SMU - SECTION 6E3 - DRIVEABILITY & EMISSIONS

SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E3-DRIVEABILITY AND EMISSIONS REVISED FIGURE A-2, OBD SYSTEM CHECK, CHART A-1 AND CHART A-2 ART

MODELS: 1995 CHEVROLET CAVALIER 1995 PONTIAC SUNFIRE WITH 2.3L ENGINE (VIN D-RPO LD2)

THIS BULLETIN IS BEING ISSUED TO REVISE THE 1995 "J" SERVICE MANUAL UPDATE, GMP/95-J-UPD. THIS BULLETIN CORRECTS ERRORS IN THE MANUAL DUE TO LATE PRODUCTION CHANGES AND INCORRECT REFERENCES. IT ALSO CLARIFIES THE PART NUMBERS FOR THE BREAK OUT BOX (BOB) SPECIFIED IN CERTAIN TESTS.

THE FOLLOWING PAGES HAVE BEEN REVISED AS FOLLOWS:

PAGE 6E3-A-4, FIGURE A-2 - PCM WIRING DIAGRAM (1 OF 6) 1. CIRCUIT 480 ORN, TERMINAL J3-18 SPLICED INTO CIRCUIT 480 ORN, TERMINAL J2-03, WAS CHANGED LATE IN PRODUCTION TO CIRCUIT 639 PNK, TERMINAL J3-18 AND SPLICED INTO CIRCUIT 639 PNK, TERMINAL J2-02. THIS CHANGES THE CIRCUIT FROM A KEEP ALIVE MEMORY B+ BATTERY FEED CIRCUIT TO AN IGNITION FEED CIRCUIT.

PAGE 6E3-A-10, FIGURE A-8 - PCM TERMINAL END VIEW (1 OF 2) 1. REFERENCES TO THE BREAK OUT BOX (BOB) PIN #'S ARE INCORRECT. ALL BOB PIN #'S FOR CONNECTOR 1 (J1) BLACK 32 PIN CONNECTOR SHOULD BEGIN WITH A "B" INSTEAD OF AN "A". 2. REVISED ENGINE RUN VOLTAGE FOR PIN # J1-27. REVISED TO INDICATE A RANGE OF 4 TO 6 VOLTS. 3. REVISED KEY "ON" VOLTAGE FOR PIN # J1-28. REVISED TO INDICATE THAT THE RANGE VARIES WITH TEMPERATURE BY INSERTING A (4) AFTER THE INDICATED VOLTAGE. 4. REVISED ENGINE RUN VOLTAGE FOR PIN # J1-28. REVISED TO INDICATE THAT THE RANGE VARIES WITH TEMPERATURE BY INSERTING A (4) AFTER THE INDICATED VOLTAGE.

PAGE 6E3-A-11, FIGURE A-9 - PCM TERMINAL END VIEW (2 OF 2) 1. REFERENCES TO THE BREAK OUT BOX (BOB) PIN #'S ARE INCORRECT. ALL BOB PIN #'S FOR GRAY 32 PIN CONNECTOR 2 (J2) SHOULD BEGIN WITH AN "A" INSTEAD OF A "C". 2. REFERENCES TO THE BREAK OUT BOX (BOB) PIN #'S ARE INCORRECT. ALL BOB PIN #'S FOR BLUE 32 PIN CONNECTOR 3 (J3) SHOULD BEGIN WITH A "C" INSTEAD OF A "B". 3. REVISED KEY "ON" VOLTAGE FOR PIN # J2-17. REVISED TO INDICATE A READING NEAR EITHER 0* OR 11.0 VOLTS. VARIES WITH THE STOPPING POSITION OF THE CAMSHAFT (6). 4. REVISED KEY "ON" VOLTAGE FOR PIN # J2-19. REVISED TO INDICATE 0* VOLTS. WILL INDICATE 5.0 VOLTS IF OIL LEVEL IS LOW (7). 5. REVISED ENGINE RUN VOLTAGE FOR PIN # J2-19. REVISED TO INDICATE 0* VOLTS. WILL INDICATE 5.0 VOLTS IF OIL LEVEL IS LOW (7). 6. REVISED KEY "ON" VOLTAGE FOR PIN # J3-11. REVISED TO INDICATE THAT THE RANGE VARIES WITH TEMPERATURE BY INSERTING A (4) AFTER THE INDICATED VOLTAGE. 7. REVISED ENGINE RUN VOLTAGE FOR PIN # J3-11. REVISED TO INDICATE THAT THE RANGE VARIES WITH TEMPERATURE BY INSERTING A (4) AFTER THE INDICATED VOLTAGE. 8. REVISED KEY "ON" VOLTAGE FOR PIN # J3-16. REVISED TO INDICATE THAT THE RANGE VARIES WITH TEMPERATURE BY INSERTING A (4) AFTER THE INDICATED VOLTAGE. 9. REVISED ENGINE RUN VOLTAGE FOR PIN # J3-16. REVISED TO INDICATE THAT THE RANGE VARIES WITH TEMPERATURE BY INSERTING A (4) AFTER THE INDICATED VOLTAGE. 10. REVISED KEY "ON" VOLTAGE FOR PIN # J3-21. REVISED TO INDICATE B+. 11. ADD THE STATEMENT, (6) VARIES FROM 0* TO 11.0 VOLTS DEPENDING ON POSITION OF CAMSHAFT, TO THE FOOTNOTE PORTION OF THE CHART. 12. ADD THE STATEMENT, (7) 5.0 VOLTS WHEN THE OIL LEVEL IS "LOW", TO THE FOOTNOTE PORTION OF THE CHART. 13. REVISED INCORRECT FOOTNOTE "USE KENT-MOORE BREAKOUT BOX J 39700 WITH J 39700-100 ADAPTER CABLES AND J 39700-112 OVERLAY" TO READ "USE KENT-MOORE BREAKOUT BOX J 39700 WITH J 39700-110 ADAPTER CABLES AND J 39700-112 OVERLAY".

