Troubleshooting "Hxxx" And "Pxxx" Faults - Terex Genie GS-1330m Service And Repair Manual

August 2021

Troubleshooting "HXXX" and "PXXX" Faults

The procedure below illustrates typical steps for diagnosing and fixing faults of type "HXXX" and "PXXX".
Diagnostic Chart
1 Check the faulted device for a short or open circuit.
Check short or open circuit of the harness or
2
connector between Ground Controls and faulted device.
3 Check GCON Electronic Control Module (ECM).
Wiring Diagram
The wiring diagram shown below illustrates how fault type "HXXX" and "PXXX" devices are typically
wired.
The signal of these types of devices originates at the Ground Controls and terminates at system ground.
GCON
Electronic Control Module
(ECM)
In order to successfully troubleshoot "HXXX" or "PXXX" type faults, the entire faulted out circuit must be
investigated.
Part No. 1309020GT
Troubleshooting "HXXX" and "PXXX" Faults
Good 
Good 
Signal Wire
GS ™ -30m • 32m • 30 • 32 • 46 • 55
No
Good
Replace faulted device.

No
Repair or replace harness an/or
Good
connector.

No
Good
Replace ECM.

Signal Side Device
Service and Repair Manual
Return Side Return Wire
183