SECTION 6 - DIAGNOSTIC TROUBLE CODES
3121166 – JLG Lift – 6-19
9956 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s field current control or MOSFET’s are mal-
functioning.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9957 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s hardware that generates an interrupt at 36V
and 12V did not respond properly at power-up.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9958 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s pump current measurement or MOSFET are
malfunctioning.
• Pump current measurement >2.74V or <2.26V for 200mS while
idle.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9960 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module detected an issue with the traction current
measurement or the MOSFET’s.
• Armature current feedback >2.74V or < 2.26V while idle
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9962 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s temperature feedback is >4.9V or <0.1V.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9963 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module detected a mismatch in the redundant RAM
information stored in the power PCB.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - ON
9964 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s analog to digital converter does not
respond for the interface PCB.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9969 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s MC/EB/EV/DV Enable is always on. This is
internal fault.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9970 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module detected a mismatch in the redundant RAM
information stored in the interface PCB.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - ON
9971 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s MC/EB valve activation pin is shorted. This
is an internal fault.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
99143 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s power and interface PCB digital inputs do
not agree.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
99144 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s MC feedback from the interface PCB dis-
agrees with the feedback from the power PCB.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9-9 Hardware
DTC FAULT MESSAGE DESCRIPTION CHECK
To Next Page
Loading...
