Model 4700 Maintenance Manual

179J40-7 VCC Supply voltage to the Lift pot (P3 at J41-1) from the VM. If not present, check VM, wiring, and connections.

180J40-8 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.

181J40-9 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.

Section 8.Theory of Operation

182J40-10 TILT

183J40-11 C POT

Input to VM from Tilt switch (SW12 at J43-3). If not present, check switch, wiring, and connections.

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.

184J40-12 AUX IN 3Input to VM from the optional End-of Free Lift switch (SW16). If not present, check switch, wiring, and connections.

185J40-13 AUX IN 1Input to VM from the Lowering switch (SW15 at J47-3). If not present, check switch, wiring, and connections.

186J40-14 AUX IN 2Input to VM from Tilt Angle Prox switch (SW32). If not present, check switch, wiring and connections.

187J40-15 CAN HCommunication 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.

188J40-16 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.

Publication 1160093, Issued: 20 May 2013

Battery voltage wrt BT1+

Approx. 5V open; 0V closed

Approx. 2.5V in neutral; approx. 5V w/full lift requested

Approx. 5V open; 0V closed

Approx. 5V open; 0V closed

Approx. 5V open; 0V closed

Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout Matrix Single Traction Motor Trucks >S/N 10676

189J40-17 GND B– supply to VM. This B– is shared by many components prior to and after the VM. If not present, follow back towards B– until loss can be determined.

190J40-18 AUX IN 4Input to the VM from the optional Lift-Limit with Bypass switch (PB9). If not present, check switch, wiring, and connections.

191J40-19 AUX OUT 2+24V output from the VM, through fuse F23, to the Tilt Limit Solenoid (EV13). If not present, check VM.

192J40-20 +24V AUX+24V input to VM from DC/DC converter (J96-4). If not present, check converter, wiring, and connections.

193J40-21 +24V AUX+24V input to VM from DC/DC converter (J96-4). If not present, check converter, wiring, and connections.

194J40-22 AUX OUT 3+24V output from the VM, through fuse F22, to the Lift-Limit Solenoid (EV12). If not present, check VM, fuse F22, wiring, and connections.

195J40-23 NOT USED

196J41-1 VCC Supply voltage to the Lift pot (P3) from the VM (J40-7). If not present, check VM, wiring, and connections.

197J41-2 C POT Wiper input from the Lift pot (P3) to VM (J40-11). Voltage will vary depending on lift request. The pot may need to be re-learned. If not present, check pot, wiring, and connections.

198J41-3 N POT Negative reference for the Lift pot (P3) from the VM (J40-9). 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+ B– at J1–VM

Approx. 5V open; 0V closed

PB9VM

+24V VMEV13

+24V DC/DC Converter VM

+24V DC/DC Converter VM

+24V VMEV12

Approx. 5VVMP3

Approx. 2.5V in neutral; approx. 5V w/full lift requested

P3VM

Publication 1160093, Issued: 20 May 2013