SERVICE MANUAL UPDATE SEC. 8A CELL 81 VEHICLE SPEED INPUT
MODELS/YEARS 1988-90 CUTLASS SUPREME
Cell 81 Vehicle Speed Input-Short Circuit
The following pages (8A-81-34 and 8A-81-35) are replacement pages for the 1988 Cutlass Supreme Service Manual.
Cell 81 Vehicle Speed Input-Short Circuit
The following pages (8A-81-34 and 8A-81-35) are replacement pages for the 1989 and 1990 Cutlass Supreme Service Manual.
Please update your Manuals.
CODE 1009 VEHICLE SPEED INPUT-SHORT CIRCUIT
Code 1009 will set if the Ignition is in RUN and the serial data link speed is 5 MPH or greater than the vehicle speed input for 5 seconds and the Vehicle Speed Input at the Electronic Instrument Cluster is LO.
TEST EXPLANATIONS
The circled numbers refer to the test procedures in the trouble tree.
1 This step checks if a short to ground exists in CKT 389 or the Electronic Instrument Cluster is at fault.
2 This step determines if the short exists in the Cruise Control Module.
3 This step determines if the short exists in the Chime Module.
4 This step determines if the short exists in the Electronic Control Module or in CKT 389.
CODE 1009 VEHICLE SPEED INPUT-SHORT CIRCUIT
Code 1009 will set if the Ignition is in RUN and the serial data link speed is 5 MPH or greater than the vehicle speed input for 5 seconds and the Vehicle Speed Input at the Electronic Instrument Cluster is LO.
TEST EXPLANATIONS
The circled numbers refer to the test procedures in the trouble tree.
1 This step checks if a short to ground exists in CKT 389 or the Electronic Instrument Cluster is at fault.
2 This step determines if the short exists in the Passive Restraint Control Module, Cruise Control Module, HUD Unit, Chime Module or Driver Information Center.
3 This step determines if the short exists in the Electronic Control Module or in CKT 389.
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.
