Cutlass Ciera Cruiser V6-3100 3.1L MFI VIN M (1994)
Serial Data: Initial Inspection and Diagnostic Overview
ECM DATA LINE
1. If all components are not accessible with a scan tool, check for an open in CKT 461 between DLC terminal "M" and S215.
2. If a single component is not accessible with a scan tool, check for an open in CKT 461 between S215 and the component. If the wire is OK, refer
to:
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Computers and Control System for Computer diagnosis. See:
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Brakes for ABS diagnosis. See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems
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Heating and Air Conditioning for Heater and A/C Control Assembly diagnosis. See: Heating and Air Conditioning
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Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a
continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be
checked by monitoring for a voltage drop with the system operational (under load).
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Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (Refer to General
Troubleshooting Procedures). See: Diagrams/Diagnostic Aids
