17730-310
23
Troubleshooting Guide
OPTIMAAX
®
Lift Axle System Air Controller Module for Freightliner
OPTIMAAX LIFT AXLE SYSTEM – ELECTRONIC COMPONENTS
TROUBLESHOOTING GUIDE
FAULT CODES
PRIMARY CONDITION
SECONDARY
CONDITION
POSSIBLE CAUSE
CORRECTION
OPTIMAAX warning
light is illuminated
Vehicle is overloaded
Reduce vehicle load
OPTIMAAX warning
light is flashing
Axle will not
retract
Fault detected . Mechanical
issue prevents lift axle from
deploying .
Connect Diagnostic Tool software for detailed
diagnosis . Refer to Hendrickson Literature No .
17730-309 to diagnosis mechanical issue .
Drive Pressure Sensor
Fault (P1)
Wiring harness is damaged
or connected incorrectly
Check wiring harness, replace if needed
Manifold is damaged
Check manifold, replace if needed
Lift Pressure Sensor
Fault (P2)
Wiring harness is damaged
or connected incorrectly
Check wiring harness, replace if needed
Manifold is damaged
Check manifold, replace if needed
Valve Block Failure
Wiring harness is damaged
or connected incorrectly
Check wiring harness, replace if needed
Manifold is damaged
Check manifold, replace if needed
CAN Failure
Wiring harness is damaged
or connected incorrectly
Check wiring harness, replace if needed
ECU is damaged
Check ECU replace if needed
Battery Fault
Wiring harness is damaged
or connected incorrectly
Check wiring harness, replace if needed
Battery is low
Charge or replace vehicle battery
System
Check 2
Slow leak in air system
Check air plumbing, and air springs, replace as
needed .
Manifold is damaged
Check manifold, replace if needed
System
Check 3
Air plumbing is damaged or
corrected improperly
Check air plumbing, correct as needed
Manifold is damaged
Check manifold, replace if needed
