Suzuki Liana RH418, Supplementary Service Manual

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1A-1 Engine General Information and Diagnosis:
Engine General Information and Diagnosis
Precautions
Precautions on Engine Service
S3RH0B1100001
CAUTION
!
The following information on engine service
should be noted carefully, as it is important in
preventing damage, and in contributing to
reliable engine performance.
• When raising or supporting engine for any reason, do
not use a jack under oil pan. Due to small clearance
between oil pan and oil pump strainer, jacking against
oil pan may cause it to be bent against strainer
resulting in damaged oil pick-up unit.
• It should be kept in mind, while working on engine,
that 12-volt electrical system is capable of violent and
damaging short circuits.
When performing any work where electrical terminals
can be grounded, ground cable of the battery should
be disconnected at battery.
• Any time the air cleaner, throttle body or intake
manifold is removed, the intake opening should be
covered. This will protect against accidental entrance
of foreign material which could follow intake passage
into cylinder and cause extensive damage when
engine is started.
Precautions in Diagnosing Trouble
S3RH0B1100002
• Don’t disconnect couplers from ECM, battery cable
from battery, ECM ground wire harness from engine
or main fuse before confirming diagnostic information
(DTC, etc.) stored in ECM memory. Such
disconnection will erase memorized information in
ECM memory.
• Diagnostic information stored in ECM memory can be
cleared as well as checked by using SUZUKI scan
tool. Before using scan tool, read its Operator’s
(Instruction) Manual carefully to have good
understanding as to what functions are available and
how to use it.
• Be sure to read “Precautions for Electrical Circuit
Service in Section 00 in related manual” before
inspection and observe what is written there.
• ECM Replacement
When substituting a known-good ECM, check for the
following conditions. Neglecting this check may cause
damage to a known-good ECM.
– Resistance value of all relays, actuators is as
specified respectively.
– MAP sensor and TP sensor are in good condition
and none of power circuits of these sensors is
shorted to ground.