Failure Code [Ca352] Sens Supply 1 Volt Low Error - Komatsu PC200-8M0 Shop Manual

SEN06134-00

Failure code [CA352] Sens Supply 1 Volt Low Error

Action
Failure code
level
L03 CA352
q
Detail of failure Low voltage appears in sensor power supply 1 circuit.
Action of con-
q
Takes ambient pressure to be at fixed value and allows engine to run.
troller
q
Problem on Engine output lowers.
machine q Engine starting performance becomes deteriorated.
Related infor-
q
Method of reproducing failure code: Turn starting switch to ON position.
mation
Cause
Defective wiring harness connec-
1
tor
2 Defective sensor or wiring harness
3 Defective engine controller
18
40-302
Sensor Power supply 1 Voltage Low 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 following connectors one by one and turn starting switch to ON
position each time.
3. After each troubleshooting, return to step 1.
If this failure code is not displayed when a sensor is disconnected, sensor or
engine wiring harness is defective.
a Other failure codes are displayed as well. This is because of disconnection
of connector. Ignore all failure codes other than [CA352].
Sensor or harness
Ambient pressure sensor
Engine wiring harness
1. Turn starting switch to OFF position.
2. Disconnect connector ECM and connect T-adapters to male side.
3. Turn starting switch to ON position with connector ECM disconnected.
Between ECM (male) (33) and (38)
302 Troubleshooting by failure code, Part 2

Failure code [CA352] Sens Supply 1 Volt Low Error

Connector
AMB. AIR PRESSURE
PC200, 200LC, 220, 220LC-8M0
ECM
Voltage 4.75 to 5.25V