| A/C compressor relay OFF | 12 | A/C compressor clutch relay | A/C compressor clutch relay turns OFF. | Ignition switch: "ON" | Sound of operation cannot be heard. |
| A/C compressor relay ON | 11 | A/C compressor clutch relay turns from OFF to ON. | Clicks when A/C compressor clutch is driven. |
| Cooling fan OFF | 8 | Radiator fan, A/C condenser fan | Stop the fan motor. | Ignition switch: "ON" | Radiator fan and A/C condenser fan stop. |
| Cooling fan ON | 7 | Drive the fan motor. | Radiator fan and A/C condenser fan rotate. |
| Evaporative emission purge solenoid OFF | 5 | Evaporative emission purge solenoid | Solenoid valve turns OFF. | Ignition switch: "ON" | Sound of operation cannot be heard. |
| Evaporative emission purge solenoid ON | 4 | Solenoid valve turns from OFF to ON. | Clicks when solenoid valve is driven. |
| Evaporative emission ventilation solenoid OFF | 10 | Evaporative emission ventilation solenoid | Solenoid valve turns OFF. | Ignition switch: "ON" | Sound of operation cannot be heard. |
| Evaporative emission ventilation solenoid ON | 9 | Solenoid valve turns from OFF to ON. | Clicks when solenoid valve is driven. |
| Fuel pump OFF | 3 | Fuel pump | Stop driving the fuel pump and stop fuel circulation | Ignition switch: "ON" | Listen near the fuel tank for the sound of fuel pump operation. | Sound of operation cannot be heard. |
| Fuel pump ON | 2 | Fuel pump operates and fuel is recirculated. | Sound of operation is heard. |
| Ignition timing 5 BTDC | 6* | Basic ignition timing | Set to ignition timing adjustment mode. | - Engine: idling
- Connect timing light
| 5°BTDC |
| Injector stop | 1 | Injectors | Specified injector is stopped. | Engine: warm up, idle. (cut the fuel supply to each injector in turn and check cylinders which don't affect idling) | Idle condition is changed by stopping selected cylinder: this can cause an unstable condition and the engine may stall. |
| Oil feeder control valve OFF | 14 | Intake engine oil control valve, Exhaust engine oil control valve | Intake engine oil control valve and exhaust engine oil control valve turns OFF. | Ignition switch: ON | Sound of operation cannot be heard. |
| Oil feeder control valve ON | 13 | Switch the intake engine oil control valve and exhaust engine oil control valve from OFF to ON. | When the valve is actuated, operating noise is audible. |
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