TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 59 of 1417
DIAGNOSTIC FAULT COTES
Table
1.
Diagnostic Fault Codes
00
System is OK, vehicle is moving > 6 MPH
Not a problem
03
04
(A) sensor/wiring open or short circuit rear axle
left side
(B) sensor/wiring open or short circuit rear axle
right side
Sensor loose, sensor faulty, or damaged cable
07
System is OK, no sensor output. Rotate wheel
to generate wheel signal
Not a problem
13
14
(A) sensor system fault, rear axle left side (2A)
(B) sensor system fault, rear axle right side
(2B)
(Low Sensor Output Group)
Sensor worn or maladjusted, damaged sensor
or cable
23
24
(A) sensor system fault, rear axle left side (2A)
(B) sensor system fault, rear axle right side
(2B)
(Intermittent Low Sensor Output Group)
Wheel bearing worn, loose, maladjusted;
exciter damaged, loose. Damaged or
corroded sensor electrical connection
42
43
Slow recovery of one wheel of blue channel
left side
Slow recovery of one wheel of yellow channel
right side
Brake drag, damaged modulator, or pinched
hose. Failed primary reservoir
62, 63
68, 69
Hold solenoid open circuit, blue channel (62),
yellow channel (63)
Dump solenoid open circuit, blue channel (68),
yellow channel (69)
Solenoid cable damaged, solenoid damaged,
loose connection
72, 73
78, 79
Hold solenoid short circuit, blue channel (72),
yellow channel (73)
Dump solenoid short circuit, blue channel (78),
yellow channel (79)
Solenoid cable damaged, solenoid damaged
82, 83
88, 89
Hold solenoid circuit fault, blue channel (82),
yellow channel (83)
Dump solenoid circuit fault, blue channel (88),
yellow channel (89)
Solenoid cable damaged, solenoid damaged,
or ECU damaged
90
91
92
Supply voltage below 21.0 V
Supply voltage at the controller < 8V
Supply voltage at the controller >33V
Power cable wire, terminal, or splice damaged
or corroded
C1
CA, CC
A(x)
C1 - 2S/2M configuration
CA - Erase memory signal, CC – Clear
configuration (power down if this occurs)
Software options
Not a problem
8.8
Self diagnostic check at power-up
Not a problem
TM 9-2320-272-23-2
0154
0154-4
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