Komatsu PC88MR-10 Shop Manual page 523

a Precautions for disconnection of connectors
The direction of the lock for connector may
be changed toward the difficult direction
(facing to the bottom or to the engine side)
for unlocking depending on the position
where the sensor is screwed in.
In such a case, turn the lock to the direction
(a) by using the needle nose pliers with
curved tip (commercially available) [1], then
the lock can be canceled easily.
Since the lock is canceled with "click" sound,
listen the sound
connectors.
a Precautions for connecting connectors
When connecting connectors, pay attention
not to connect the connectors reverse.
Engage lock portion (e) on the harness side
to triangle notch portion (f). (Pay attention not
to take square guide portion (g) on the
opposite side of triangle notch portion (f) by
mistake.)
PC88MR-10
and disconnect the
Related information on troubleshooting
10.Engine coolant temperature sensor (TWTR)
a Disconnection and connection of connectors
The connector
temperature 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 and (b) disconnect
the connectors.
Connection: (c) Connect the connectors and
(d) engage the lock.
a Removal and installation of sensor body
Since a deep socket is necessary when
removing and installing the engine coolant
temperature sensor, see "Tools for testing,
adjusting, and troubleshooting".
40 Troubleshooting
of the engine coolant
40-35