MWO-9-2320-272-35-1
MODIFICATION OF 5-TON M939, M939A1, M939A2 SERIES FAMILY OF VEHICLES (FOV)
M939 BRAKE STABILIZATION PROGRAM (RETROFIT OF ANTI-LOCK BRAKE SYSTEM (ABS) FOR M939 FOV); MODIFICATION WORK ORDER
JANUARY 2007
CHANGE 1
MWO-9-2320-272-35-1 - Page 31 of 109
MWO 9-2320-272-35-1
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Table 1. Diagnostic Fault Codes.
00
System is OK, vehicle is moving > 6 MPH
Not a problem
03
A
sensor/wiring open or short circuit rear axle
Sensor loose, sensor faulty, or damaged cable
left side
04
B
sensor/wiring open or short circuit rear axle
right side
07
System is OK, no sensor output. Rotate wheel to
Not a problem
generate wheel signal
13
A
sensor system fault, rear axle left side (2A)
Sensor worn or maladjusted, damaged sensor
14
B
sensor system fault, rear axle right side (2B)
or cable
(Low Sensor Output Group)
23
A
sensor system fault, rear axle left side (2A)
Wheel bearing worn, loose, maladjusted;
24
B
sensor system fault, rear axle right side (2B)
exciter damaged, loose. Damaged or corroded
sensor electrical connection
(Intermittent Low Sensor Output Group)
42
Slow recovery of one wheel of blue channel left
Brake drag, damaged modulator, or pinched
side
hose. Failed primary reservoir
43
Slow recovery of one wheel of yellow channel
right side
62, 63
Hold solenoid open circuit, blue channel (62),
Solenoid cable damaged, solenoid damaged,
yellow channel (63)
loose connection
68, 69
Dump solenoid open circuit, blue channel (68),
yellow channel (69)
72, 73
Hold solenoid short circuit, blue channel (72),
Solenoid cable damaged, solenoid damaged
yellow channel (73)
78, 79
Dump solenoid short circuit, blue channel (78),
yellow channel (79)
82, 83
Hold solenoid circuit fault, blue channel (82),
Solenoid cable damaged, solenoid damaged,
yellow channel (83)
or ECU damaged
88, 89
Dump solenoid circuit fault, blue channel (88),
yellow channel (89)
90
Supply voltage at the controller <21V
Power cable wire, terminal, or splice damaged
or corroded
91
No supply voltage at controller
Voltage at 3 amp fuse, no voltage at
15 amp fuse
92
Supply voltage at the controller >33V
Power cable wire, terminal, or splice damaged
or corroded
C1
C1 - 2S/2M configuration
Not a problem
CA, CC CA - Erase memory signal, CC - Clear
configuration (power down if this occurs)
A(x)
Software options
8.8
Self diagnostic check at power-up
Not a problem
E0-E9
Defective ECU
Replace ECU and retest
EA-EF
Defective ECU
93, 99
Defective ECU
Blank
No power to diagnostic unit
Faulty power supply, open or short in
communication line
Hi, Lo
Low power or communication issue
No power to line 10 mixed, hardware
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