Failure Code [Ca515] Rail Pressure Sensor Sup Volt High Error - Komatsu PC88MR-10 Shop Manual

Failure code [CA515] Rail Pressure Sensor Sup Volt High Error

400-A-Z0-A)
Action level Failure code
L03 CA515
Detail of
High voltage occurs in common rail pressure sensor power supply (5 V) circuit.
failure
Limits engine output and runs engine.
Action of
Limits the common rail pressure.
controller
Problem on
Engine output lowers.
machine
Related
Method of reproducing failure code: Turn starting switch to ON position.
information
No. Cause
Defective wiring harness
1
connector
Defective common rail
pressure sensor
2
(internal defect)
Defective wiring harness
3
Hot short circuit in wiring
4
harness
Defective engine controller
5
PC88MR-10
Rail Pressure Sensor Supply Voltage High Error
Failure
(Engine controller system)
Procedure, measuring location, criteria, and remarks
1. See descriptions of wiring harness and connectors in "c: Electrical
equipment" in "Checks before troubleshooting" of "Related
information on troubleshooting", and check it.
2. Turn starting switch to ON position.
If this failure code is not displayed, wiring harness connector is
defective.
a If this failure code is displayed, perform following checks.
1. Turn starting switch to OFF position.
2. Disconnect connector PFUEL.
3. Turn starting switch to ON position.
If this failure code disappears, sensor is defective.
a Other failure codes (many codes) are also displayed. They are
generated because of disconnection of connector. Ignore failure
codes other than this code.
1. Turn starting switch to OFF position.
2. Disconnect connector J2.
3. Turn starting switch to ON position.
If this failure code does not appear, wiring harness may be defective.
Perform following troubleshooting.
a Other failure codes (many codes) are also displayed. They are
generated because of disconnection of connector. Ignore failure
codes other than this code.
a If no failure is found by check on cause 3, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connector PFUEL, and connect T-adapter to female side
of connector.
3. Turn starting switch to ON position.
Voltage Between PFUEL (female) (1) and (3)
1. Turn starting switch to OFF position.
2. Disconnect connector J2 and connect T-adapter to male side.
3. Turn starting switch to ON position.
Voltage Between J2 (male) (31) and (21)
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC88MR-CA515-
4.75 to 5.25
V
4.7 to 5.25 V
40-185