Suzuki 2006 SX4, Service Manual

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Engine General Information and Diagnosis: 1A-1
Engine
Engine General Information and Diagnosis
Precautions
Precautions on Engine Service
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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 could possibly 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.
• When disconnecting couplers, don’t pull wire harness
but make sure to hold coupler itself. With lock type
coupler, be sure to unlock before disconnection.
Attempt to disconnect coupler without unlocking may
result in damage to coupler. When connecting lock
type coupler, insert it till clicking sound is heard and
connect it securely.
• According to the specification / market of the vehicle,
immobilizer system parts may not be equipped.
Be sure to keep it in mind during servicing the vehicle.
Precaution on On-Board Diagnostic (OBD)
System
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There are two types of On-Board Diagnostic (OBD)
system, Euro OBD system and non-Euro-OBD system,
depending on the vehicle specification.
It is possible to identify each OBD system by checking if
it is Gulf Cooperation Council (GCC) spec. or not.
• Euro OBD model is Non-GCC spec.
• Non-Euro OBD model is GCC spec.
As the diagnosis function is different between these two
types, be sure to fully understand the OBD system
referring to “On-Board Diagnostic System Description”.
OBD System Summary Table
Precautions in Diagnosing Trouble
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NOTE
There are two types of OBD system
depending on the vehicle specification.
For identification, refer to “Precaution on On-
Board Diagnostic (OBD) System”.
• Don’t disconnect ECM 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 CAN communication OBD generic 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.
• For Euro OBD model, it is indistinguishable which
module turns on MIL because not only ECM but also
TCM turns on MIL (For details of on-board diagnostic
system for A/T model, refer to “On-Board Diagnostic
System Description in Section 5A”).
IYSQ01110001-01
Euro OBD
model (Non-
GCC spec.)
Non-Euro-
OBD model
(GCC spec.)
Quantity of DTC
related to engine
control Approx. 100 Approx. 50 to
80
Freeze frame data Available Not available
SUZUKI scan tool
(SUZUKI- SDT) Available Available
CAN communication
OBD generic scan
tool Available Not available