Roadmaster Estate Wagon V8-350 5.7L (1993)
A new diagnostic procedure (Pages 1C-26 and 1C-27 in the 1992 Buick Service Manual, and Page 1C1-24 in the 1991 Service Manual) should be used
to diagnose the above condition. This diagnostic procedure will determine if a false DTC 9 was set and stored. After the new diagnostic procedure has
been performed, if system checks O.K., the following steps should be performed to disable the low Freon detection system of the Electronic Air
Conditioning Control, to prevent a false DTC 9 being set by the microprocessor.
NOTE:
This new procedure replaces "Figure 20 - Code 09 Low Freon Detected" in Section 1C of the Service Manual.
