NHTSA ID Number: 10150933
Manufacturer Communication Number: 07-140-18
This bulletin announces an additional troubleshooting step to follow when diagnosing a DTC U0284: “LOST COMMUNICATIONWITH ACTIVE GRILLE SHUTTER MODULE “A”. Water intrusion into the harness wiring leading to connector B63 for the Active Grille Shutter (AGS) may lead to corrosion of the harness wiring and/or connector terminals and result in a communication loss with the ECM.
3 Affected Products
This bulletin announces an additional troubleshooting step to follow when diagnosing a DTC U0284: “LOST COMMUNICATIONWITH ACTIVE GRILLE SHUTTER MODULE “A”. Water intrusion into the harness wiring leading to connector B63 for the Active Grille Shutter (AGS) may lead to corrosion of the harness wiring and / or connector terminals and result in a communication loss with the ECM.
PRODUCTION CHANGE INFORMATION:
The installation method of the corrugated plastic harness protection tube was changed to prevent damage starting with the following VINs:
- 4-door: J3624930
- Wagon: J3751997
SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
Always refer to the applicable Service Manual and review the full requirements of the repair being performed. The Service Manual procedures contain information critical to performing an effective repair the first time and every time. This includes but is not limited to: important SAFETY precautions, proper inspection criteria, necessary special tools, required processes and related onetime-use parts needed for a complete and lasting repair.
The AGS harness connector B63 is located at the end of the AGS assembly in the l/front as shown below.
IMPORTANT: Before proceeding with any other electrical testing as directed by the current Service Manual diagnostics, access and disconnect the AGS harness connector. The photos below show both sides of the harness connection with corrosion present. If corrosion or an open circuit in the wiring is identified, replace both the bulkhead wiring harness and AGS assembly following the procedure outlined in the applicable Service Manual.
NOTE: Do not attempt to repair the wiring or clean the connector terminals. If there is no corrosion in either connector, check the wiring to the harness connector and confirm there is not an open circuit, broken wire as shown below or unexpected high resistance to indicate corrosion in the wiring. If no wiring or connector damage is identified, proceed with electrical testing Steps 3 to 6 as outlined in the applicable Service Manual for DTC U0284.
The related Service Manuals will be updated with this new initial diagnostic step.
APPLICABILITY: 2017-19MY Impreza
SUBJECT: DTC U0284, Additional Diagnostics Added
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited Warranty period or covered by an active Subaru Added Security Classic or Gold plan, this repair may be submitted using the following claim information:
|Labor Description||Labor Operation #||Labor Time||Fail Code|
|ACTIVE GRILLE SHUTTER AND BULKHEAD HARNESS REPLACEMENT FOR DTC U0284||A887-112||7.3||FCF-41|
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Last update on 2020-04-08 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2020-04-08 / Affiliate links / Images from Amazon Product Advertising API