SECTION 6 - TROUBLESHOOTING
6-30
31215825
Code 28 - Reserved
Code 29 - Reserved
Code 30 - Traction Module - No Communication with Ground Control Module
Check For These Obvious Conditions First:
• Check if the communications cable connections, P5 connector on the Ground Control Module and round plug on the Traction Con
-
trol Module are seated properly in their sockets at each end.
• Check the Positive (+) (RED) and Negative (–) (BLACK) power cable connections from the Ground Control Module to the Traction
Control Module are tight and secure at both ends.
Code 31 - Platform Control Console - No Communication with Ground Control Module
Check For These Obvious Conditions First:
• Check the harness connection at the P4 connector on the Ground Control Module and the harness connection at the other end on
the Platform Junction Box.
Table 6-30. Code 30 - Traction Module - No Communication with Ground Control Module
STEP
ACTION
SPEC
YES
NO
1.
Check the voltage reading at the main power Positive (+)/Negative (–
) cable connection on the Traction Control Module.
24v DC
Go to Step 2
Repair or Replace
Positive (+) or
Negative (–)
Cable
2.
Remove the communications cable, P5 connector at the Ground
Control Module and round connector at the Traction Control Module.
Check continuity of all three (3) wires in the communications cable
from end to end. P5 - Pins 2, 3, and 4.
—
Go to Step 3
Repair or Replace
Wire(s)
3.
With communications cable disconnected at both ends, check for
continuity between Pins 2, 3, and 4 of the P5 connector end.
—
Repair or Replace
Wires
Go to Step 4
4.
Plug the communications cable on the Traction Control Module to
the round socket on the opposite end of the module. Does this fix
problem?
—
Done
Replace Traction
Control Module
5.
Unplug the P5 connector at the Ground Control Module. Check volt
-
age between pins 2 (– lead-in) and 5 (+ lead-in). Is voltage within spec.
4.5v DC
Done
Replace Ground
Control Module
Table 6-31. Code 31 - Platform Control Console - No Communication with Ground Control Module
STEP
ACTION
SPEC
YES
NO
1.
Check if LEDs are illuminated on the Platform Control Console.
—
Go To Step 2
Go to Step 3
2.
Remove the 9 pin Platform Control Console connector from the side
of the Platform Junction Box and the P4 connector at the Ground
Control Module. Check continuity from the P4 connector, pin-5 to
Junction Box pin-3 and P4, pin-9 to Junction Box pin-4.
—
Repair or Replace
Platform Control
Console
Repair or Replace
Wiring
3.
Remove the 9 pin Platform Control Console connector from the side
of the Platform Junction Box. Check the voltage across pins-1 and 5
in the Junction Box connector.
24V DC
Repair or Replace
Platform Control
Console
Go to Step 4
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