Head Tail Light Open Circuit; Ground Module Constant Data Update Required; Ground Module Failure: Hwfs Code; Ground Module Failure:high Side Driver Cutout Faulty - JLG 1250AJP Troubleshooting Manual

1.121 GROUND MODULE CONSTANT DATA UPDATE REQUIRED

Flash Code: 9-9
Ground module constant data update required. The ground module has old constant data that is not compatible with the
current ground module software. The ground module constant data must be updated to a newer version. A power cycle is
required.
Note Pretest Instructions
1.121.1 Cycle power

1.122 GROUND MODULE FAILURE: HWFS CODE 1

Flash Code: 9-9
Ground module failure: hardware failsafe code 1. The ground module V(low) FET has failed. A power cycle is required.
Note Pretest Instructions
1.122.1 Cycle power

1.123 GROUND MODULE FAILURE:HIGH SIDE DRIVER CUTOUT FAULTY

Flash Code: 9-9
Ground module failure: high side driver cutout faulty. There is an internal problem with the ground module.

1.124 GROUND SENSOR REF VOLTAGE OUT OF RANGE

Flash Code: 9-9
Ground sensor reference voltage out of range. The ground module 7VDC reference voltage is out of acceptable range. This
reference voltage is unused at this time. Possible causes of this fault include bad supply circuit in the module, or wires mis-
takenly connected to the following pins on ground module J7 [X007]: J7-5, J7-16, J7-26, or J7-27.
Note Pretest Instructions
1.124.1
1.124.2 Use backprobing for follow-
ing measurement. See
Backprobing on Pg. 319 for
details.

1.125 HEAD TAIL LIGHT OPEN CIRCUIT

Flash Code: 3-3
Head tail light open circuit. The head and tail light output [X002.26] is open. See 1.377 COMMON STB OR OC PROCE-
DURE on Pg. 174.

1.126 HEAD TAIL LIGHT SHORT TO BATTERY

Flash Code: 3-3
Head tail light short to battery. The head and tail light output [X002.26] is shorted to battery. See 1.377 COMMON STB OR
OC PROCEDURE on Pg. 174.
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SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING
Test
Does fault clear?
Test
Does fault clear?
Test
Are there any wires present in any of the fol-
lowing terminals: ground module J7 terminal
5 [X007.5], terminal 16 [X007.16], terminal
26 [X007.26], or terminal 27 [X007.27]?
Is there 6.6VDC - 7.5VDC at the following ter-
minals: ground module J7 terminal 5
[X007.5], terminal 16 [X007.16], terminal 26
[X007.26], or terminal 27 [X007.27]?
1250AJP
Result Corrective Action
Yes Troubleshooting complete
No Reprogram/replace ground module
Result Corrective Action
Yes Troubleshooting complete
No Replace ground module
Result Corrective Action
Yes Make note of other faults then remove one wire. If
any new faults appear or faults go away, use that
information to find proper place for the wire.
Repeat until all wires are placed correctly.
No Go to step 1.124.2
Yes Reprogram/replace the ground module
No Replace the ground module
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