TM 5-3805-281-24-1
Sub-System Diagnostics
YES: Wire harness is OK.
Go to next check.
NO: Wire from connector
D to sensor harness
connector pin 2 has
failed. Repair.
9015
15
T118370 1921NOV98
87
1--Positive Pin
2--Sense Pin
3--Negative Pin
Install jumper between sensor harness connector pins 1 and 2.
Disconnect 22-pin connector D and 16-pin connector B from engine and pump
controller.
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) .
Is continuity measured?
2/2
YES: Sensor is OK.
Install pump pressure sensor test harness JT07354 in series with wiring harness and
REAR PUMP PRESSURE
Engine and pump
sensor.
SENSOR (B18) AND
controller may have
FRONT PUMP
failed.
Connect voltmeter to test harness jacks.
PRESSURE SENSOR
(B19) CHECK
NO: Sensor has failed.
With engine running, pilot control lever forward, and hydraulic functions in neutral,
Replace.
observe voltmeter.
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?
1/1
4-155
