Failure Code [Ca516] Rail Pressure Sensor Sup Volt Low Error - Komatsu PC88MR-10 Shop Manual

Failure code [CA516] Rail Pressure Sensor Sup Volt Low Error

400-A-Z0-A)
Action level Failure code
L03 CA516
Detail of
Low voltage appears 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
1 Defective harness connector
Defective common rail
pressure sensor
2
(internal defect)
Defective wiring harness
3
Ground fault in wiring harness
4
(contact with ground circuit)
Short circuit in wiring harness
5
Defective engine controller
6
PC88MR-10
Rail Pressure Sensor Supply Voltage Low 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 "General
information on troubleshooting", and check it.
2. Turn starting switch to ON position.
If this failure code disappears, harness connector is defective.
a If this failure code appears, 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 connectors J2 and PFUEL, and connect T-adapter to
female side of either connector.
Between ground and J2 (female) (31) or
Resis-
PFUEL (female) (1)
tance
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 connectors J2 and PFUEL, and connect T-adapter to
female side of either connector.
Between J2 (female) (21) and (31), or
Resis-
between PFUEL (female) (1) and (2)
tance
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-CA516-
Min. 1 Mz
Min. 1 Mz
4.7 to 5.25
V
40-187