Engine, A/T Controls - Hesitation/A/T Shift Issues: Overview
Classification: AT 11-004Reference: ITB11-020
Date: March 10, 2011
2011 QX56; TRANSMISSION SHIFT ISSUES AND HESITATION ISSUES
APPLIED VEHICLES: 2011 QX56 (Z62)
IF YOU CONFIRM
Any of the following symptoms:
^ Gear hunting or excessive downshifting when using the Intelligent Cruise Control (ICC)
and/or
^ The feel of the transmission shifting from Neutral to Drive (may be described as "bump" feel from the rear) while stopped with the transmission in Drive
and/or
^ A slight hesitation when accelerating from a stop,
and/or
^ A slight vehicle shudder/vibration during light acceleration,
ACTIONS
1. Perform ECM reprogramming.
^ Refer to Step 3 under ECM reprogramming in the Service Procedure to confirm ECM reprogramming applies and is needed for the vehicle you are working on.
2. Perform TCM reprogramming.
^ Refer to Step 3 under TCM reprogramming in the Service Procedure to confirm TCM reprogramming applies and is needed for the vehicle you are working on.
3. If equipped with Intelligent Cruise Control (ICC) perform ICC reprogramming.
^ Refer to Step 3 under ICC reprogramming in the Service Procedure to confirm ICC reprogramming applies and is needed for the vehicle you are working on.
4. Test drive the vehicle and confirm the incident is resolved.
IMPORTANT:
The purpose of ACTIONS (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.
CLAIMS INFORMATION