Section 8. Theory of Operation Pinout Matrix Item
Connection
Model 4700 Maintenance Manual Single Traction Motor Trucks >S/N 10676
Function Description
Normal Level
Signal Source
Voltage from the HCB to the Left (EV5) and Right (EV6) Sideshift Solenoids. If not present, check the HCB, wiring, and connections. Note: This voltage is common to both solenoids. If this voltage is lost, neither solenoid will work.
B+
HCB
EV5, EV6
Theory of Operation
Signal User
42
JCM-8
+V
43
JCM-9 thru 11
NOT USED
44
JCM-12
4th FUNCTION
Voltage from the HCB to turn on the 4th Function Solenoid (EV7). If not present, check the HCB, wiring, and connections.
Approx. 18V wrt B+ (approx. 22 ohms across coil)
HCB
EV7
45
JCM-13
+V
Voltage from the HCB to the 4th Function (EV7 and EV8) Solenoids. If not present, check the HCB, wiring, and connections. Note: This voltage is common to both solenoids. If this voltage is lost, neither solenoid will work.
B+
HCB
EV7, EV8
46
JCM-14
4th FUNCTION
Voltage from the HCB to turn on the 4th Function Solenoid (EV8). If not present, check the HCB, wiring, and connections.
Approx. 18V wrt B+ (approx. 22 ohms across coil)
HCB
EV8
47
JCM-15
R SIDESHIFT
Voltage from the HCB to turn on the Right Sideshift Solenoid (EV6). If not present, check the HCB, wiring, and connections.
Approx. 18V wrt B+ (approx. 22 ohms across coil)
HCB
EV6
48
JCM-16 thru 18
NOT USED
49
JCM-19
DRAIN
Voltage from the HCB to turn on the Drain Solenoid (EVP). If not present, check the HCB, wiring, and connections.
Approx. 2-13V wrt B+ when requesting lift and/or any aux function. (approx. 18 ohms across coil)
HCB
EVP
50
JCM-20
+V
Voltage from the HCB to the Drain Solenoid (EVP). If not present, check the HCB, wiring, and connections.
B+
HCB
EVP
51
JCM-21 and 22
NOT USED
52
JCM-23
GND
B– supply to optional HCB. 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.
Battery voltage wrt BT1+
B– at J1–
HCB
53
JCP-1
CAN L
Communication between the PPA and the TPA (JCT-2).
N/A
TPA, PPA
TPA, PPA
54
JCP-2
NOT USED
8-52
Publication 1160093, Issued: 20 May 2013
