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IGNITION TIMING CHECK
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicles Communication Interface (V.C.I.)
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
1. Before inspection, set the vehicle to the pre-inspection condition.
2.
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Turn the ignition switch to the "LOCK" (OFF) position and then connect scan tool (M.U.T.-III) to the data link connector [Refer to GROUP 13A - Diagnostic Function, How to Connect the Scan Tool (M.U.T.-III) ].
3. Set the timing light to the power supply line (terminal number 3) of the ignition coil number 1.
noteThe power supply line is looped and also longer than the other ones.
4. Start the engine and let it run at idle.
5. Select the item number 2 on scan tool (M.U.T.-III) and measure engine idle speed and check that it is approximately 700 r/min <M/T> or 750 r/min <CVT>.
6. Select number 11 (actuator test function) of the scan tool (M.U.T.-III), and set the ignition timing to the basic ignition timing.
7. Check that basic ignition timing is within the standard value.
Standard value: 5° BTDC ± 3°
8. If the basic ignition timing is outside the standard value, inspect the MFI system (Refer to GROUP 13A - Diagnosis, Symptom Chart ).
cautionIf the test is not cancelled, a forced driving will continue for 27 minutes. Driving under this condition may damage the engine.
9. Cancel the actuator test function item number 11, Basic ignition timing set mode, on scan tool (M.U.T.-III)
10. Check that ignition timing is at the standard value.
Standard value: Approximately 8° BTDC
11. Remove the timing light.
12. Turn the ignition switch to the "LOCK" (OFF) position and then disconnect the scan tool (M.U.T.-III).