Failure Code [Ca153] Chg Air Temp Sensor High Error - Komatsu PC200-8M0 Shop Manual

SEN06133-00

Failure code [CA153] Chg Air Temp Sensor High Error

Action
Failure code
level
L03 CA153
q
High voltage appears in temperature signal circuit of charge (boost) pressure & temperature sen-
Detail of failure
sor.
Action of con-
q Takes boost temperature to be at fixed value and allows engine to run.
troller
Problem on
q
Engine protection function based on boost temperature does not work.
machine
q
Input voltage from boost temperature sensor can be checked with monitoring function.
(Code: 18501 (V))
q
Temperature sensed by boost temperature sensor can be checked with monitoring function.
(Code: 18500(°C))
Related infor-
q
Method of reproducing failure code: Turn starting switch to ON position.
mation
q
Because troubleshooting "socket" for this sensor features female connector alone, it is not connect-
able to female connector of sensor wiring harness, and thus not usable for checking open circuit
(not designed as a T-adapter).
q
This failure code is displayed if temperature sensor connector is disconnected.
Cause
Defective wiring harness connec-
1
tor
Defective charge temperature sen-
2
sor
Open or short circuit in wiring har-
3
ness
4 Defective engine controller
32
40-301

Failure code [CA153] Chg Air Temp Sensor High Error

Charge Air Temperature Sensor High Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
See descriptions of wiring harness and connectors in "c: Electrical equipment"
in "Checks before troubleshooting" of "General information on troubleshoot-
ing", and check them.
1. Turn starting switch to OFF position.
2. Disconnect connector BOOST PRESS & IMT, and connect socket to male
side.
Between BOOST
PRESS & IMT (male) (3)
and (4)
a Boost
tempera-
ture-Resistance cha-
riacteristic
1. Turn starting switch to OFF position.
2. Disconnect connector ECM and connect T-adapters to female side.
Between ECM (female) (23) and (47)
a Use "Boost temperature-Resistance character-
istics" table shown above as resistance criteria.
If no failure is found by above checks, engine controller is defective. (Since
this is an internal defect, troubleshooting cannot be performed.)
301 Troubleshooting by failure code, Part 1
-40 °C Resistance
-20 °C Resistance
0 °C Resistance
30 °C Resistance
60 °C Resistance
90 °C Resistance
130 °C Resistance
Resis-
tance
PC200, 200LC, 220, 220LC-8M0
41 to 48 kz
14 to 16 kz
5.4 to 6.1 kz
1.6 to 1.8 kz
560 to 600 z
230 to 250 z
80 to 90 z
80 z to 48 kz