| Diagnosis | Starters | ||
| Driveability/engine performance | Electrical wiring | ||
| Electronic ignition | Charging systems | ||
| Computer control system | Dash contols & instruments |
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| Emission control systems | Climate control | ||
| Maintenance tune-ups | Heater & a/c controls | ||
| Alternators | Battery/warning lights | ||
| Check engine lights | Lighting system |