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ELECTRICAL SYSTEM
Internal control module failures can stop the entire
network from communicating. If there are no harness
problems, disconnect control modules one at a time
until CANbus communication returns.
With both 120 ohm termination resistors connected to
the CANbus, resistance between the two circuits
should read 60 ohms.
If CANbus resistance is 120 ohms, there is an open
circuit or a termination resistor is missing.
If resistance is 0 ohms, the two circuits are shorted
together.
1.
Measure voltage between the diagnostic
connector, socket A and B(-).
NOTE: Key in ON position.
Is voltage approximately 2.5 volts?
YES- Proceed to Step 2.
NO- Inspect CAN HI circuit for open or short; if
voltage is 0 volts, the CAN HI circuit is shorted to
B(-) or open. If voltage is above 5 volts, the CAN
HI is shorted to power.
2.
Measure voltage between the diagnostic
connector, socket B and B(-).
NOTE: Key in ON position.
Is voltage approximately 2.5 volts?
YES- Disconnect the battery and proceed Step 3.
NO- Inspect the CAN LO circuit for open or short;
If voltage is 0 volts, the CAN LO circuit is shorted
to B(-) or open. If voltage is above 5 volts, the
CAN LO is shorted to power.
3.
Measure resistance between the diagnostic
connector, socket A and socket B.
Is resistance 60 ± 6 ohms?
USER INTERFACE, SETUP, AND
TROUBLESHOOTING
The dash display has a LCD screen for displaying
truck system information. The dash display also
contains a battery state-of-charge indicator.
Status Code Indication
This feature indicates if a status code is available. If a
status code is present, the fault code number followed
Check the Service Manual section in Yale Axcess Online for possible updates and check pertinent Bulletins
Confidential/Proprietary - Do Not Copy or Duplicate
General Maintenance and Diagnostic Data
YES- CANbus communication is operating
correctly.
NO- If resistance is 120 ohms; the CANbus has
an open circuit, missing, or damaged termination
resistor. If resistance is 0 ohms, the CANbus
circuits are shorted together. If resistance is open;
the CAN HI and/or CAN LO connection to the
diagnostic port may be open. Use the wiring
diagrams to detect and correct open circuit.
Troubleshooting the Tiller Control Card
Termination Resistor
Disconnect all Tiller Control Card connectors and
components.
1.
Measure resistance between the Tiller Control
Card connector CJ2, pin 1 and pin 2.
Is resistance 120 ± 12 ohms?
YES- Reconnect the Tiller Control Card
connectors, components, and proceed to
Troubleshooting the Traction Controller
Termination Resistor.
NO- Replace Tiller Control Card.
Troubleshooting the Traction Controller
Termination Resistor
Disconnect all Traction Controller connectors, cables,
and components.
1.
Measure resistance between the Traction
Controller connector CPS01, pin 21 and pin 34.
Is resistance 120 ± 12 ohms?
YES- Reconnect the Traction Controller
connectors, cables, components, and proceed to
Troubleshooting the CANbus.
NO- Replace Traction Controller.
User Interface
by the status code description will be displayed. If
other status codes are present, it will display the
subsequent status code and description. Two seconds
will lapse between display screens before displaying
the code sequencing.
PARAMETERS
Utilize the User Interface to access and adjust
parameters. Not all parameters will be available and
will vary between truck applications.
9030-03-7
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Table of Contents
Troubleshooting
