Code [432/Ca432] Idle Validation Process Error - Komatsu 114E-3 Series Shop Manual

SEN00460-01
E-34 Code [432/CA432] Idle Validation Process Error
Error code Failure code
432
Contents of
• Abnormality occurred in processing of idle validation switch circuit.
trouble
Action of
• Sets throttle angle to certain value and continues operation (depending on each model).
controller
Problem that
appears • Engine speed may not rise from low idle.
on machine
Related infor-
• Method of reproducing failure code: Starting switch ON, accelerator ON.
mation
1 Defective accelerator pedal
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible
causes and
standard value
Short circuit in wiring har-
in normal state
3 ness (With another wiring
harness)
Defective wiring harness
4
connector
5 Defective engine controller
14
Trouble
CA432
Causes
Abnormality in processing of idle validation processing
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
WAS1 (Male)
Between (2) – (1)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between J2 (female) (22) –
WAS1 (female) (1)
Wiring harness between J2 (female) (9) –
WAS1 (female) (2)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between J2
(female) (22) – J2 (female) (With also WAS1
disconnected)
Wiring harness among all pins between J2
(female) (9) – J2 (female) (With also WAS1
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
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J2 (Female)
Between (22) – (9)
40 Troubleshooting
Accelerator pedal
Release
Press
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Accelerator pedal
Release
Press
1
Resistance
1.5 – 3.0 kz
0.25 – 1.5 kz
Max. 10 z
Max. 10 z
Min.
100 kz
Min.
100 kz
Resistance
1.5 – 3.0 kz
0.25 – 1.5 kz
114E-3 Series