Disabling The Hybrid Electric Vehicle (Hev) System - freightliner WALK-IN VAN CHASSIS Operator's Manual

fifth range. As the vehicle slows, the transmission will
downshift automatically.
When going downhill, downshift to a lower transmis-
sion range to increase engine braking and to help
maintain control. During downhill operation, the trans-
mission may upshift to the next higher range, if the
engine is exceeding its governed speed in the lower
range.
H (Hold)
This hold position on the T-handle shifter holds the
transmission in the current gear.
1 (Low Gear)
Use first range when pulling through mud or deep
snow, when maneuvering in tight spaces, or when
driving up or down very steep grades. First range
provides the vehicle with its maximum driving torque
and maximum engine braking effect.
Disabling the Hybrid Electric
Vehicle (HEV) System
The following information describes the three meth-
ods to disable the HEV system.
Option 1 (preferred method)
Turn off the ignition, or if equipped with an ignition
reader, press the red button on the ignition pad. See
Fig. 9.3.
•
The engine will shut down.
•
The dash lights will shut down.
•
The HEV system will shut down.
•
The HEV batteries are still active, but are iso-
lated in the Power Electronics Carrier (PEC).
Option 2
Disconnect the low-voltage (12 volt) vehicle batteries.
See Fig. 9.6.
•
The engine will shut down.
•
The HEV system will shut down.
•
The HEV batteries are still active, but are iso-
lated in the Power Electronics Carrier.
Hybrid Electric Vehicle
2
1
05/26/2006
1. Passenger Steps
Fig. 9.6, Battery Location
Option 3
Push in the service switch in the Power Electronics
Carrier and shut down the engine. See
04/22/2009
Fig. 9.7, Service Switch
IMPORTANT: The red service switch on the
PEC should only be used for an emergency
shutdown or when the service manual or
troubleshooting guide directs the Hybrid-Trained
Technician to perform work on the high- voltage
system.
•
Hybrid system will be disabled
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2. Ground Cable
Fig. 9.7.
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9.4