For 1990-2009 cars

# SMU - SECTION 8A - REVISED ELECTRICAL DIAGNOSIS

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 8A - REVISED ELECTRICAL DIAGNOSIS FOR DIC MESSAGE

#### MODELS: 1995 OLDSMOBILE EIGHTY EIGHT, NINETY EIGHT WITH DIGITAL CLUSTER (U2A)

THIS BULLETIN CONTAINS A REVISION TO SECTION 8A-82 TO CLARIFY ELECTRICAL DIAGNOSIS FOR DIC MESSAGE, "COOLANT LVL SYS PROB" ON VEHICLES WITH DIGITAL CLUSTER (U2A). THE TERMINAL NUMBER CALLOUT FOR THE OIL LEVEL MODULE HAS BEEN CORRECTED AND THE RESISTANCE VALUE WHEN MEASURING FROM INSTRUMENT PANEL CLUSTER CONNECTOR C1, TERMINAL D14 TO OIL LEVEL MODULE CONNECTOR TERMINAL 4 HAS BEEN CHANGED FROM 5 OHMS TO APPROXIMATELY 0 OHMS.

CHART "C" ON PAGE 8A-82-21 HAS BEEN UPDATED TO CYCLE THE IGNITION SWITCH WHEN USING THE J33431 I/P TESTER TO SIMULATE THE FUEL SENDER RESISTANCE TO DRIVE THE GAGE. THE OLDSMOBILE DIGITAL CLUSTER (U2A) USES A FUEL ANTISLOSH CIRCUIT WHICH NEEDS TO BE RESET IN ORDER TO GET AN IMMEDIATE READ OF THE GAGE. THIS FUEL ANTISLOSH CIRCUIT IS RESET BY CYCLING THE IGNITION SWITCH FROM OFF TO RUN.

PAGES 8A-82-21 AND 8A-82-35 ARE REVISED TO REFLECT THESE CHANGES.

FIGURES: 0 ATTACHMENTS: 2

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.

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