COOLANT TEMPERTURE GAUGE INDICATES VEHICLE IS RUNNING. Cadillac DeVille 1996

REVISION: 04/11/96

THIS BULLETIN IS BEING REVISED TO ADD VIN BREAKPOINTS AND REVISE THE CORRECTION PROCEDURE. PLEASE DISCARD CORPORATE BULLETIN NUMBER 63-62-04 (SECTION 6 - ENGINE). **********************************************************************

SUBJECT: COOLANT TEMPERATURE GAUGE INDICATES VEHICLE IS RUNNING HOT (REPROGRAM I/P CLUSTER WITH CD 15 UPDATE)

MODELS: 1996 CADILLAC ELDORADO, SEVILLE

VIN BREAKPOINTS:

ELDORADO - BUILT PRIOR TO VIN BREAKPOINT 606763 SEVILLE - BUILT PRIOR TO VIN BREAKPOINT 811282

CONDITION:

SOME OWNERS MAY COMMENT THAT THE COOLANT TEMPERATURE GAUGE APPEARS TO INDICATE THE VEHICLE IS RUNNING HOT. DURING NORMAL ENGINE OPERATING CONDITIONS, THE TEMPERATURE GAUGE NEEDLE MAY BE BETWEEN THE FIFTH AND SIXTH INCREMENTS.

CAUSE:

THIS CONDITION IS CAUSED BY A SOFTWARE MISCALIBRATION.

CORRECTION:

REPROGRAM INSTRUMENT PANEL CLUSTER (IPC) WITH UPDATED SOFTWARE RELEASED ON SERVICE TECHNOLOGY GROUP (STG) TECHLINE CD #15.

1. VERIFY THAT THE VEHICLE IS OPERATING WITHIN NORMAL TEMPERATURE RANGE (REFER TO SECTION 6B OF THE APPROPRIATE SERVICE MANUAL).

2. USING A SCANTOOL OR ON-BOARD DIAGNOSTICS, READ THE IPC CPM VALUE (IP D99). IF THIS VALUE IS 7141 OR 7142, THE UPDATED SOFTWARE RELEASE HAS BEEN INSTALLED.

IMPORTANT: IF IPC VALUE IS 7141 OR 7142, DO NOT ATTEMPT TO REPROGRAM THE IPC.

IF THE VALUE IS 2040, GO TO STEP 3.

3. USING A T5 OR T6 WITH SCAN TOOL, OR A T50 OR T60, REPROGRAM THE IPC USING THE APPROPRIATE UPDATE. (IF YOU ARE USING A T50 OR T60, START AT STEP 7.)

4. CONNECT SCAN TOOL, TURN IGNITION SWITCH "ON".

5. SELECT "PROGRAMMING" (F3), ENTER MODEL YEAR.

6. SELECT "REQUEST INFO" (F0), VERIFY VIN.

7. DISCONNECT SCAN TOOL, TURN IGNITION SWITCH "OFF".

8. GO TO "DIAGNOSTIC MENU" (ENTER).

9. SELECT "SPS/EEPROM" (ENTER).

10. SELECT PROGRAMMING METHOD.

11. SELECT MENU LABELED "SPECIAL" (ENTER).

12. SELECT "PROGRAM BY VIC" (ENTER).

13. ENTER "1005" AND SELECT "DONE".

14. IF USING SCAN TOOL, CONNECT IT TO THE TERMINAL.

15. SELECT "INSTRUMENT PANEL CALIBRATION" THEN "PROGRAM" (T50 OR T60 GO TO STEP 18).

16. CONNECT SCAN TOOL, TURN IGNITION SWITCH "ON".

17. SELECT "PROGRAMMING".

18. SELECT "PROGRAM IPC".

19. VERIFY REPAIR.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: N4199 LABOR TIME: 0.4 HR

FIGURES: 00 ATTACHMENTS: 00

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.