Failure Code [Ca153] Charge Air Temp. Sensor High Error - Komatsu Galeo PC138US-8 Shop Manual

40 Troubleshooting

Failure code [CA153] Charge air temp. sensor high error

User code Failure code
E15
Contents of
• High voltage was detected in charge temperature sensor circuit.
trouble
Action of
• Fixes charge temperature (intake air temperature) (70°C) and continues operation.
controller
Problem that
appears on
machine
• Signal voltage of charge temperature sensor can be checked with monitoring function.
Related
(Code: 18501 Boost temperature sensor voltage)
information
• Method of reproducing failure code: Turn starting switch ON.
Defective charge tempera-
1
ture sensor (Internal trouble)
Disconnection in wiring
Possible causes harness
and standard 2 (Disconnection in wiring or
value in normal defective contact in connec-
state tor)
Ground fault in wiring har-
3 ness (Short circuit with GND
circuit)
4 Defective engine controller
Circuit diagram related
PC138US, USLC-8
Trouble
CA153
Cause
Charge air temp. sensor high error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
PTIM (male)
Between (3) – (4)
Between (3) –
chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (11)
– PTIM (female) (3)
Wiring harness between CE01 (female) (48)
– PTIM (female) (4)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (11)
– PTIM (female) (3) and chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CE01 (female)
Between (11) – (48)
SEN02463-01
Intake air
Resistance
temperature
10 – 100°C 0.5 – 20 kz
All range Min. 1 Mz
Resis-
tance
Resis-
tance
Resis-
tance
Intake air
Resistance
temperature
10 – 100°C 0.5 – 20 kz
1
Max. 1 z
Max. 1 z
Min. 1 Mz
23