jcb JS300 Service Manual page 483

Solenoid connected output off = 0.1 V approx.
Solenoid connected output on = battery voltages
nominal.
Solenoid disconnected output off = reduced voltage
(15 V - 22 V).
Solenoid disconnected output on = battery voltage
nominal.
Shorted to ground = 0 V.
Shorted high (to positive) = battery voltage.
ECU
µ
IN
Output
supply +24v
Vbb
Driver
Fig 20.
C-58
ST
A
A
OUT
Pull up
Resistor 10k
*
C005880GB
9813/5100-1
Section C - Electrics
Electronic Controllers
Testing of ECU Inputs + Outputs
C-58