Failure Code [Ca2185] Throttle Sensor Supply Voltage High Error - Komatsu WA250-6 Shop Manual

SEN03843-00

Failure code [CA2185] Throttle sensor supply voltage high error

Action code Failure code
E03 CA2185
Contents of
• High voltage (min. 5.25V) 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
Short circuit in wiring har-
1 ness
(with another wiring harness)
Possible causes
and standard
value in normal
state
Defective wiring harness
2
connector
3 Defective engine controller
44
40-330
Throttle sensor supply voltage high error
Trouble
(Engine controller system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between EC2
(female) (22) – EC2 (female) (PD1 and 2,
too, is disconnected.)
Between EC2 (female) (22) – EC3 (female)
(3) (PD1 and 2, too, is disconnected.)
Connecting parts among accelerator pedal dial, engine unit 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
If causes 1 – 2 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 [CA2185] Throttle sensor supply voltage high error
Standard value in normal state/Remarks on troubleshooting
1
Resis- Min.
tance 100 kz
Resis- Min.
tance 100 kz
WA250, 250PZ-6