Suzuki 2007 XL7, Service Manual

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1C-6 Engine Electrical Devices:
Electrostatic Discharge (ESD) Damage
NOTE
In order to prevent possible electrostatic
discharge damage to the ECM, DO NOT touch
the connector pins on the ECM.
The electronic components that are used in the control
systems are often designed to carry very low voltage.
The electronic components are susceptible to damage
caused by electrostatic discharge. Less than 100 volts of
static electricity can cause damage to some electronic
components. By comparison, it takes as much as 4,000
volts for a person to even feel the zap of a static
discharge.
There are several ways for a person to become statically
charged. The most common methods of charging are by
friction and by induction. An example of charging by
friction is a person sliding across a car seat.
Charging by induction occurs when a person with well
insulated shoes stands near a highly charged object and
momentarily touches ground. Charges of the same
polarity are drained off leaving the person highly charged
with the opposite polarity. Static charges can cause
damage, therefore, it is important to use care when
handling and testing electronic components.
Emissions Control Information Label
The underhood Vehicle Emissions Control Information
Label contains important emission specifications and
setting procedures. In the upper left corner is the
exhaust emission information. This identifies the year,
the manufacturing division of the engine, the
displacement of the engine in liters, the class of the
vehicle, and type of fuel metering system. There is also
an illustrated emission components and vacuum hose
schematic.
This label is located in the engine compartment of this
vehicle.
Underhood Inspection
NOTE
This inspection is very important and must
be done carefully and thoroughly.
Perform a careful underhood inspection when
performing any diagnostic procedure or diagnosing the
cause of an emission test failure. This can often lead to
repairing a condition without further steps. Use the
following guidelines when performing an inspection:
• Inspect all of the vacuum hoses for correct routing,
pinches, cuts, or disconnects.
• Inspect any hoses that are difficult to see.
• Inspect all of the wires in the engine compartment for
the following conditions:
– Burned or chafed spots
– Pinched wires
– Contact with sharp edges
– Contact with hot exhaust manifolds
Basic Knowledge Required
CAUTION
!
Lack of basic knowledge of this powertrain
when performing diagnostic procedures
could result in incorrect diagnostic
performance or damage to powertrain
components. Do not attempt to diagnose a
powertrain problem without this basic
knowledge.
A basic understanding of hand tools is necessary in
order to effectively use this section of the Service
Manual.
You must be familiar with some of the basics of engine
operation and electrical diagnosis in order to use this
section of the service manual.
• Basic electrical circuits—You should have an
understanding of basic electricity and know the
meaning of voltage (volts), current (amps), and
resistance (ohms). You should understand what
happens in a circuit with an open or a shorted wire,
and you should be able to identify a shorted or open
circuit by using a DMM. You should be able to read
and understand a wiring diagram.
• Use of digital multimeter—You should be familiar with
the DMM, particularly the essential tool. You should
be able to use the meter in order to measure the
voltage (volts), the resistance (ohms), the current
(amps), intermittents (min/max), and frequency
(Hertz).
• Use of circuit testing tools—You should not use a test
lamp to diagnose the engine controls system unless
you are specifically instructed to do so. You should
know how to the use jumper wires in order to test the
components and allow the DMM readings without
damaging the terminals. You should know how to use
the J 35616 connector test adapter kit and use the kit
whenever the diagnostic procedures call for front
probing any connector.