Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1993CAVALIER Z24, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - BASIC TESTINGA & C CHART REFERENCE
1993 Chevrolet Cavalier Z24, 2D Coupe, Automatic
A & C Chart Reference
1993 Chevrolet Cavalier Z24, 2D Coupe, AutomaticSECTION A & C Chart Reference
NOTE:
The following table provides the location of commonly used diagnostic information. These former "A" and "C" charts are now written in text and inserted into the appropriate location in the new Engine Performance workflow. To familiarize yourself with the Engine Performance workflow, see AA - USING THIS SECTION (GENERAL HELP INFORMATION) article in this section.
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 (1) | ||||
| C-12 Electric Cooling Fan Control | See MISCELLANEOUS ECM CONTROL in I - SYS/COMP TESTS (2) | ||||
| C-18 Supercharger Boost Control | See AIR INDUCTION SYSTEMS in I - SYS/COMP TESTS | ||||
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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.