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Operator ’ s Manual
from Mack Truck Electronic V-MAC IV Vehicle Management & Control with Co-Pilot Display Operator’s Manual
This section explains the procedure reset the low idle speed using the Speed Control switches.
The vehicle management and control - MAC) system allows the low idle set within the range 550 700 RPM RPM for non - catalyzed exhaust aftertreatment system). This provides flexibility set the low idle the smoothest engine speed for the vehicle.
There are two steps required reset the low idle speed. The first step places the vehicle management and control - MAC) system into the low - idle adjust mode. this mode, vehicle management and control - MAC) ready accept the new idle speed.
The second step actually tell vehicle management and control - MAC) what the new idle speed will
The first phase the process meeting the requirements listed below
1 The vehicle management and control - MAC) system must have the Low - Idle Adjust option enabled the customer data space. This function can disabled the customer .
2 sure there are active faults the
3 The vehicle must stationary .
4 The parking brake must
5 The accelerator pedal (AP) must the idle position (not pressed).
6 The Speed Control ON/OFF switch must turned and OFF 3 times within two this the idle speed will drop 550 and vehicle management and control - MAC) will now ready accept a new speed. sure leave the ignition key the position. C0035366
Figur e Speed Contr Switches
Note: the idle speed does not drop 550 RPM after meeting the requirements listed, there may other possible problems which will not allow the idle
Refer the vehicle management and control - MAC) Service Manual for troubleshooting procedures.
T o complete the resetting the idle speed, continue follows:
1 Depress and hold the accelerator pedal until the desired engine speed
2 Use the speed control switches adjust idle speed.
3 Depress and release the clutch pedal store idle
This speed now locked into vehicle management and control - MAC) the low idle speed.
Note: T o detect a drop when resetting the recommended that the low idle speed set a speed greater than 500 RPM.
Smart Idle Elevated Idle RPM T ime
This feature will discontinue a ramp for a period time when the engine speed (RPM) reaches its tar get. The range time can set between 0 and 1092 minutes, with a default setting minutes.