Failure Code [Ca153] Chg Air Temp Sensor High Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [CA153] Chg Air Temp Sensor High Error

Action code Failure code
E15
Contents of • High voltage is detected in temperature signal circuit of boost pressure sensor and temperature sen-
trouble sor.
Action of con-
• Fixes charge temperature (46°C) and continues operation.
troller
Problem that
• Exhaust smoke is white
appears on
• Boost temperature-based engine protection function does not function.
machine
Related infor-
• Method of reproducing failure code: Starting switch ON.
mation
Defective [temperature sig-
1 nal circuit] of boost pressure
sensor, temperature sensor
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible causes
and standard
Short circuit in wiring har-
value in normal
3 ness (With another wiring
state
harness)
Defective wiring harness
4
connector
5 Defective engine controller
32
Trouble
CA153
Causes
Abnormally high level in charge temperature
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
C4 (male) Charge temperature
Between (3) – (4)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CE01 (female) (23)
– C4 (female) (3)
Wiring harness between CE01 (female) (47)
– C4 (female) (4)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between
CE01 (female) (23) – CE01 (female) (With all
connectors of wiring harness disconnected)
Connecting parts among boost pressure sensor, temperature sen-
sor, engine wiring harness, 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.
CE01 (female) Charge temperature
Between (23) – (47)
40 Troubleshooting
Resistance
0°C 5.5 – 6.1 kz
25°C 1.9 – 2.1 kz
40°C 1.1 – 1.2 kz
180 – 185 z
100°C
Resis-
tance
Resis-
tance
Resis-
tance
Resistance
0°C 5.5 – 6.1 kz
25°C 1.9 – 2.1 kz
40°C 1.1 – 1.2 kz
180 – 185 z
100°C
PC300, 350-8
1
Max. 10 z
Max. 10 z
Min.
100 kz