Komatsu PC200-8M0 Shop Manual page 568

SEN06132-01
List of pressure sensor measuring locations and reference values
Measuring location at sen-
Sensor
Charge pressure sen- R2: between (2) and (4)
R1: between (1) and (4)
sor
R2: Between (3) and (1)
Common rail pressure
sensor R1: Between (1) (+) and
(2) (-)
*: In addition to the above, when measuring R2', disconnect the following: (See circuit diagram related to each
failure code)
q When measuring R2' of charge pressure sensor (CA123):
Connectors of common rail pressure sensor, CAM sensor and water-in-fuel sensor (water sepa-
rator)
When measuring R2' of common rail pressure sensor (CA451):
q
Connectors of charge pressure sensor, CAM sensor and water-in-fuel sensor (water separator)
Measurement record (For measuring locations, see circuit diagram related to each failure code.)
Sensor (Measuring location on sen-
Charge pressure sen- R2: between (2) and (4)
sor
R1: between (1) and (4)
R2: Between (3) and (1)
Common rail pressure
R1: Between (1) (+) and
sensor
(2) (-)
64
40-200
Troubleshooting method for open circuit in wiring harness of pressure sensor system
sor pin
Sensor unit
sor pin side connetor)
200 General Information on troubleshooting
Measured internal resis-
tance of sensor (reference)
Approx. 100 z
Approx. 200 z
Approx. 23 kz
Approx. 10 Mz
Sensor + Wiring harness
(Measuring location on wir-
Measured value
ing harness side connector
of engine controller)
R2': Between (37) and (47)
(*)
R1': Between (44) and (47)
R2': Between (37) and (47)
(*)
R1': between (47)(+) and
(25)(-)
Remarks
Sensor is common to engine models
107 and 114
Sensor is common to engine models
107 and 114
If polarities are inverted, resistance is
infinite
Measured value
PC200, 200LC, 220, 220LC-8M0