TM 10-3930-675-24-1
TROUBLESHOOTING INTRODUCTION - CONTINUED
0004 00
DIAG SERVO - CONTINUED
DIAG SERVO
6(13)
Signals from the slew and tilt buttons to ECU 790
connector 1.
Range = 1 to 9V, Neutral = 5V
SLEW CW/CCW
5.00V
CW = V>5V, CCW = V<5V
TILT IN/OUT
5.00V
In = V<5V, Out = V>5V
DIAG SERVO
7(13)
Signal from boom extension sensor and boom angle
sensor to ECU 790 connector 1.
Length Sensor Range = .2 to 5V
LENGTH SENSOR
1.00V
Retracted = <1V, Extended = >4V
ANGLE SENSOR
1.50V
Angle Sensor Range = 3 to 9V
Boom down = 7 to 8V, Boom up = 3 to 4V
DIAG SERVO
8(13)
Signals from lift cylinder pressure sensors to ECU 790
connector 1.
PRESS RETURN
Pressure Sensor Range = 1 to 10V (0-3625 psi)
PRESS RI
2.00V
1.50V
Press RI & LE = Retracted = 3 to 4V
PRESS LE
2.00V
1.50V
Press RI & LE = Extended = 5 to 6V
Return normally <2V, All full down = <2V
DIAG SERVO
9(13)
Signals to ECU 790 connector 2 from the Servo Pilot
OUTPUT
INPUT
Output = Target value, Input = Actual value
LIFT
0mA
0mA
Depending on joystick position, the target value
LOWER
0mA
0mA
appears.
The actual amperage will rise to closely match the
target value.
DIAG SERVO
10(13)
Signals to ECU 790 connector 2 from the Servo Pilot
OUTPUT
INPUT
Output = Target value, Input = Actual value
BOOM IN
0mA
0mA
Depending on joystick position, the target value
BOOM OUT 0mA
0mA
appears.
The actual amperage will rise to closely match the
target value.
0004 00-10