Technical Bulletin SUBARU IMPREZA – ABS SYSTEM PROBLEM

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Filed Under (Subaru) by admin on 17-04-2010

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Fault ABS warning light constantly “ON” with no ABS operation. Callers often remark that they are unable to communicate with the ABS ECM even though using suitable diagnostic equipment.
Cause The ABS ECM / hydraulic modulator / ABS pump units are a combined unit assembly and are located behind the off side front headlamp. The caller reported that the harness plug was full of water and the terminals were found to be excessively corroded, to the point were the harness plug and ABS ECM needed replacing. The caller also reported that this was the second time he
had experienced the problem on Subaru Impreza vehicles. Vehicles
Rectification
If the terminals on both the ABS ECM and ABS ECM harness plug are heavily corroded beyond cleaning and repair, it will be necessary to replace both the ABS ECM / hydraulic modulator / ABS pump assembly in addition to the ABS ECM harness plug

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