The ignition timing is preset and is not adjustable.
These engines utilize a Distributorless Ignition System (DIS). On this system, ignition coil packs fire the spark plugs directly through the spark plug wires. All spark timing and advance is determined by the ignition control module and engine control computer. No ignition timing adjustments are necessary or possible.
The ignition timing is preset to 10 degrees Before Top Dead Center (BTDC) and is not adjustable.