Preparation For Troubleshooting Of Electrical System - Komatsu PC88MR-10 Shop Manual

Preparation for troubleshooting of electrical system

a When performing troubleshooting of electrical
system of machine monitor, engine controller,
pump controller and KOMTRAX communication
modem related, expose applicable connector
portion according to the following procedure.
a For connectors whose lock method is special,
perform disconnection and connection.
Preparation
1. Machine monitor
1) Remove 3 mounting screws of cover (1).
a One of the 3 screws is covered with cap
(2).
a Disconnect connector P31 of sunlight
sensor and remove cover (1).
2) Remove a mounting bolt and duct (6).
3) Insert a flat-head screwdriver in slit (3) and
pull it upward to remove cover (5) while
releasing lug (4).
PC88MR-10
Related information on troubleshooting
(PC88MR-C050-001-K-00-A)
4) Insert or connect troubleshooting T-adapters
to connectors CM01, CM02, and CM04 on
machine monitor (7).
2. Engine controller
1) Open the engine hood.
a The engine controller is mounted on the
engine.
2) Insert or connect troubleshooting T-adapters
into or to connectors J1, J2, and CE03 of
engine controller (8).
a Since the connectors is secured with
screws, loosen them before
disconnecting the connector.
a When restore them, tighten the screws to
the specified torque.
Screw:3 ± 1 Nm {0.3 ± 0.1 kgm}
40 Troubleshooting
40-31