OPERATOR’S MANUAL
ERROR
CODE
ERROR
PROBABLE CAUSE
CORRECTIVE ACTION
608/609 Ground Low/High Voltage Ground offset measurement out of range:
1. ECU ground or Solenoid ground have a poor
connection.
2. Damaged/shorted actuator harness.
3. Defective PWM valve driver or Servo valve driver.
4. Defective module.
Check GROUND voltage on Diagnostic screen
for Control Module, then:
1. Check battery ground connections and wiring.
2. Inspect actuator harness for damage around
the PWM and Servo valve connections. Repair
or replace harness.
3. Inspect PWM or Servo valve drivers for
damage and replace if necessary.
4. Inspect module for damage and replace if
necessary.
701 Service Keyboard Mode A mode that allows keyboard use when ground
speed is above 0 and the master switch is OFF.
1. Service Keyboard Mode is enabled at the F10
System screen. Warning continues to displays
until the function is disabled.
Flex4 Pro
TM
Control System
6010541 Rev A
TROUBLESHOOTING / 141
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