there are several conditions that can cause DTC 26 to be stored in memory One of the items which should not be overlooked when diagnosing is the clock.
Even though the airbag system, including the Passenger Airbag ON/OFF status indicator light is functioning properly, a false DTC 26 code could be set in the following situation:
Since the passenger airbag status indicator is using Accessory power supply when the ignition is turned to the "START" position, power to the airbag ON/OFF status indicator shuts off during engine cranking. When the power supply to the airbag status indicator shuts off for more than 2 seconds, the Airbag Control Module diagnostic logic concludes that communication between the Airbag Control Module and the passenger airbag ON/OFF status indicator has failed. DTC 26 is incorrectly set and the malfunction indication lamp (MIL) for the airbag system is turned on.
To correct this misjudgment condition, the circuit logic in the clock has been modified so that power will be supplied to the passenger airbag status indicator during cranking.
COUNTERMEASURE
If diagnosis determines that there is no communications failure and DTC 26 was incorrectly set because of the cranking time situation above, the following procedure can be followed.
PART INFORMATION
REPAIR PROCEDURE/INFORMATION
Check the part number of the clock currently installed in the vehicle. If equipped with the old style, replace it with the new style.
1) Record radio stations
2) Disconnect negative battery cable
3) Remove the clock by carefully lifting up on the clock cover and disengage the 2 front clips
4) Disconnect the wiring harness and remove the 2 screws which secure the clock to the cover.
5) Install new clock in reverse order of removal
6) Reconnect negative battery cable
7) Reset radio stations and clock
8) Confirm that the condition is corrected
WARRANTY/CLAIM INFORMATION
For vehicles within the Basic New Car Limited Warranty period, refer to the Subaru Warranty Wizard for claim information.
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