Here is the bulletin....
Service Information
2010 Chevrolet Camaro |
Camaro VIN F Service Manual | Document ID: 2583310
#PIC5424: Rear Axle Chatter-Type Noise On Low-Speed Turns In Reverse / ABS Noise - keywords grind ratchet rattle - (Feb 18, 2011)
Subject: Rear Axle Chatter-Type Noise on Low-Speed Turns in Reverse / ABS Noise
Models: 2010 - 2011 Chevrolet Camaro Built Prior to August 25, 2010 The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern: A customer may comment of a noise heard when coasting backward and turning the steering wheel. This will only be noticed at low speeds of approximately 3 MPH, vehicle coasting backwards with some steering input. Transmission gear position is not a factor. This is most commonly experienced if backing out of a downhill driveway, coasting and turning the steering wheel. This noise is caused by the ABS pump motor priming.
Note: It will not occur if coasting straight backwards, steering wheel input is necessary to experience this condition.
Recommendation/Instructions: This concern should not be confused with the concern listed in the current version of PI0137 because both concerns could likely have similar customer comments. To determine which issue is occurring, temporarily remove the 25A F40U fuse from the UBEC and back the vehicle at slow speeds of approximately 3 MPH while providing some steering input. If the noise is not present while the fuse is removed then reinstall the fuse, clear all codes that set due to the fuse removal and continue with the repair outlined in this document.
Do not replace any parts for this condition.
Engineering has identified the concern and created an EBCM calibration to resolve this issue. The calibration is available in Tis2Web. SPS program the EBCM with the latest calibration to resolve this concern.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
Hopefully this helps,
Paul