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1A-1 Engine General Information and Diagnosis:
Engine General Information and Diagnosis
Engine
Precautions on Engine Service
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
• Don't disconnect couplers from ECM, battery cable
from battery, ECM ground wire harness from engine
or main fuse before confirming diagnostic information
(DTC, freeze frame data, 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 or generic scan tool (Vehicle with immobilizer
Statement on Cleanliness and Care
An automobile engine is a combination of many
machined, honed, polished and lapped surfaces with
tolerances that are measured in the thousands of an
millimeter (ten thousands of an inch).
Accordingly, when any internal engine parts are
serviced, care and cleanliness are important.
It should be understood that proper cleaning and
protection of machined surfaces and friction areas is part
of the repair procedure. This is considered standard
shop practice even if not specifically stated.
Precautions
indicator lamp). Before using scan tool, read its
S3RH0A1100001
Operator's (Instruction) Manual carefully to have good
understanding as to what functions are available and
how to use it.
• Priorities for diagnosing troubles (Vehicle with
immobilizer indicator lamp)
If two or more DTCs are stored, proceed to the DTC
flow which has detected earliest in the order (it can be
identified by referring freeze frame data) and follow
the instruction in that flow.
If no instructions are given, troubleshoot DTCs
according to the following priorities.
– Diagnostic trouble codes DTCs other than DTC
P0171 / P0172 (Fuel system too lean / too rich),
DTC P0300 / P0301 / P0302 / P0303 / P0304
(Misfire detected) and DTC P0400 (EGR flow
malfunction)
– DTC P0171 / P0172 (Fuel system too lean / too
rich) and DTC P0400 (EGR flow malfunction)
– DTC P0300 / P0301 / P0302 / P0303 / P0304
(Misfire detected)
• Be sure to read "Precautions for Electrical Circuit
Service in Section 00" 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
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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.
General Description
• A liberal coating of engine oil should be applied to
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friction areas during assembly to protect and lubricate
the surfaces on initial operation.
• Whenever valve train components, pistons, piston
rings, connecting rods, rod bearings, and crankshaft
journal bearings are removed for service, they should
be retained in order.
At the time of installation, they should be installed in
the same locations and with the same mating
surfaces as when removed.
• Battery cables should be disconnected before any
major work is performed on the engine.
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