TM 10-3930-675-24-1
TROUBLESHOOTING INTRODUCTION - CONTINUED
0004 00
DIAG SERVO - CONTINUED
DIAG SERVO
11(13)
Signal from ECU 790 connector 2 to the fan control
OUTPUT
INPUT
valve. Controlled by temperature.
FAN
0mA
0mA
Output = Target value, Input = Actual value
BL. VALVE 0.00V
0mA
Depending on temperature, the target value appears.
The actual amperage will rise to closely match the
target value.
Fan @ 100% = 200mA, Fan @ 0% = 1200mA
Blocking Valve voltage and amperage when lowering
boom. (0 to 24V) ECU 790 con. 2.
DIAG SERVO
12(13)
Signals from ECU 790 connector 2 to Attachment and
VALVES
OUTPUT
INPUT
Pump Off valves.
ATTACH.
0.00V
0mA
Ignition on with engine off - Aux pump on.
PUMP OFF
0.00V
0mA
Active tophandler functions; voltage and amperage to
Attachment Valve.
Ignition on with engine off; access this screen. Voltage
and amperage to Pump Off valve. Turn on engine; no
voltage/amp when pumps engage @ 600 RPMs.
DIAG ATTACHMENT
DIAG ATTACH
1(16)
Supply voltages to ECU 791 connector 1.
SYSTEM POWER
24.00V
Normal voltages 23 to 27V.
POWER RI
24.00V
POWER LE
24.00V
10V reference voltage output from ECU 791 connector
10V REF OUT
10.00V
2 to tilt angle sensor.
DIAG ATTACH
2(16)
Signal from tilt angle sensor to ECU 791 connector 1.
TILT ANGLE
5.00V
Tilt Angle Sensor Range = 3 to 9V
Tilt in = 7 to 9V, Tilt out = 3 to 4V, level = 4 to 5V
0004 00-11
