Models 4150/4250 Maintenance Manual Functional Description Theory of Operation Section 8. Theory of Operation Signal User Connector 89 JPC22-20 (4150) LPC_SENSE Sense wire used by the VM to determine the state of the LPC Contactor and FU3 (4150 only). Contactor De-energized: <0.5V Energized: B+ LPC Contactor VM 90 JPC22-21 EPO_SENSE Sense wire used by the VM to determine when the EPO (S21) is open. This is used to initiate braking and display a message. EPO Closed: B+ Open: <0.5V S21 VM 91 JPC22-22 HIGH_SPD Input to the VM from the optional Hi-Speed Limit Switch (S11) (Bottler’s Tilt). Activated: approx. 0V Not activated: 5V S11 VM 92 JPC24-1 +12VP 12V supply to the Steer Position Sensor from the VM. 10.8 to 13V VM Steer Position Sensor 93 JPC24-3 DGND DGND for left Battery Gate Switch (S22A). <0.5V VM S22A 94 JPC24-4 DGND DGND for right Battery Gate Switch (S22B). <0.5V VM S22B 95 JPC24-5 DGND DGND for Mast Tilt Switch (S18) or Mini Power Supply for Tilt Centering option. <0.5V VM S18 or Mini Power Supply 96 JPC24-6 DGND DGND for Lift Limit Switch (S12). <0.5V VM S12 97 JPC24-6 Quad Mast DGND DGND for Mast Tilt Speed Reduction Switch (S12). <0.5V VM S12 98 JPC24-7 DGND DGND for Ambient Temperature Sensor. <0.5V VM Ambient Temp Sensor 99 JPC24-8 DGND DGND for Hi-Speed Limit Switch (S11). <0.5V VM S11 100 JPC24-10 DGND DGND for Pressure (Weight) Sensor. <0.5V VM Pressure Sensor 101 JPC24-12 DATA_LATCH No usable data can be obtained. 102 JPC24-13 +12VP 12V supply to the optional Pressure Sensor from the VM. 10.8 to 13V VM Pressure Sensor 103 JPC24-14 ADDR_LATCH No usable data can be obtained. 104 JPC24-17 POS A POS A input to the VM from the Steer Position Sensor. Activated: 1.36V Not activated: 8.12V Steer Position Sensor VM 105 JPC24-18 PRESSURE_AIN Input to the VM from the optional Pressure Sensor. 0 to 5V Based on weight on forks Pressure Sensor VM Publication: 1119828, Issued: 15 May 2014 Normal Level Signal Source Item 8-19