INTERMITTENT A/C OVERHEAT, A/C COMPRESSOR OFF MESSAGE. Cadillac Seville 1993

SUBJECT: INTERMITTENT "A/C OVERHEAT, A/C COMPRESSOR OFF" MESSAGE AND ACP CODE A049 (REPLACE ACP UNIT)

MODELS: 1993 CADILLAC ELDORADOS 1993 CADILLAC SEVILLES

CONDITION:

SOME OWNERS MAY EXPERIENCE A CONDITION OF INTERMITTENT "A/C OVERHEAT, A/C COMPRESSOR OFF" MESSAGE AND ACP CODE A049 USUALLY ON HOT RESTART WITH THE AUTO MODE SELECTED ON THE ECC.

CAUSE:

SOFTWARE CALIBRATION PROBLEM.

CORRECTION:

TO REPAIR THIS CONDITION PERFORM THE FOLLOWING PROCEDURE:

1. ENSURE THE CONDENSER IS FREE OF OBSTRUCTION (I.E., DIRT, DEBRIS, BENT FINS, ETC.). CLEAN IF NECESSARY.

2. VERIFY OPERATION AND ROTATING DIRECTION OF THE COOLING FAN.

3. ENTER DIAGNOSTICS AND RECORD (AD99) THE ACP PROM I.D. REFER TO PAGE 1C1-7 OF THE 1993 SERVICE INFORMATION MANUAL FOR THE DETAILED PROCEDURE.

IF THE ACP PROM I.D. IS NOT 9807, REMOVE THE ACP PER SECTION 1B-39 OF THE SERVICE INFORMATION MANUAL AND ORDER A REPLACEMENT ACP, P/N 16199718. THE PROM I.D. OF 16199718 ACP IS 9807.

REINSTALL THE ACP PER SECTION 1B OF THE SERVICE INFORMATION MANUAL.

IF THE ACP PROM I.D. IS 9807, FOLLOW THE DIAGNOSTIC PROCEDURE OF "CODE A049" IN SECTION 1C1-28 OF THE 1993 ELDORADO/SEVILLE SERVICE INFORMATION MANUAL.

NOTE: THE ACP IS A REMANUFACTURED UNIT AND IT HAS A CORE CHARGE. PLEASE RETURN THE CORE UNIT TO GMSPO THROUGH THE NORMAL CORE RETURN PROCEDURE.

PARTS ARE EXPECTED TO BE AVAILABLE ON OCTOBER 25, 1993.

FOR VEHICLES REPAIRED UNDER WARRANTY USE LABOR OPERATION D0770. USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.