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 219 of 1417
ABS - CODE BUDU 88 (LEFT SIDE - BLUE CHANNEL) - Continued
STEP
2.
DOES A SHORT CIRCUIT TO BATTERY POSITIVE EXIST IN THE DUMP SOLENOID?
a.
Ensure battery and start switches are in the OFF position.
T0957DAA
SENSOR 2A HI
SENSOR 2B LOW
NOT USED
NOT USED
NOT USED
BLUE (LEFT) SOLENOID COMMON
YELLOW (RIGHT) SOLENOID HOLD
YELLOW (RIGHT) SOLENOID COMMON
NOT USED
NOT USED
LAMP -
B- GROUND
NOT USED
DDU B-
DIAGNOSTIC OUTPUT
DDU B+
20
21
11
10
1
2
12
13
22
23
14
4
3
5
15
24
25
16
6
7
17
26
27
18
8
9
19
28
DIAGNOSTIC INPUT
LAMP +
YELLOW (RIGHT) SOLENOID PUMP
BLUE (LEFT) SOLENOID HOLD
BLUE (LEFT) SOLENOID DUMP
SENSOR 2B HI
SENSOR 2A LOW
B+ PERM
NOT USED
NOT USED
NOT USED
IGNITION SWITCHED B+
Figure 2.
ABS Wiring Harness 28-pin ECU Connector.
b.
Disconnect main 28-pin connector at ECU (Volume 3, WP
0452).
c.
Connect multimeter red lead to 28-pin connector, terminal 3. Refer to point to point schematics.
d.
Connect multimeter black lead to battery positive.
e.
Meter reading should be infinite (greater than 10M ohms). Note reading.
f.
Connect multimeter red lead to 28-pin connector, terminal 13.
g.
Connect multimeter black lead to battery positive.
h.
Meter reading should be infinite (greater than 10M ohms). Note reading.
i.
Connect multimeter red lead to 28-pin connector, terminal 23.
j.
Connect multimeter black lead to battery positive.
k.
Meter reading should be infinite (greater than 10M ohms). Note reading.
TM 9-2320-272-23-2
0180
0180-4
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