Failure Code [Ca2186] Throttle Sensor Power Supply Low Error - Komatsu WA250-6 Shop Manual

SEN03843-00

Failure code [CA2186] Throttle sensor power supply low error

Action code Failure code
E03 CA2186
Contents of
• Low voltage occurred in throttle sensor power supply circuit.
trouble
Action of • Runs the engine at position of throttle 0% when accelerator pedal is OFF and at 50% when it is ON.
controller
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
appears on
• The engine does not reach full throttle.
machine
Related
• Method of reproducing failure code: Turn the starting switch ON.
information
Ground fault in wiring har-
1 ness
(Contact with ground circuit)
Short circuit in wiring har-
Possible causes
2 ness
and standard
(with another wiring harness)
value in normal
state
Defective wiring harness
3
connector
4 Defective engine controller
46
40-330
Throttle sensor power supply voltage low error
Trouble
(Engine controller system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between EC2 (female) (22) –
PD1 (female) (1) and ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between EC2
(female) (9) – EC2 (female) (PD1 and 2, too,
is disconnected.)
Connecting parts among accelerator pedal, engine unit wiring har-
ness, 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
If causes 1 – 3 are not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
330 Troubleshooting by failure code (Display of code), Part 3
Failure code [CA2186] Throttle sensor power supply low error
Standard value in normal state/Remarks on troubleshooting
1
Resis- Min.
tance 100 kz
Resis- Min.
tance 100 kz
WA250, 250PZ-6