Infiniti QX56 2011–2012 — technical service bulletin
Bulletin ITB12025A · NHTSA communication 10192495 · issued Dec 16, 2014
Technical service bulletin
communication type
Power Train
component
2011–2012
model years
2
vehicle entries
Official summary
IF YOU CONFIRM The Engine Cooling Fan is louder than normal. and There is a noticeable lack of power when accelerating in traffic, particularly in HOT weather. ACTIONS 1. Reprogram the ECM, if necessary. 2. Perform Engine Fan Coupler function inspection. - With engine temperature between 80-95°C (176-203°F), confirm that Cooling Fan speed responds to the commands of the ECM with the procedure starting on page 10. 3. Replace the fan coupler, if necessary. See this bulletin for further detail.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.