SEN00459-01 40 Troubleshooting
18 114E-3 Series
E-10 Code [154/CA154] Charge Air Temp. Sensor Low Error 1
Error code Failure code
Trouble Abnormally low level in charge temperature
154 CA154
Contents of
trouble
• Low voltage is detected in temperature signal circuit of boost pressure sensor and temperature sen-
sor.
Action of con-
troller
• Fixes charge temperature (46°C) and continues operation.
Problem that
appears on
machine
• Exhaust smoke is white
• Boost temperature-based engine protection function does not function.
Related infor-
mation
• Method of reproducing failure code: Starting switch ON.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective [temperature sig-
nal circuit] of boost pressure
sensor, temperature sensor
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
BOOST PRESS &
IMT (male)
Charge temperature Resistance
Between (A) – (B)
0°C 29 – 36 kz
25°C 9 – 11 kz
40°C 4.9 – 5.8 kz
100°C 600 – 700 z
Between (3) –
chassis ground
All range Min. 100 kz
2
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
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)
Resis-
tance
Min.
100 kz
3
Short circuit in wiring har-
ness (With another wiring
harness)
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)
Resis-
tance
Min.
100 kz
4
Defective wiring harness
connector
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
5 Defective engine controller
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J1 (female) Charge temperature Resistance
Between (23) – (47)
0°C 29 – 36 kz
25°C 9 – 11 kz
40°C 4.9 – 5.8 kz
100°C 600 – 700 z
Between (23) –
chassis ground
All range Min. 100 kz
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