PAGE 6E3-A-27, ON-BOARD DIAGNOSTIC (OBD) CIRCUIT CHECK 1. CIRCUIT 480 ORN, TERMINAL J3-18 SLICED INTO CIRCUIT 480 ORN, TERMINAL J2-03, WAS CHANGED LATE IN PRODUCTION TO CIRCUIT 639 PNK, TERMINAL J3-18 AND SPLICED INTO CIRCUIT 639 PNK, TERMINAL J2-02. THIS CHANGES THE CIRCUIT FROM A KEEP ALIVE MEMORY B+ BATTERY FEED CIRCUIT TO AN IGNITION FEED CIRCUIT. 2. REVISED 10 AMP IGNITION PCM FUSE CONNECTED TO TERMINAL J2-02, TO 10 AMP PCM/IGN FUSE.

PAGE 6E3-A-30, CHART A-1 - NO MALFUNCTION INDICATOR (MIL) LAMP 1. CIRCUIT 480 ORN, TERMINAL J3-18 SLICED INTO CIRCUIT 480 ORN, TERMINAL J2-03, WAS CHANGED LATE IN PRODUCTION TO CIRCUIT 639 PNK, TERMINAL J3-18 AND SPLICED INTO CIRCUIT 639 PNK, TERMINAL J2-02. THIS CHANGES THE CIRCUIT FROM A KEEP ALIVE MEMORY B+ BATTERY FEED CIRCUIT TO AN IGNITION FEED CIRCUIT. 2. REVISED 10 AMP IGNITION PCM FUSE CONNECTED TO TERMINAL J2-02, TO 10 AMP PCM/IGN FUSE.

PAGE 6E3-A-31, CHART A-1 - NO MALFUNCTION INDICATOR (MIL) LAMP 1. REVISED THE STEP 4 ACTION TO CLARIFY THE MAXI FUSE AS THE PCM (KEEP ALIVE MEMORY B+) FUSE LOCATED IN THE RELAY CENTER. 2. REVISED THE STEP 5 ACTION TO CLARIFY THE MIL CIRCUIT AS THE MIL CONTROL CIRCUIT AND IGNITION FEED AS THE IGNITION FEED CIRCUIT. 3. REVISED THE STEP 7 ACTION TO CLARIFY THE BATTERY FEED CIRCUIT AS THE KEEP ALIVE MEMORY B+ CIRCUIT. 4. REVISED THE STEP 9 ACTION TO CLARIFY THE BATTERY FEED CIRCUIT AS THE KEEP ALIVE MEMORY B+ CIRCUIT. 5. REVISED THE STEP 10 ACTION TO CLARIFY THE BATTERY CIRCUIT AS THE KEEP ALIVE MEMORY B+ CIRCUIT. 6. REVISED THE STEP 11 ACTION AND NO COLUMNS TO CORRECTLY ROUTE THE TECHNICIAN TO THE CORRECT REPAIR.

PAGE 6E3-A-32, CHART A-2- MALFUNCTION INDICATOR LAMP (MIL) "ON" STEADY 1. CIRCUIT 480 ORN, TERMINAL J3-18 SLICED INTO CIRCUIT 480 ORN, TERMINAL J2-03, WAS CHANGED LATE IN PRODUCTION TO CIRCUIT 639 PNK, TERMINAL J3-18 AND SPLICED INTO CIRCUIT 639 PNK, TERMINAL J2-02. THIS CHANGES THE CIRCUIT FROM A KEEP ALIVE MEMORY B+ BATTERY FEED CIRCUIT TO AN IGNITION FEED CIRCUIT. 2. REVISED 10 AMP IGNITION PCM FUSE CONNECTED TO TERMINAL J2-02, TO 10 AMP PCM/IGN FUSE.

WHEN A SERVICE PROCEDURE REQUIRES INSTALLING BREAK OUT BOX (BOB) J 39700, THE TEST DESCRIPTION REFERS TO THE PCM TERMINAL END VIEW FOR VOLTAGE REDINGS. THE ADAPTER AND OVERLAY NUMBERS REQUIRED FOR USE WITH THE BOB ARE LISTED AT THE BOTTOM THE PCM TERMIAL END VIEWS. THE STATEMENT AT THE BOTTOM OF THE PCM TERMINAL END VIEW READS "USE KENT-MOORE BREAK OUT BOX (BOB) J 39700 WITH J39700-110 ADAPTER CABLES AND J 39700-112 OVERLAY".

FIGURES: 00 ATTACHMENTS: 05

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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