Failure Code [Ca154] Chg Air Temp Sensor Low Error - Komatsu PC210-8 Shop Manual

UEN00240-01

Failure code [CA154] Chg Air Temp Sensor Low Error

User code Failure code
E15
Contents of
• Temperature signal circuit of boost pressure/temperature sensor detected low voltage.
trouble
Action of
• Fixes charge temperature value and continues operation.
controller
Problem that
• Exhaust gas becomes white.
appears on
• Engine protection function based on boost temperature does not work
machine
• Signal voltage on boost temperature side of boost pressure/temperature sensor can be checked with
Related infor-
monitoring function. (Code: 18501 Boost temperature sensor voltage)
mation
• Method of reproducing failure code: Turn starting switch ON.
Defective boost pressure/
1 temperature sensor [temper-
ature signal system]
Ground fault in wiring har-
2 ness (Short circuit with GND
circuit)
Possible causes
Short circuit in wiring har-
and standard
3 ness (with another wiring
value in normal
harness)
state
Defective wiring harness
4
connector
5 Defective engine controller
38
Trouble
CA154
Cause
Charge air temperature sensor low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
BOOST PRESS & IMT (male)
Between (2) – (1)
Between (2) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CE01 (female) (23)
– BOOST PRESS & IMT (female) (2)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CE01 (female) (23)
– each of CE01 (female) pins (With all wiring
harness connectors disconnected)
Connecting parts between boost pressure/temperature sensor –
engine wiring harness – engine controller may be defective. Check
them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
CE01 (female)
Between (23) – (47)
Between (23) – chassis ground
40 Troubleshooting
1
Resistance
0.18 – 160 kz
Min. 100 kz
Resis- Min. 100
tance kz
Resis- Min. 100
tance kz
Resistance
0.18 – 160 kz
Min. 100 kz
PC210, 230, 240-8