Komatsu SAA6D114E-3 - Code [435;CA435] Eng. Oil Switch Error

SEN00460-01 40 Troubleshooting
16 114E-3 Series
E-35 Code [435/CA435] Eng. Oil Switch Error 1
Circuit diagram related to engine oil pressure switch
Error code Failure code
Trouble Abnormality in engine oil pressure switch
435 CA435
Contents of
trouble
• Abnormality occurred in engine oil pressure switch signal circuit.
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• Engine oil pressure switch-based engine protection function does not function.
Related infor-
mation
• Method of reproducing failure code: Starting switch ON or start engine
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective engine oil pressure
switch
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
OIL PRESSURE SWITCH (male) Resistance
Between (1) – body Max. 10 z
2
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
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)
Resis-
tance
Max. 10 z
3
Short circuit in wiring har-
ness (With another wiring
harness)
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)
Resis-
tance
Min.
100 kz
4
Defective wiring harness
connector
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
5 Defective engine controller
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
OIL PRESSURE SWITCH (male) Resistance
Between (1) – body Max. 10 z