Custom Cruiser RWD V8-350 5.7L (1992)
Compressor Clutch: Customer Interest
A/C - Inoperative Compressor Clutch, False DTC 9
NUMBER: 92-T-149
CORP.REF.NO: 231209
DATE: November 1992
SECTION: 1C
SUBJECT:
INOPERATIVE A/C COMPRESSOR CLUTCH - DIAGNOSE/CUT WIRE
MODELS/YEARS:
1991-92 CUSTOM CRUISER W/C68
ELECTRONIC AIR CONDITIONING OPTION
Note:
This bulletin also includes an update to the 1991-92 Custom Cruiser Service Manual Section IC and the 1991 Service Manual Supplement.
CONDITION:
The air conditioning (A/C) system may become inoperative when the air compressor clutch does not engage. This may also coincide with the "Degree F"
or "Degree C" flashing and the graphic illuminating on the Electronic Air Conditioning Control Display. A Diagnostic Trouble Code (DTC) 9 (low
Freon) may also be stored in the microprocessor of the Air Conditioning Control Assembly.
CAUSE:
The above conditions will occur when the microprocessor in the Electronic Air Conditioning System detects low Freon. However, a false DTC 9 may be
set if the A/C control relay, high pressure cutout switch, or pressure cycling switch operate intermittently.
CORRECTION:
A new diagnostic procedure, Pages 1C-27 and 1C-28 for the 1992 service manual, and Page 1C1-24 for the 1991 service manual and page "B" Carline,
1C1-12 for the 1991 service manual supplement 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, it 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 19 or 20 - Code 09 Low Freon Detected" in Section 1C1 of the 1991 service manual and Section 1C of the 1992
service manual.
Low freon detection will still be provided by the A/C Pressure Cycling Switch, as in the Manual Air Conditioning Systems. The DTC 9 must be cleared
in order for the system to function properly.
To disable the Electronic Air Conditioning low freon detection system:
1.
Remove the lower passenger side I.P. sound insulation panel.
