Code [153/Ca153] Charge Air Temp. Sensor High Error - Komatsu 114E-3 Series Shop Manual

SEN00459-01
E-9 Code [153/CA153] Charge Air Temp. Sensor High Error
Error code Failure code
153
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
value in normal
Short circuit in wiring har-
state
3 ness (With another wiring
harness)
Defective wiring harness
4
connector
5 Defective engine controller
16
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.
BOOST PRESS &
Charge temperature
IMT (male)
Between (A) – (B)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between J1 (female) (23) –
BOOST PRESS & IMT (female) (3)
Wiring harness between J1 (female) (47) –
BOOST PRESS & IMT (female) (4)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between J1
(female) (23) – J1 (female) (With all connec-
tors 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.
J1 (female) Charge temperature
Between (23) – (47)
40 Troubleshooting
Resistance
0°C 29 – 36 kz
25°C 9 – 11 kz
40°C 4.9 – 5.8 kz
600 – 700 z
100°C
Resis-
tance
Resis-
tance
Resis-
tance
Resistance
0°C 29 – 36 kz
25°C 9 – 11 kz
40°C 4.9 – 5.8 kz
600 – 700 z
100°C
114E-3 Series
1
Max. 10 z
Max. 10 z
Min.
100 kz