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 113 of 1417
ABS - CODE S2A 03 (LEFT SIDE - BLUE CHANNEL) - Continued
STEP
2.
IS LEFT WHEEL SPEED SENSOR WIRING OPEN OR SHORTED?
a.
Ensure battery and start switches are in the OFF position.
T0854DAA
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 DUMP
BLUE (LEFT) SOLENOID HOLD
BLUE (LEFT) SOLENOID DUMP
SENSOR 2B HI
SENSOR 2A LOW
28 PIN CONTROL
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 1. Refer to point to point schematics.
d.
Connect multimeter black lead to 28-pin connector, terminal 10.
TM 9-2320-272-23-2
0162
0162-4
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