BENDIX Intellipark Service Data page 12

The Bendix Intellipark
®
(EPB) system also provides a method to enter and exit
vehicle maintenance mode without using the Bendix
ACom Diagnostic Software. Entry is accomplished
®
by using a predefined sequence of inputs that is
sufficiently unique to prevent accidental entry, and
sufficiently inconvenient to discourage inappropriate
use of the mode, while still allowing access to the
mode for emergency conditions or at remote locations.
Entry to the vehicle maintenance mode via the switch
pattern shall only be possible when all preconditions
are met.
Battery voltage is normal
»
Ignition key is on
»
Vehicle speed is < 4 mph (6 kph)
»
After successfully meeting the preconditions, the below
pattern will put the vehicle into maintenance mode:
1. Release the park brakes (if the desired state is
RELEASED while the system is in maintenance
mode).
2. Verify that the vehicle is stationary, the ignition
key is ON, and the Dash Electronic Control Unit
(DECU) switches are in the neutral position.
NOTE: The next steps should be performed within 10
seconds.
3. Press the foot brake pedal.
4. Release the foot brake pedal.
5. Push the yellow button and hold it in the pushed
state continuously (until the end of step 15).
6. Press the foot brake pedal and keep it pressed
(until the end of step 15).
NOTE: The next steps should be performed within 40
seconds.
7. Cycle the ignition key from fully ON to fully OFF
three times.
» ON > OFF > ON > OFF > ON > OFF
8. Keep the ignition switch in the OFF position for at
least two seconds.
9. Cycle the ignition key from OFF to ON three times.
» OFF > ON > OFF > ON > OFF > ON
10. Keep the ignition switch in the ON position for at
least two seconds.
12
Electronic Parking Brake
®
11. Cycle the ignition key from ON to OFF three times.
» ON > OFF > ON > OFF > ON > OFF
®
12. Keep the ignition switch in the OFF position for at
least two seconds.
13. Cycle the ignition key from OFF to ON three times.
» OFF > ON > OFF > ON > OFF > ON
14. Keep the ignition switch in the ON position for at
least two seconds.
15. Verify that the diagnostic LEDs start to blink in the
special pattern.
• Bobtail Mode: When the towed unit channel of the
Intellipark EPB system is evacuated, the two red LED
displays on the trailer air supply (red) switch will be
illuminated. This is a normal operation scenario for
vehicles that are equipped for towing but are used
without a trailer (bobtail). Bobtail mode gives the driver
the ability to extinguish the two red LED displays on the
trailer air supply switch when driving bobtail.
The following conditions must be met to enter the
bobtail mode:
The driver must release the tractor (power vehicle)
»
park brakes.
The vehicle must be below a configurable speed.
»
The Park Valve Module (PVM) trailer (towed
»
vehicle) pressure sensor reading must be below
a configurable pressure.
The driver must pull and hold the red trailer air
»
supply switch for a minimum of three seconds.
The DECU will exit the bobtail mode when any of the
following conditions are met:
The vehicle ignition power is removed and
»
re-applied.
The driver applies the tractor (power vehicle) park
»
brakes.
The vehicle experiences a Rollaway Mitigation
»
event.
A Diagnostic Trouble Code (DTC) occurs that
»
inhibits Bobtail Mode.