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 239 of 1417
ABS - NO DATA (BLANK SCREEN ON HALDEX INFO-CENTER) - Continued
STEP
3.
IS BATTERY VOLTAGE PRESENT AT ABS ECU?
a.
Ensure battery and start switches are in the OFF position.
T0959DAA
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 1.
ABS Wiring Harness 28-pin ECU Connector.
b.
Disconnect main 28-pin connector at ECU (Volume 3, WP
0452).
c.
Turn battery switch ON.
d.
Turn start switch to RUN position.
e.
Set multimeter to measure VDC.
f.
Connect multimeter red lead to 28-pin connector, terminal 6. Refer to point to point schematics.
g.
Connect multimeter black lead to a known good ground.
h.
Meter reading should be between 21 and 24 VDC. Note reading.
i.
Connect multimeter red lead to 28-pin connector, terminal 7.
j.
Connect multimeter black lead to a known good ground.
k.
Meter reading should be between 21 and 24 VDC. Note reading.
TM 9-2320-272-23-2
0185
0185-2
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