Published 08-25-09, Control # 077-04 3-7
RT9130E SERVICE MANUAL ELECTRICAL SYSTEM
The Electrical System Diagnostic lamp is located in the cab
in the center of the front console. The lamp is used for
troubleshooting the superstructure and carrier control
modules. A red indicator light illuminates, giving the operator
a signal that there is a problem with the crane’s operation
which must be corrected. The Electrical System Diagnostic
lamp can have four symptoms.
1. Only the Electrical System Diagnostic lamp is flashing
(ignition switch may be in the on or off position) - crane
electrical system output diagnostic error, possible open
load, short to battery or short to ground. Use service
software to locate error.
2. The Electrical System Diagnostic lamp is on solid and
the turn signal indicators are flashing (ignition switch
may be in the on or off position) - no communications
from the carrier control module.
3. The Electrical System Diagnostic lamp is not on but the
turn signal indicators are flashing and the ignition switch
is on - no communication from the engine’s ECM.
4. The Electrical System Diagnostic lamp is not on but the
turn signal indicators are flashing and the ignition switch
is off - there is communication from the carrier control
module to the superstructure control module but no
communications from the superstructure control module
to the carrier control module.
This machine has a CAN-Bus Multiplex electronic control
system. This system takes multiple information signals and
combines them into one signal. The benefits of this system
include less wiring, fewer relays, and fewer slip ring
connectors.
When troubleshooting the control modules, a Laptop with the
CAN link service tool software and a service cable will be
needed to access the CAN system by the two Vehicle Data
Link connections located in the cab and by the battery
disconnect switch. When performing this type of
troubleshooting, the battery disconnect switch must not be
deactivated so there is power for the service tool. For
ordering the service tool software and service cable, contact
Manitowoc Crane Care.
Troubleshooting Lights
1. Check lamp first. Replace any defective lamp.
2. If all lamps in a circuit do not work, suspect fuse and
switch. Replace fuse if blown.
3. Check the switch and circuit for continuity problems and
other problems. Repair any faulty switch or other
component. Repair wiring if faulty.
The following circuit designs apply (connecting wiring
and passage through superstructure and carrier
modules -- as applicable -- is understood):
- Head lights. Fuse F4, HEADLIGHTS switch, lamps,
grounds.
- Tail lights. Fuse F4, HEADLIGHTS switch, lamps,
grounds.
- Marker lights. Fuse F4, HEADLIGHTS switch,
lamps, grounds.
- Gauge and panel lights. Fuse F4, lamps/LEDs,
grounds.
- Turn signal lights. Fuse F4, turn signal switch,
lamps, grounds. Suspect turn signal switch if hazard
light circuit functions properly.
- Hazard lights. Fuse F4, flasher, HAZARD lights
switch, lamps, grounds. Suspect HAZARD lights
switch if turn signal lights circuit functions properly.
- Stop lights. Fuse F4, stop light switch, turn signal
switch, lamps (suspect stop circuit problem if turn
signal or tail light function works), grounds.
- Work light. Fuse F1, WORK light switch, lamp,
grounds.
- Dome light. Fuse F3, switch on dome light, lamp,
grounds.
- Spotlight. Fuse F3, switch on spotlight, lamp,
grounds.
- Boom flood lights. Fuse F7, BOOM LIGHT switch,
lamps, grounds.
4. Repair is straightforward. Turn off light switch, remove
old light, install new light, turn on light switch to test light.
Troubleshooting Gauges and Meters
1. Check all other gauges and meters (besides the
suspect). If none of them are working, replace Fuse F14.
2. Check the gauge or meter, its sensing component, and
circuit for continuity problems and other problems. A
sender is probably at fault when it shows infinite
resistance, or resistance out of specifications for
condition. Repair any faulty gauge, meter or other
component. Repair wiring if faulty.
3. The circuit design for a gauge’s light or a panel light is
fuse F4, light, ground.
CAUTION
When welding on the crane, turn battery disconnect off to
prevent damage to the CAN-Bus system.
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