Stopping The Engine; Multiplex Bypass Circuit; Rear Junction Box; Bypass Switch - MCi J4500 Operator's Manual

applied. Watch gauges and telltales. If abnormalities
arise, stop engine and find cause.

Stopping the Engine

1. Bring coach to a complete stop.
2. Place the transmission in Neutral.
3. Apply the parking brake.
4. Idle the engine at low rpm for 30 seconds, then
turn the ignition OFF.
Regeneration Switch
The regeneration toggle switch is located in the
rear, side service compartment.
Figure 49. Regen switch
To avoid serious personal injury or property
damage, ensure that no persons or objects
are at or within two feet of the exhaust outlet
at any time during a regeneration.
Ensure that exhaust and outlet are clear of
any trash, grasses, or other vegetation or Use
extreme caution during a stationary
regeneration, as exhaust gas tail pipe outlet
temperatures can exceed 900 degrees F (482
degrees C).
Stationary regenerations are to be performed
outdoors only.
DO NOT perform inside a garage or
maintenance facility. DO NOT attach an
exhaust extraction hose to the exhaust outlet.
40
Shutting down the engine from high idle can
damage the turbine bearings.

Multiplex Bypass Circuit

If the engine cranks but does not start because the
ignition module fails, the engine ignition bypass switch,
located in the rear junction box, provides emergency
power to start the engine.
In this mode, the coach should be driven straight
to a service facility
1. Open the rear junction box compartment door
(roadside, baggage bay compartment #3) ( Figure 50 ).
Locate the engine bypass switch on the side panel of
the junction box ( Figure 51 ).
Figure 50. Rear junction box
Figure 51. Bypass Switch
2. Lift the red self-canceling cover and position the
toggle switch ON.
3. Get service assistance as soon as possible.
June 2016