SYSTEM / Control System Auto-Idle Control Purpose: Reduces the engine speed when all the control levers are in neutral in order to re- duce fuel consumption and noise level. Operation: 1. When the following conditions exist and approx. 3.5 seconds after the control lever is turned to neutral, MC sends the signals equivalent to the auto-idle speed to ECM by using CAN communi- cation. 2. ECM changes the engine speed into the auto-idle speed. 3. As soon as either control lever is moved (pres- sure sensor: ON), MC returns the signals sending to ECM into those equivalent to the target engine speed set by the engine control dial. 4. ECM returns the engine speed into the original engine speed.
Condition: Engine Control Dial: Set the engine speed at 1030 min -1 or faster. Auto-Idle Switch: ON Auto-Idle Deactivation Requirements: Control Lever: Operated (pressure sensor: ON) Power Mode Switch: When the E mode is changed to P mode or P mode is changed to E mode Engine Control Dial: When the engine speed is changed Engine Speed Engine speed is reduced to the auto-idle speed after 3.5 seconds. Fast Idle 1030 min -1 Auto-Idle Speed Slow Idle Engine Con- trol Dial Posi- tion Slow Idle Fast Idle NOTE: Auto-idle speed can be adjusted by Dr. ZX. T2-2-14