Service Manual Owner's manual

SECTION 8 - DIAGNOSTIC TROUBLE CODES
3121222 – JLG Lift – 8-13
33297 LEFT BRAKE - SHORT TO
GROUND
Drive and Steer Prevented • Excessive current flow to the Left Brake Solenoid was detected (J1-
34 NLB).
• ZAPI - HEALTH (Status LED) - ON
33298 STEER LEFT VALVE - SHORT
TO GROUND
Drive, Steer and Lift Up Prevented • Excessive current flow to the steer left solenoid detected (J2-9
NLV).
• ZAPI - HEALTH (Status LED) - ON
33299 LINE CONTACTOR COIL -
SHORT TO BATTERY
Drive, Lift and Steer Prevented • Voltage from an external source was detected on the Negative
Main Line Contactor.
• ZAPI - HEALTH (Status LED) - ON
33302 NEGATIVE SUPPLY - SHORT
TO BATTERY
Drive, Lift, and Steer Prevented • At power-up, the system module detected an external short on
J1-12, J1-17, J1-23, J2-14 or J2-15. Normally these pins are
grounded by the System Module. All functions are prevented to
protect the control system.
• ZAPI - HEALTH (Status LED) - ON
33303 NEGATIVE SUPPLY - SHORT
TO GROUND
Drive, Lift and Steer Prevented • At power-up, the System Module detected an external short on
J1-12, J1-17, J2-14 or J2-15. Normally these pins are grounded
by the System Module. Since the external ground may compro-
mise integrity, all functions will be prevented.
• ZAPI - HEALTH (Status LED) - ON
33304 RIGHT BRAKE - SHORT TO
GROUND
Drive, and Steer Prevented • Excessive current flow to the Right Brake solenoid was detected
(J1-33 NRB).
• ZAPI - HEALTH (Status LED) - ON
33305 STEER RIGHT VALVE -
SHORT TO GROUND
Drive, Steer, and Lift Up Prevented • Excessive current flow to the Steer Right Solenoid was detected
(J2-18 NRV).
• ZAPI - HEALTH (Status LED) - ON
33406 LiFT UP VALVE - SHORT TO
GROUND
Drive, Steer, and Lift Up Prevented • Excessive current flow to the Lift Up Solenlid was detected at (J2-
2 PDV or J2-16 NDV).
• ZAPI - HEALTH (Status LED) - ON
33407 LIFT DN VALVE - SHORT TO
GROUND
Lift Up and Down Prevented • Excessive current flow to the Lift Down Solenoid was detected
(J2-16 NDV).
• ZAPI - HEALTH (Status LED) - ON
4-2 Thermal Limit (SOA)
DTC FAULT MESSAGE DESCRIPTION CHECK
421 POWER MODULE TOO HOT -
PLEASE WAIT
The power module has reached thermal
cutout.
• Power down and allow to cool.
• Do not operate in ambients over 140° F (60° C).
• Check for jammed or obstructed drive motors.
• Check for excessively high current consumption in the pump,
ANALYZER -> DIAGNOSTICS -> PUMP -> PUMP CUR over 130
Amps with an empty deck.
• Check for excessively high traction current consumption, ANA-
LYZER -> DIAGNOSTICS -> TRACTION -> ARM CUR over 120
Amps while driving on the level.
422 DRIVING AT CUTBACK -
POWER MODULE CURRENT
LIMIT
The drive portion of the power module
has reached thermal limit.
• Check for jammed or obstructed drive motors.
• Check for excessively high traction current consumption, ANA-
LYZER -> DIAGNOSTICS -> TRACTION -> ARM CUR over 120
Amps while driving on the level.
3-3 Ground Output Driver
DTC FAULT MESSAGE DESCRIPTION CHECK