1992 Saturn SL2 AutomaticFACTORY OEM SERVICE PROCEDURE

General Motors A & C Chart Reference

GENERAL MOTORS A & C CHART REFERENCE

System or Component Location Diagnostic Information
A-1 & A-2 SERVICE ENGINE SOON Light See DIAGNOSTIC CIRCUIT CHECK CHECK in this article
A-3 No Start See NO START - ENGINE CRANKS OK in this article
A-5 Fuel Pump Relay See RELAYS, SOLENOIDS & MOTORS in I - SYS/COMP TESTS article
A-7 Fuel System Diagnosis See BASIC FUEL SYSTEM CHECKS in this article
C-1 ECM/PCM Replacement Check See ECM REPLACEMENT CHECK in this article
C-1 MAP Sensor See ENGINE SENSORS & SWITCHES in I - SYS/COMP TESTS
C-1 Power Steering Pressure Switch See ENGINE SENSORS & SWITCHES in I - SYS/COMP TESTS
C-1 Park/Neutral Switch See ENGINE SENSORS & SWITCHES in I - SYS/COMP TESTS
C-2 Injector Balance Test See FUEL SYSTEM in I - SYS/COMP TESTS
C-2 IAC Motor See IDLE CONTROL SYSTEM in I - SYS/COMP TESTS
C-2 ISC Motor See IDLE CONTROL SYSTEM in I - SYS/COMP TESTS
C-3 Canister Purge Sys (Fuel Evap Ctrl) See EMISSION SYSTEMS & SUB- SYSTEMS in I - SYS/COMP TESTS
C-4 EST Ignition Check See BASIC IGNITION SYSTEM CHECKS in this article
C-5 ESC Ignition Check See IGNITION SYSTEM in I - SYS/COMP TESTS
C-6 Air Injection System See EMISSION SYSTEMS & SUB- SYSTEMS in I - SYS/COMP TESTS
C-7 EGR System See EMISSION SYSTEMS & SUB- SYSTEMS in I - SYS/COMP TESTS
C-8 Torque Converter Clutch (Trans) See MISCELLANEOUS ECM CONTROLS in I - SYS/COMP TESTS
C-8 M/T Shift Lights (Trans) See MISCELLANEOUS ECM CONTROLS in I - SYS/COMP TESTS
C-10 A/C Clutch Control See MISCELLANEOUS ECM CONTROL in I - SYS/COMP TESTS
C-12 Electric Cooling Fan Control See MISCELLANEOUS ECM CONTROL in I - SYS/COMP TESTS
C-18 Supercharger Boost Control See AIR INDUCTION SYSTEMS in I - SYS/COMP TESTS
NOTE: Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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