Failure Code [Ca1626] Bp Valve Sol Current High Error - Komatsu Galeo PC800-8 Shop Manual

SEN00791-02

Failure code [CA1626] BP Valve Sol Current High Error

Action code Failure code
E11 CA1626
Contents of
• There is short circuit in drive circuit of bypass valve solenoid.
trouble
Action of • Limits output and continues operation.
controller • Closes EGR valve and bypass valve.
Problem that
appears on • Output drops.
machine
Related
information
Defective bypass valve
1
solenoid (Internal trouble)
Disconnection in wiring
harness (Disconnection in
2
wiring or defective contact
in connector)
Possible causes
and standard
Ground fault in wiring har-
value in normal
3 ness (Short circuit with
state
GND circuit)
Hot short (Short circuit with
4 24V circuit) in wiring har-
ness
5 Defective engine controller
22
BP Valve Sol Current High Error
Trouble
(Engine controller system)
Cause
a Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
a Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (31) –
BP (female) (1)
Wiring harness between ENG (female) (11) –
BP (female) (2)
a Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (31) – BP
(female) (1) and chassis ground
Wiring harness between ENG (female) (11) – BP
(female) (2) and chassis ground
a Prepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between ENG (female) (31) – BP
(female) (1) and chassis ground
Wiring harness between ENG (female) (11) – BP
(female) (2) and chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Standard value in normal state/Remarks on troubleshooting
BP (male)
Between (1) – (2)
ENG (female)
Between (31) – (11)
40 Troubleshooting
Resistance
10 – 21 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage Max. 1 V
Voltage Max. 1 V
Resistance
10 – 21 z
PC800, 850-8