OPERATOR'S MANUAL MAINTENANCE

Table Of Contents
Section C - Electrics
Basic System Operation
Air Filter Blocked Warning
C-84 C-84
9803/9880-3
Air Filter Blocked Warning
Operation
C005690GB-2
Fig 78.
A pressure switch is fitted to the engine air filter. When the
filter is blocked the pressure increases, thus triggering the
switch and the ECU1 i/p 11 (A-7) is connected to ground.
This causes the EMS to alarm. The buzzer sounds for 1.5
seconds, a "AIR FILTER" message is displayed on the
EMS and a flashing engine air filter blocked LED
illuminates for 5 seconds. This is followed by a repetitive
message and constant LED on.