Service Manual Owner's manual

SECTION 8 - DIAGNOSTIC TROUBLE CODES
8-18 – JLG Lift – 3121222
7742 FIELD VOLTAGE IMPROPER Drive, Steer, and Lift Prevented • The System Module voltage at the F1 and F2 terminals was
improper at power-up (expected to be ½ Battery Voltage). This is
caused by an open- or short-circuit in the field wiring or motor.
Disconnect the field and motor wiring from the System Module
and connect F1 / F2 with a short wire. If the situation persists
after a power cycle, it may be an internal issue.
• ZAPI - HEALTH (Status LED) - ON
8-1 Tilt Sensor
DTC FAULT MESSAGE DESCRIPTION CHECK
811 TILT SENSOR NOT CALI-
BRATED
The tilt sensor calibration has not been
performed.
• Calibrate the tilt sensor, see Section 5.2.
• Replace then calibrate tilt sensor, see Section 5.2.
812 NO DATA FROM TILT SEN-
SOR - NOT CONNECTED OR
FAULTY
No signal from tilt sensor. • Check tilt sensor connections and wiring in ground control box.
• Calibrate the tilt sensor, see Section 5.2.
• Replace then calibrate tilt sensor, see Section 5.2.
8-2 Platform Load Sense
DTC FAULT MESSAGE DESCRIPTION CHECK
821 LSS CELL #1 ERROR A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
822 LSS CELL #2 ERROR A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
823 LSS CELL #3 ERROR A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
824 LSS CELL #4 ERROR A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
825 LSS HAS NOT BEEN CALI-
BRATED
The load sensing system module has not
been calibrated
• Empty platform. Calibrate LSS, see Section 2.2: Calibration in the
LSS manual, 3124288.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
9-9 Hardware
DTC FAULT MESSAGE DESCRIPTION CHECK
991 LSS WATCHDOG RESET A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
992 LSS EEPROM ERROR A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
993 LSS INTERNAL ERROR - PIN
EXCITATION
A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
994 LSS INTERNAL ERROR -
DRDY MISSING FROM A/D
A problem has been detected with the
load sense system.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
995 POWER MODULE FAILURE -
PERSONALITY RANGE
ERROR
The power module detected an out-of-
range or corrupt personality setting
• Record all personality settings in ANALYZER -> PERSONALITIES
and ANALYZER -> MACHINE SETUP. Reset control system per-
sonalities to default settings by selecting a different model than
indicated, cycle power then select proper model. Then, enter per-
sonality settings recorded above.
7-7 Electric Motor
DTC FAULT MESSAGE DESCRIPTION CHECK