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.