Grand AM L4-138 2.3L DOHC VIN D MFI (1994)
Serial Data: Initial Inspection and Diagnostic Overview
System Check
*** THIS ARTICLE INCLUDES UPDATES MADE BY TSB #438113A DATED DECEMBER 1994
SYSTEM CHECK
System Check
Troubleshooting Hints
*** THIS ARTICLE INCLUDES UPDATES MADE BY TSB #438113A DATED DECEMBER 1994
TROUBLESHOOTING HINTS (Perform before beginning System Diagnosis)
Make the following checks before beginning system diagnosis.
1. If the Powertrain Control Module and Electronic Brake Control Module are not accessible with a scan tool, check for an open in CKT 800
between DLC terminal "M" and S277.
2. If a single component is not accessible with a scan tool, check for an open in the following:
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Powertrain Control Module - CKT 800 between S277 and component.
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Electronic Brake Control Module - CKT 800 between S277 and component.
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Diagnostic Energy Reserve Module - CKT 1061 between DLC terminal "L" and component.
If the wires are OK. refer
Testing and Inspection See: Testing and Inspectionfor PCM diagnosis. Antilock Brake System for ABS diagnosis.
See: Brakes and Traction Control/Antilock Brakes / Traction Control SystemsAnd Air Bags (Supplemental Restraint Systems) See: Restraint
Systems/Air Bag Systemsfor SIR diagnosis.
3. Check that all connectors in system are mated correctly.
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Check for a broken (or partially broken) wire inside of the insulation which could cause system failure to prove "GOOD" in a continuity
voltage check refer to
Diagrams/Diagnostic Aids/General Troubleshooting Procedures. See: Diagrams/Diagnostic Aids
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Check for proper installation of aftermarket electronic equipment which may affect the integrity of their systems. refer to
Diagrams/Diagnostic Aids/General Troubleshooting Procedures. See: Diagrams/Diagnostic Aids
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Refer to System Diagnosis. See: Component Tests and General Diagnostics/System Diagnosis
