Code [435/Ca435] Eng. Oil Switch Error - Komatsu 114E-3 Series Shop Manual

SEN00460-01
E-35 Code [435/CA435] Eng. Oil Switch Error
Error code Failure code
435
Contents of
• Abnormality occurred in engine oil pressure switch signal circuit.
trouble
Action of con-
• None in particular.
troller
Problem that
appears on • Engine oil pressure switch-based engine protection function does not function.
machine
Related infor-
• Method of reproducing failure code: Starting switch ON or start engine
mation
Defective engine oil pressure
1
switch
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible causes
Short circuit in wiring har-
and standard
3 ness (With another wiring
value in normal
harness)
state
Defective wiring harness
4
connector
5 Defective engine controller
Circuit diagram related to engine oil pressure switch
16
Trouble
CA435
Causes
Abnormality in engine oil pressure switch
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
OIL PRESSURE SWITCH (male)
Between (1) – body
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between J1 (female) (17) –
OIL PRESSURE SWITCH (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between J1
(female) (17) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Connecting parts among engine oil pressure switch, engine wiring
harness, and engine controller are suspected. Inspect them directly.
• Loose connector, broken lock, broken seal
• Corrosive, bent, broken, forced-in, or extended pin
• Humidity in connector, entry of dirt or dust, poor insulation
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
OIL PRESSURE SWITCH (male)
Between (1) – body
40 Troubleshooting
1
Resistance
Max. 10 z
Resis-
Max. 10 z
tance
Resis- Min.
tance 100 kz
Resistance
Max. 10 z
114E-3 Series