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April 2019
– Issue 4
Page
38
of
48
Section 7 - Trouble Shooting
NOTE - Engine:
Please refer to OEM Engine Manuals
NOTE
–
Transmission:
Please refer to OEM Transmission Manuals
NOTE
– For models using an OEM chassis (e.g. Scania / MAN/ Mercedes). Please refer to OEM manuals.
7A – Chassis:
7A.1 – Engine / transmission
Fault
Possible causes
Trouble shooting
Not selecting a
gear – Automatic
transmissions
Ensure foot is depressed firmly enough on the
brake pedal before selecting a gear
Reselect neutral and then depress foot brake
firmly before selecting a gear
Foot brake switch has failed – Switch is located
above the spare wheel below driver’s position
Replace brake switch
Some new generation Allison ‘Gen 5’
transmissions have a ‘forced neutral’ programmed
as standard, which automatically selects neutral
when the park brake is applied whilst the vehicle
is in gear.
Release the park brake and select a gear with
the foot firmly applied.
Engine not starting
Rear engine door not closed firmly
Ensure rear engine door is fully closed and the
door warning light on dash for ‘open rear door is
no longer illuminated
Vehicle in gear
Select neutral on transmission control selector
Bus isolator switch has not been turned back on
Turn on bus isolator switch
Red engine safety isolator switch in engine bay is
in the ‘on’ position
Turn safety switch back to ‘off’ position
Battery terminals loose
Check battery terminals are secure
Batteries have no charge
Charge or replace batteries
Failed starter solenoid
Replace starter circuit solenoid
Loose earth strap from engine to chassis
Ensure earth strap is secure and has good
connection
Green engine light
on dash –
maintenance level
event
Possible adblue / urea tank empty.
Water in fuel.
Failed real time clock battery for ECM.
Check adblue / urea tank is not empty, and refill
if necessary. May need to have adblue system
reset, if fluid has run-out. Contact your BCI
Dealer for guidance should you require
assistance.
Owner’s Manual