P-508 Low Boost Pressure Warning
Usage:
System Operation
Low Boost Pressure Diagnostic Lamp
The Low Boost Pressure Diagnostic is used to indicate low engine boost pressure status.
On power up (key ON, Engine OFF), the lamp comes on for five seconds, then goes out unless the low boost pressure condition is present. The ECM can sink 300 mAmp current to drive a lamp or a buzzer.
Schematic
Functional Test
Caterpillar Information System:
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