YES: Wire harness is OK.
Go to next check.
NO: Wire from connector
D to sensor harness
connector pin 2 has
Install jumper between sensor harness connector pins 1 and 2.
Disconnect 22-pin connector D and 16-pin connector B from engine and pump
Measure continuity between pin 9 of harness connector B and pin 16 of harness
connector D (for front pressure sensor), or pin 17 of harness connector D (for rear
pressure sensor) .
YES: Sensor is OK.
Install pump pressure sensor test harness JT07354 in series with wiring harness and
REAR PUMP PRESSURE
Engine and pump
SENSOR (B18) AND
controller may have
NO: Sensor has failed.
With engine running, pilot control lever forward, and hydraulic functions in neutral,
Is voltage 0.5 - 0.7 volts?
Actuate arm in to achieve hydraulic function over relief.
Does voltage increase to 3.3 - 3.5 volts with hydraulic function over relief?