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 189 of 1417
ABS - CODE YEHd 73 (RIGHT SIDE - YELLOW CHANNEL) - Continued
STEP
2.
DOES A SHORT CIRCUIT TO GROUND EXIST IN THE HOLD CIRCUIT?
a.
Ensure battery and start switches are in the OFF position.
T0953DAA
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 4. Refer to point to point schematics.
d.
Connect multimeter black lead to a known good ground.
e.
Meter reading should be infinite (greater than 10M ohms). Note reading.
f.
Connect multimeter red lead to 28-pin connector, terminal 14.
g.
Connect multimeter black lead to a known good ground.
h.
Meter reading should be infinite (greater than 10M ohms). Note reading.
i.
Connect multimeter red lead to 28-pin connector, terminal 24.
j.
Connect multimeter black lead to a known good ground.
k.
Meter reading should be infinite (greater than 10M ohms). Note reading.
TM 9-2320-272-23-2
0175
0175-4
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