Caution: Before checking the idle speed, make sure the spark plugs, fuel injectors, idle speed modulator (ISC), compression, etc. are in order.
Verification conditions
- The engine must be warmed up to a coolant temperature of 80–95°C.
- Headlights, parking lights, radiator fan and all electrical consumers must be switched off.
- The gearbox must be set to neutral position.
- The steering wheel must be set to point straight ahead.
Procedure
1. Connect a tachometer to the primary winding of the ignition coil or a scanner to the diagnostic connector.
2. Start the engine and let it run at idle speed.
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3. Increase the crankshaft speed to 2000–3000 min⁻¹ for no more than 5 s, then let it idle for 2 min.
4. Use the tachometer to determine the idle speed.
Idle speed:
- 1.6L Engine: 850±100 min⁻¹
- 1.8 and 2.0L engines: 700±100 min⁻¹