SMU - SECTION 7A1A - TRANSAXLE DATA LINK. Geo Metro 1995

---------------------------------------------------------------------- SERVICE MANUAL UPDATE ----------------------------------------------------------------------

SUBJECT: SECTION 7A1A - TRANSAXLE DATA LINK CONNECTOR (TDLC)

MODELS: 1995 GEO METRO

THE FOLLOWING INFORMATION SERVES TO REPLACE THE INFORMATION FOUND IN SECTION 7A1A OF THE 1995 GEO METRO SERVICE MANUAL (GMP/95-M). THIS PARAGRAPH REPLACES THE PARAGRAPH FOUND ON PAGE 7A1A-3 UNDER THE HEADINGS, "OUTPUT CONTROLLED DEVICES", "TRANSAXLE DATA LINK CONNECTOR (TDLC)" DOWN TO THE IMPORTANT STATEMENT. THE ART BELOW REPLACES "FIGURE 5 - TRANSAXLE DIAGNOSTIC CONNECTIONS" ALSO FOUND ON PAGE 7A1A-3.

THE TRANSAXLE DATA LINK CONNECTOR (TDLC) IS LOCATED UNDER THE INSTRUMENT PANEL TO THE RIGHT OF THE STEERING COLUMN. THE TDLC IS A NATURAL COLORED SIX CAVITY CONNECTOR WHICH IS USED FOR ACCESSING TRANSAXLE DIAGNOSTIC TROUBLE CODES (DTCS). THIS IS ACCOMPLISHED BY CONNECTING A TEST LAMP FROM TERMINAL ONE ("1") OF THE TDLC TO B+ AND CONNECTING A FUSED JUMPER WIRE FROM TERMINAL TWO ("2") TO TERMINAL FOUR ("4") OF THE TDLC WITH THE ENGINE RUNNING (FIGURE 5). THE TRANSAXLE CONTROL MODULE (TCM) WILL THEN CAUSE THE TEST LAMP TO FLASH A CODED NUMBER SEQUENCE. THE NUMBER OF FLASHES WILL EQUAL THE FIRST DIGIT OF THE TWO DIGIT DTC. A 1.5 SECOND PAUSE WILL FOLLOW, AND THE SECOND SET OF FLASHES WILL EQUAL THE SECOND DIGIT OF THE TWO DIGIT DTC. IF SEVERAL DTCS HAVE BEEN STORED, A 2.5 SECOND PAUSE WILL SEPARATE EACH DTC BEGINNING WITH THE SMALLEST NUMBER DTC FIRST. IF NO MALFUNCTIONS WITHIN THE ELECTRONIC CONTROL SYSTEM EXIST, THE TEST LAMP WILL FLASH ONCE. A 1.5 SECOND PAUSE WILL FOLLOW. THEN, TWO MORE ONE SECOND FLASHES INDICATING A DTC 12. DTC 12 INDICATES THAT NO MALFUNCTIONS IN THE ELECTRONIC CONTROL SYSTEM EXIST AT THIS TIME. DTCS OTHER THAN DTC 12 INDICATES A MALFUNCTION IN THE ELECTRONIC CONTROL SYSTEM. REFER TO THE "TCM DIAGNOSTIC CIRCUIT CHECK" FOR PROCEDURES ON RETRIEVING DTCS AND REPAIRING MALFUNCTIONS IN THE ELECTRONIC CONTROL SYSTEM.

INSERT ART HERE FIGURE 5 - TRANSAXLE DIAGNOSTIC CONNECTIONS

FIGURES: 1

Object Number: 93899 Size: LF

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.