1. The air-conditioning system control unit software update
involves models: 2010 models Shanghai GM Buick New Regal sedan.
Symptoms: Depending on the type of configuration of air conditioning, air-conditioning systems of different models will appear the following symptoms.
(1) The air-conditioning system control unit stores the DTC B048F, B048C and B018A, and can not be cleared, but the vehicle is not equipped with a code associated with the failed humidity sensor.
(2) The air conditioning system is automatically controlled mode, sunless compensation function.
(3) equipped with an air conditioning system and the mass sensor to work, but without the option of the air quality sensor disposed in the air conditioner personalized menu.
Failure: The air-conditioning system control unit software problems caused the failure above phenomenon.
countermeasures: Use the latest version on TIS2 WEB calibration software, reprogram the control unit of the air conditioning system through the Service Programming System (SPS). After programming the software part number confirmation control unit air conditioning system has been updated to 13505735 by GDS.
2. The engine control unit software update
involves models: manufactured before April 2009 Shanghai GM Buick New Regal 2.0 L sedan.
Symptom: after cold start, the engine idling occurs a short time jitter, time is about 10 s.
Faulty: engine control unit software is calibrated in accordance with the Euro Ⅳ emission standards, in particular the cold idling period of a strict control of emissions. However, due to the impact of lower domestic fuel quality and other factors, cold engine idling phases will be short-term jitter.
countermeasures: Use the latest version on TIS2 WEB calibration software, the air conditioning system control unit reprogrammed.
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