SMU - SEC. 6A/6A1 - DRIVE MOTOR CONTROLS. Chevrolet S10

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6A/6A1 - DRIVE MOTOR CONTROLS AND BATTERY PACK CONTROLS - REVISED CONTROL MODULE PROGRAMMING

MODELS: 1997-98 CHEVROLET E1 TRUCK WITH 85 KW ELECTRIC MOTOR (VIN H - RPO LN1)

THIS BULLETIN IS BEING ISSUED TO REVISE THE CONTROL MODULE PROGRAMMING (TEXT INFORMATION ONLY) IN SECTION 6A/6A1 OF THE SERVICE MANUAL.

AFTER REPLACEMENT OF THE BATTERY PACK CONTROL MODULE OR THE POWER INVERTER MODULE, IT IS NECESSARY TO PROGRAM THE REPLACEMENT CONTROL MODULE.

REPROGRAMMING THE BATTERY PACK CONTROL MODULE WILL EFFECT THE LEARNED STATE OF CHARGE (SOC) VALUE THAT IS SHARED WITH THE DRIVE MOTOR CONTROL MODULE AND THE STATE OF CHARGE GAUGE ON THE DASH. IN ORDER FOR THE BATTERY PACK CONTROL MODULE TO RELEARN THE SOC, THE KEY SHOULD BE CYCLED TWICE IMMEDIATELY AFTER PROGRAMMING/FLASHING. THE BATTERY PACK MUST THEN BE CHARGED TO COMPLETION.

THE DRIVE MOTOR CONTROL MODULE IS INTERNAL TO THE POWER INVERTER MODULE AND IS NOT ACCESSIBLE. AFTER REPLACEMENT OF THE POWER INVERTER MODULE, THE DRIVE MOTOR CONTROL MODULE MUST BE PROGRAMMED.

THE SERVICE PROGRAMMING SYSTEM (SPS) WILL NOT ALLOW INCORRECT SOFTWARE PROGRAMMING OR INCORRECT CALIBRATION CHANGES. FOR INSTRUCTION AND INFORMATION ON THIS PROCEDURE, REFER TO THE LATEST TECHLINE INFORMATION ON RE-PROGRAMMING OR FLASHING PROCEDURES.

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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.