Page 343 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Scan tool using safety first!
This manual describes common test procedures used by experienced service technicians. Many test procedures
require precautions to avoid accidents that can result in personal injury, and/or damage to your vehicle or test
equipment. Always read your vehicle’s service manual and follow its safety precautions before and during any
test or service procedure. ALWAYS observe the following general safety precautions:

1 When an engine is running, it produces carbon
monoxide, a toxic and poisonous gas. To prevent
serious injury or death from carbon monoxide
poisoning, operate the vehicle ONLY in a well-
ventilated area.

2 To protect your eyes from propelled objects as well
as hot or caustic liquids, always wear approved
safety eye protection.

3 When an engine is running, many parts (such as
the coolant fan, pulleys, fan belt etc.) turn at high
speed. To avoid serious injury, always be aware
of moving parts. Keep a safe distance from these
parts as well as other potentially moving objects.

4 Engine parts become very hot when the engine is
running. To prevent severe burns, avoid contact
with hot engine parts.

5 Before starting an engine for testing or
troubleshooting, make sure the parking brake
is engaged. Put the transmission in park (for
automatic transmission) or neutral (for manual
transmission). Block the drive wheels with suitable
blocks.

6 Connecting or disconnecting test equipment when
the ignition is ON can damage test equipment and
the vehicle’s electronic components. Turn the
ignition OFF before connecting the Scan Tool to
or disconnecting the Scan Tool from the vehicle’s
Data Link Connector (DLC).

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CITS : Automotive - Mechanic Diesel - Lesson 104 - 107