Note. Before checking the idle speed, check the following points:
- - malfunction indicator (MIL) does not light up and there are no DTCs in the system;
- - ignition timing;
- - spark plug;
- - air filter;
- - forced crankcase ventilation system PCV;
- - headlights off.
1. Disconnect the EVAP canister purge valve connector (EVAP).
2. Connect the HDS to the data link connector DLC, located on the driver's side under the control panel.
3. Start the engine. Keep the engine speed at 3,000 rpm. (min-1) without load (in the neutral position of the manual gearbox) until the radiator fan turns on and let it idle.
4. Check the speed under the condition of no load: headlights, air conditioning fan, radiator cooling fan and air conditioner are turned off.
The rotation frequency should be equal to: 700±50 rpm (min-1).
5. Let the engine idle for about 1 minute with a high electrical load (turn on the air conditioner, set the temperature to the temperature «maximum cold», the heater fan is in position «High» and turn on the headlights).
The rotation frequency should be equal to: 850±50 rpm (min-1).
Note. If engine idle speed is not within acceptable standards, perform ECM Idle Diagnostics (ECM idle learn procedure). If the idle speed is out of specification, refer to symptom troubleshooting.
6. Reconnect the EVAP canister purge valve.