Maximum and Minimum Advance Angle Control


When there is trouble with the predetermined ignition timing from the initial ignition timing, basic ignition advance angle and corrective ignition advance angle, it will affect the engine performance harmfully. To prevent this, the engine ECU controls the actual ignition angle (ignition timing) to make the total for the basic ignition advance angle and corrective ignition advance angle more or less than the determined value.
Ignition Timing Inspection
The ignition timing angle set during ignition timing adjustment/ inspection is called the “standard ignition timing”. The standard ignition timing consists of the initial ignition timing and the fixed ignition advance angle*. *The fixed ignition advance angle is the value that is output during ignition timing adjustment that is stored in the engine ECU and that is unrelated to the correction used during normal driving. The ignition timing adjustment/inspection are conducted as follows. Make a short between the DLC1 (Data Link Connector 1), DLC2, or DLC3 TE1 (TC)-E1 (CG) terminals, and set the standard ignition timing. The standard ignition timing differs by model as shown in the table at left, so when making this adjustment, refer to the appropriate Repair Manual. When the standard ignition timing is not suitable, adjustment is required.
When the IDL signal is off, even if there is a short between the TE1 (TC) and E1 (CG) terminals, the ignition timing cannot be set.
For recent models, the ignition timing cannot be adjusted because sensors for the G and NE signals are fixed to the engine.

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