2. Turn off the ignition and connect the tester to the 16-pin diagnostic connector under the instrument panel.
3. Install the strobe light.
Note: For GDI engine, connect the timing light to the ignition coil power line of cylinder #1 (terminal "1").
GDI engine.
4. Start the engine and let it idle.
5. Check that the idle speed corresponds to the nominal value (see section "Checking the idle speed").
6. Select the settings on the tester (subparagraph No.17 of the Actuator test item for MUT-II) corresponding to the setting of the basic ignition timing angle.
Note: For GDI engine, at this point the engine speed will be 700 rpm (4G15) or 750 rpm (4G93).
7. Check the value of the base ignition advance angle, which should be within the specified limits.
Nominal value...5+3°before TDC 8. If the basic ignition timing angle does not correspond to the nominal value, then perform troubleshooting and check the fuel injection system components (see the relevant chapter).
9. Press the reset button on the tester (the "Clear" button for MUT-II) to disable the basic advance angle mode (Actuator Test mode for MUT-II). Note: if this is not done, the forced control mode of the device will be maintained for 27 minutes. Driving the car under these conditions may cause engine damage.
10. Check that the ignition timing angle corresponds to the nominal value.
Nominal value: (approximately)
- GDI Engine - 20° BTDC
- Engine 4G15-MPI - 10° BTDC
- Engine 4G93-MPI - 8° BTDC
Note:
- Even under normal engine operation, the ignition timing angle varies within ±7°.
- As the altitude increases, the ignition timing angle is automatically increased by approximately 5° from the nominal value.
- For a GDI engine, after 4 minutes or more after the base advance mode is turned off, the spark advance angle will be approximately 5° BTDC.
11. Disconnect the strobe light.
12. Turn off the ignition and disconnect the tester.