Precautions; Harness Wire Connector - Hino Motors HINO 155 series Workshop Manual

ENGINE (J05E)/TROUBLESHOOTING
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PRECAUTIONS

! WARNING
Approximately 110V is generated for the injector drive actuation
system. For this reason, electrical shock may result if the injector
drive circuit is touched directly by hand. Set the starter key to the
LOCK position if it is necessary to check or repair the computer,
harnesses, or connectors.
1. BE CAREFUL NOT TO LET DIRT OR DUST GET INSIDE THE
ACTUATOR OR MAGNETIC VALVES.
2.

HARNESS WIRE CONNECTOR.

(1) Multi-contact connectors suitable for the small electrical sig-
nals of electronic circuitry are used for wiring connections to
the sensors, actuator and control unit. Be very careful when
handling them.
• Before disconnecting any connectors, make sure that the
starter key is in the "LOCK" position.
• When disconnecting connectors, try to pull them out in a
straight line, disengaging the lock and holding onto the
housing.
• Do not try to disconnect connectors by gripping the wires
or twisting them, as this could bend the contacts.
• Do not disconnect connectors unnecessarily.
• When using a circuit tester, apply the tester probe to the
harness wire side only. Never stick the tester probe into the
holes on the connector terminal side, as this could cause
poor contacts when the connector is reconnected.
How to use tester probe
• Do not let water, oil or dust get on the connector when it is
disconnected, as this could cause poor contacts when the
connector is reconnected.
• Do not open the control unit cover. It could malfunction if
dust or water gets inside.
• Take care to ensure that water, oil or dust do not get on or
inside parts.
• When connecting in connectors, push them in all the way
and make sure that the lock engages.
3. ERASING THE MALFUNCTION MEMORY STORED IN THE
PAST, CHECK THE CURRENT MALFUNCTION BY PERFORM-
ING A DIAGNOSIS OF THE PRESENT MALFUNCTION AGAIN.
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