Model 4700 Maintenance Manual
Section 8. Theory of Operation
Single Traction Motor Trucks >S/N 10676 Item
Connection
Function Description
Theory of Operation
Pinout Matrix Normal Level
Signal Source
Signal User
179
J40-7
VCC
Supply voltage to the Lift pot (P3 at Approx. 5V J41-1) from the VM. If not present, check VM, wiring, and connections.
VM
P3
180
J40-8
CAN L
Communication line between the VM and optional HCB (J140-4). If option is not present, a jumper with terminating resistor is installed between J48-8 and J48-15.
N/A
VM
HCB
181
J40-9
N POT
Negative reference for the Lift pot (P3 at J41-3). If this reference is lost or intermittent, the lift pot will not function correctly and possibly will throw codes. If not present, check VM, wiring, and connections. Note: Check P3 by disconnecting it from the circuit and reading across it. Approx. 4K ohm should be read across J41-1 and 3.
Battery voltage wrt BT1+
VM
P3
182
J40-10
TILT
Input to VM from Tilt switch (SW12 at J43-3). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW12
VM
183
J40-11
C POT
Wiper input from the Lift pot (P3 at J41-2). Voltage will vary depending on lift request. The pot may need to be re-learned. If not present, check pot, wiring, and connections.
Approx. 2.5V in neutral; approx. 5V w/full lift requested
P3
VM
184
J40-12
AUX IN 3
Input to VM from the optional End-of Free Lift switch (SW16). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW16
VM
185
J40-13
AUX IN 1
Input to VM from the Lowering switch (SW15 at J47-3). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW15
VM
186
J40-14
AUX IN 2
Input to VM from Tilt Angle Prox switch (SW32). If not present, check switch, wiring and connections.
Approx. 5V open; 0V closed
SW32
VM
187
J40-15
CAN H
Communication line between the VM and optional HCB (J140-13). If option is not present, a jumper with terminating resistor is installed between J48-8 and J48-15.
N/A
VM
HCB
188
J40-16
AUX OUT 1
+24V output from VM, through fuse F13, to the optional Travel Alarm (BZ1 at J70+). If not present, check VM, wiring, and connections.
+24V
VM
BZ1
Publication 1160093, Issued: 20 May 2013
8-63
