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Section 5 – Procedures Platform
5.2-8 SCM Pin Voltage Reference
1
12
13
23
35
24
All voltages given are with SCM controller at maximum % adjustable settings.
All voltages should be tested with key on, engine off and foot switch depressed.
All tests should be performed with platform over drive axle, boom fully stowed and on flat level surface.
Pin 1 - 12 volt input from wire 4.
Test between pin 1 and 02 wire.
Pin 2 - 12 volt input from wire 4.
Test between pin 2 and 02 wire.
Pin 3 - 8 volt output (purple wire) to boom speed controller.
7.5 volts= speed control in circuit. Test between pin 3 and 02 wire.
Pin 4 - Turret position. 12 volt output on wire 17A to relays 17ACR1 and 17ACR2 for directional sensing.
0 volts= Platform over drive axle.
12 volts= Platform over steer axle. Test between pin 4 and 02 wire.
Pin 5 - 12 volt output on wire 20B to load sense dump valve when any function selected.
Test between pin 5 and 02 wire while selecting a function.
Pin 6 - 12 volt output on wire 08 to boom control switches.
Test between pin 6 and 02 wire.
Pin 7 - 12 volt output on wire 65 to axle lock valve 3H-65 to float axle. 0 volts when above limit switches.
Test between pin 7 and 02 wire.
Pin 8 - Boom down selected. Proportional output on wire 13 to boom down valve 4H-13.
0 volts to 4.85 volts depending on position of joystick. Threshold= 1.5 volts. Test between pin 8 and 02
wire while operating boom down.
Pin 9 - Telescope in selected. Proportional output on wire 38 to telescope in valve 3H-38.
0 volts to 4.65 volts depending on boom speed control potentiometer.
Threshold= .95 volts.
Test between pin 9 and 02 wire while operating telescope in.
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