Komatsu PC200-8M0 Shop Manual page 479

103 Testing and adjusting, Part 3
Preparation work for troubleshooting of electrical system
a Precautions for disconnecting connector
The direction of the lock of the connector
varies with the position of the sensor is
screwed in and the lock may face a direc-
tion in which it is difficult to unlock (on the
underside or engine side).
In this case, pinch the lock in direction (a)
with bent-nose nippers [1] (commercially
available), and the lock is reset.
Since the lock clicks when it is unlocked,
disconnect the connector after a click is
heard.
a Precautions for connecting connector
Take care not to connect the connector
reversely.
Engage lock (e) on the wiring harness side
with triangular notch (f) on the sensor side
(Do not engage lock (e) with square guide
(g) on the opposite side of triangular notch
(f)).
PC200, 200LC, 220, 220LC-8M0
9. Engine coolant temperature sensor (COOL-
ANT TEMP)
a Disconnection and connection of con-
nector
The connector of the engine coolant tem-
perature sensor has a special locking
mechanism. Disconnect it according to
steps (a) to (b) and connect it according to
steps (c) to (d) as shown below.
Disconnection: (a) Unlock – (b) Discon-
nect connector.
Connection: (c) Connect connector – (d)
Lock.
a Removal and installation of sensor
A deep socket is necessary for removal
and installation of the engine coolant tem-
perature sensor. See "Tools for testing,
adjusting, and troubleshooting".
SEN06129-01
7
30-103