Product Manual

32
Fault
Code
Explanation Possible Causes
PLC
Select
1M
PLC
Select
2M
41
Slow wheel recovery on Red valve
channel.
For a 2M System, verify sensor and valve
wiring/plumbing is correct. (See Side-By-
Side and Axle-By-Axle confi gurations).
Slow brake release, foundation brake
mechanical faults, dry bushings, broken
ABS valve, restricted piping. Check for
kinks and blockage etc., incorrect air-
lines, wiring.
X
42
Slow wheel recovery on Blue valve
channel.
X
43
Slow wheel recovery on Yellow valve
channel.
X
61
Hold solenoid Open circuit on Red
valve channel.
Modulator valve solenoid failure, solenoid
connection, or valve cable damage. The
most likely causes include: a bad solenoid
or a loose solenoid connection. Disconnect
the indicated solenoid and check the
resistance at the solenoid pins.
Check the female terminals on the
connector for excessive pin spread or
corrosion. Replace defective hardware as
required and retest.
X
62
Hold solenoid Open circuit on Blue
valve channel.
X
63
Hold solenoid Open circuit on Yellow
valve channel.
X
67
Dump solenoid Open circuit on Red
valve channel.
X
68
Dump solenoid Open circuit on Blue
valve channel.
X
69
Dump solenoid Open circuit on
Yellow valve channel.
X
71
Hold solenoid Short circuit to ground
on Red valve channel.
Modulator valve solenoid failure, or value
cable damage. The most likely causes
include: a damaged cable or solenoid. An
example of this is a worn or chafed cable
that has exposed wires contacting the
trailer.
Disconnect the indicated solenoid and
check the resistance at the solenoid pins.
X
72
Hold solenoid Short circuit to ground
on Blue valve channel.
X
73
Hold solenoid Short circuit to ground
on Yellow valve channel.
X
77
Dump solenoid Short circuit to
ground on Red valve channel.
X
78
Dump solenoid Short circuit to
ground on Blue valve channel.
X
79
Dump solenoid Short circuit to
ground on Yellow valve channel.
X
9
3.2 ELECTRICAL CONTROL PANEL
A. POWER SOURCE SWITCH
Select between Internal Battery, External Power or Power Off.
Center: OFF (battery charge in this position only)
Up: Installed Battery ON
Down: External Power ON (power supply is an optional accessory)
B. BACKLIT 30 AMP AMMETER
Meter shows current draw of a selected circuit up to 30 amps.
C. TROUBLE WARNING INDICATORS
Flashing red LEDs indicate problems that may exist in a selected circuit. This includes
the Overload Indicator, Open Circuit Indicator, and Reversed (Battery) Polarity Indicator.
D. MUTE SWITCH
ON disables sound. OFF enables sound.
E. AUTO CYCLE INDICATOR
Illuminates when Auto Cycle Mode is engaged.
F. VOLTAGE INDICATOR
Shows supplied battery voltage integrity. Operating voltage range: 12/24 volt DC.
G. GROUND INTEGRITY
A large green LED above the control knob indicates ground status. Ground
integrity is automatically verifi ed when power is turned on.
H. CONTROL KNOB
Knob activates all electrical test modes and circuits to be diagnosed.
I. CIRCUIT INDICATORS
The small green LEDs illuminate or blink in testing phase.
J. HAZARD SWITCH
Activate the four-way fl ashers on trailer.
K. 30 AMP FUSE SOCKET
Overload protection.
A
B
D
Electrical Control Panel
C
F
E
G
H
I
J
K