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ABS Light On, DTCs C0265, C0201, U1041 set and/or Loss of Communication with Brake Mo

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Old 08-29-2011, 12:37 AM   #1
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Condition: ABS light is on. DTCs C0265 and C0201 may be set in the brake module. DTC U1041 may be set in other modules. There may be a loss of communication with the brake module. A poor connection at the EBCM ground may cause unnecessary replacement of brake modules.

Repair: Do not replace the brake module to correct this condition. Perform the following repair before further diagnosis of the EBCM. Reground EBCM Ground. The EBCM ground is different for each application. Midsize Utilities = Ground 304, SSR = Ground 400, Full size Trucks and Utilities = Ground 110.

Perform the following steps to improve the connection of the EBCM Ground:

Remove the EBCM Ground. The EBCM Ground is located on the frame beneath the driver's side door. If multiple grounds are found in this location, the EBCM ground can be identified as the heavy (12-gauge) wire.

If the original fastener has a welded on nut, remove the nut from the frame, and if required, enlarge the bolt hole to accommodate the new bolt and nut.

Clean the area, front and back.

Install the ground, then the washer and then the bolt to the frame.
It is important to use the bolts, washers and nuts specified in this bulletin. These parts have been identified due to their conductive finish.

Install a washer and nut to the back side of the frame. Tighten the nut to 9 Nm (79 lb in).

Cover the front and back side of the repair area using Rubberized Undercoating.

An additional check can be made to ensure a good connection for the battery cable to frame ground. It is possible for this ground to cause similar symptoms with the ABS as described above.
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