Model 4700 Maintenance Manual

Section 8.Theory of Operation

Single Traction Motor Trucks >S/N 10676 Pinout Matrix

Item Connection Function Description Theory of Operation Normal Level Signal Source Signal User

88J13-4 PM ENCODER CHANNEL B

89J13-5 TERM

Channel B from the Pump Motor (PM) encoder (EN3). If not present, check voltage to the encoder, wiring, and connections.

Ground from the VM (J34-6) to the Pump Motor (PM) temperature switch (TS2). If not present, check the PPA, wiring, and connections.

90J13-6 PM TEMPInput to the VM (J34-26) from the Pump Motor (PM) temperature switch (TS2). Input will be low under normal operating conditions. If overtemp condition exists [>266°F (130°C)], input will be high. Allow to cool. If still open (high), check switch, wiring, and connections.

91J13-7 thru 9NOT USED

92J15-1 +12V

+12V to the Traction Motor (TM) encoder (EN1) from the TPA (JET-1). If not present, check the TPA, wiring, and connections.

Approx. 5V running; 0V or 10V static

Battery voltage wrt BT1+ PPA TS2

Approx. 0V closed; 9V open TS2PPA

93J15-2 GND

Ground to the Traction Motor (TM) encoder (EN1) from the TPA (JET-2). If not present, check the TPA, wiring, and connections.

+12V TPAEN1

94J15-3 TM ENCODER CHANNEL B

Channel B from the Traction Motor (TM) encoder (EN1) to the TPA (JET-5). If not present, check voltage to the encoder, wiring, and connections.

Battery voltage wrt BT1+

Approx. 5V running; 0V or 10V static

95J15-4 TM ENCODER CHANNEL A

Channel A from the Traction Motor (TM) encoder (EN1) to the TPA (JET-3). If not present, check voltage to the encoder, wiring, and connections.

96J15-5 GND Ground from the VM (J34-6) to the TM temperature switch (TS1). If not present, check the VM, wiring, and connections.

97J15-6 TM TEMP SW (TS1)

Publication 1160093, Issued: 20 May 2013

Approx. 5V running; 0V or 10V static

Battery voltage wrt BT1+

Approx. 0V closed; 5V open

Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout Matrix Single Traction Motor Trucks >S/N 10676

99J20-1 SEAT Input from the Seat switch (SW2). If not present, check the seat switch, jumper at J22-A3 and J22-A4, wiring, and connections.

100J20-2 NOT USED

101J20-3 +V OUTB+ from TPA to Seat switch (SW2). If not present, check the seat switch, battery interlock, jumper at J22-A3 and J22-A4, wiring, and connections.

102J23-1 +V OUTVoltage from PPA to Battery Interlock switch (SW30). If not present, check PPA, switch, wiring, and connections.

103J23-2 +V OUTVoltage from Battery Interlock switch (SW30) to Seat switch (SW2) Provides input to amplifiers to allow operation. If not present, check PPA or TPA (as applicable), switch, wiring, and connections.

104J30-1 GND Ground to the Parking Brake switch (SW7) from the VM (J34-6). If not present, check wiring and connections.

105J30-2 NOT USED

106J30-3 PARK Input to the VM (J34-14) from the Parking Brake switch (SW7). If not present, check switch, wiring, and connections.

107J31-1 GND Ground to the Brake Pedal switch (SW6) from the VM (J34-6). If not present, check wiring and connections.

108J31-2 BRAKE Input to the VM (J34-15) from the Brake Pedal switch (SW6). If not present, check switch, wiring, and connections.

109J31-3 NOT USED

110J32-1 C POT Input from the wiper of the Travel pot (P2) to the VM (J34-3). If not present check pot, wiring, and connections. The pot may need to be re-learned.

Note: To check pot, unplug connector and measure resistance between pins 2 and 3. Approx. 4.6K ohms should be read (J32-2 to J32-3).

B+ SW2TPA

B+ TPATPA

B+ PPASW30, SW2

B+ SW30, SW2 PPA or TPA

Battery voltage wrt BT1+ VM SW7

Approx. 5V brake set; 0V brake released

SW7VM

Battery voltage wrt BT1+ VMSW6

Approx. 5V pedal not depressed; approx. 0V pedal depressed

SW6VM

P2VM

Publication 1160093, Issued: 20 May 2013