Spicer CTIS (Central Tire Inflation System) Troubleshooting Guide - Manual (Page 65)

62
Wire Harness
Electrical Schematics
M939 Wiring Diagram (676422 and 676603)
J XDCR COMMON
P **RF GND
** MAY EXIST ON SOME SYSTEMS AND NOT ON OTHERS
c XDCR SIGNAL
b XDCR VREF
FUSE
B SPEED
ECU Connector
B
A 9-PIN
DIAGNOSTIC
F
G
A SPEED
VEHICLE POWER PANEL
+VBATT
IGNITION
SWITCH POWER
F GROUND
V GROUND
Z CONFIG 1
N
a
K SPEED
Y SPEED
GND
**J1708A
**J1708B
H
X POWER
POWER
M CONFIG 2
SPEED SENSOR INPUT
SPEED
E WARNING
LAMP WARNING LAMP
B
C DEFLATE SOL
SUPPLY SOL
G GROUND
W GROUND
R CONTROL SOL
WARNING LAMP
GROUND
PRESS SW PRESSURE
SWITCH INPUT
T PRESS SW
L GROUND
GROUND
A
D
B
C CONFIGURATION SELECTION
Jumper plug may tie each config line to POWER or GROUND
to select config. See configuration page for details. ( )
S BLACKOUT
BLACKOUT
BLACKOUT INPUT
Battery Voltage = Normal
Ground = Blackout ( (
XDCR COMMON
XDCR SIGNAL
XDCR VREF
1 - CHANNEL
PNEUMATIC CONTROLLER
E
C
PCU SENSOR
B GROUND
N/C
SUPPLY SOL
GROUND
DEFLATE SOL
CONTROL SOL
DEFLATE
SUPPLY
CONTROL
D
A
F
*
*
*
A
B
**J1939(-)
**J1939(+)
C
D
D
A
GROUND
J1708A
J1708B
POWER
POWER
GROUND
CONFIG 1
CONFIG 2
J1939(+)
J1939(-)
c (round connector) C (all connectors)
B (round connector)
or
A (oval connector)
A (round connector)
or
B (oval connector)
PCU Sensor Harness Connector Pin ECU Harness Connector Pin
PCU SENSOR
b (round connector)
J (round connector)
*