Failure Code [Ca435] Eng Oil Press Sw Error - Komatsu PC200-8M0 Shop Manual

SEN06134-00

Failure code [CA435] Eng Oil Press Sw Error

Action
Failure code
level
L01 CA435
q
Detail of failure Failure occurs in engine oil pressure switch signal circuit.
Action of con-
q
None in particular
troller
q
Problem on Protection function by engine oil pressure does not operate.
machine q Engine oil pressure monitor is not displayed normally.
q
Method of reproducing failure code: Turn starting switch to ON position or start engine.
q
Engine oil pressure switch is in CLOSED (ON) when oil pressure is low (when engine is stopped),
Related infor- but is in OPEN (OFF) when oil pressure is high (when engine is running).
q
mation To display this failure code, engine controller checks if engine oil pressure switch is in CLOSED
(ON), that is, if signal voltage is zero or not, only when engine is stopped.
q
Failure of engine oil pressure switch with engine running is shown by failure code [B@BAZG].
Cause
Defective wiring harness connec-
1
tor
Defective engine oil pressure
2
switch
Open or short circuit in wiring har-
3
ness
4 Defective engine controller
Circuit diagram related to engine oil pressure switch
26
40-302
Engine Oil Pressure Switch Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
See descriptions of wiring harness and connectors in "c: Electrical equipment"
in "Checks before troubleshooting" of "General information on troubleshoot-
ing", and check them.
1. Turn starting switch to OFF position.
2. Disconnect connector OIL PRESSURE SWITCH and connect T-adapter to
male side of connector.
Between OIL PRESSURE SWITCH (male) (1) and
ground
1. Turn starting switch to OFF position.
2. Disconnect connector ECM and connect T-adapters to female side.
Between ECM (female) (17) and ground
If no failure is found by above checks, engine controller is defective. (Since
this is an internal defect, troubleshooting cannot be performed.)
302 Troubleshooting by failure code, Part 2

Failure code [CA435] Eng Oil Press Sw Error

Resistance Max. 10 z
Resistance Max. 10 z
PC200, 200LC, 220, 220LC-8M0