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