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GENERAL INFORMATION
4.2 SAFETY
4.2.1 TECHNICIAN SAFETY INFORMATION
WARNING: WHEN OPERATING, ENGINES
PRODUCE AN ODORLESS GAS CALLED
CARBON MONOXIDE. INHALING CARBON
MONOXIDE GAS CAN RESULT IN SLOWER
REACTION TIMES AND CAN LEAD TO
PERSONAL INJURY OR DEATH. WHEN THE
ENGINE IS OPERATING, KEEP SERVICE
AREAS WELL VENTILATED OR ATTACH THE
VEHICLE EXHAUST SYSTEM TO THE SHOP
EXHAUST REMOVAL SYSTEM.
Set the parking brake and block the wheel before
testing or repairing the vehicle. It is especially
important to block the wheels on front-wheel drive
vehicles; the parking brake does not hold drive
wheels. When servicing a vehicle, always wear eye
protection, and remove any metal jewelry such as
rings, watchbands or bracelets that might make an
inadvertent electrical contact. When diagnosing a
body system problem, it is important to follow
approved procedures where applicable. These pro-
cedures can be found in this General Information
Section or in the service manual procedures. Fol-
lowing these procedures is very important to safety
of individuals performing diagnostic tests.
4.2.2 VEHICLE PREPARATION FOR
TESTING
Make sure the vehicle being tested has a fully
charged battery. If it does not, false diagnostic
codes or error messages may occur.
4.2.3 SERVICING SUB-ASSEMBLIES
Some components of the body system are in-
tended to be serviced as an assembly only. Attempt-
ing to remove or repair certain system sub-
components may result in personal injury and/or
improper system operation. Only those compo-
nents with approved repair and installation proce-
dures in the service manual should be serviced.
4.2.4 DRBIII SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII
MULTIMETER
READ ALL DRBIII INSTRUCTIONS BEFORE
USING THE MULTIMETER. FAILURE TO
FOLLOW
THESE
RESULT IN PERSONAL INJURY OR DEATH.
•
Follow the vehicle manufacturer's service speci-
fications at all times.
•
Do not use the DRBIII if it has been damaged.
•
Do not use the test leads if the insulation is
damaged or if metal is exposed.
•
To avoid electrical shock, do not touch the test
leads, tips, or the circuit being tested.
•
Choose the proper range and functions for the
measurement. Do not try voltage or current
measurement that may exceed the rated capac-
ity.
•
Do not exceed the limits shown in the table
below:
FUNCTION
Volts
Ohms (resistance)*
Frequency Measured
Frequency Generated
Temperature
* Ohms cannot be measured if voltage is present.
Ohms can be measured only in a non-powered
circuit.
•
Voltage between any terminal and ground must
not exceed 500v DC or 500v peak AC.
•
Use caution when measuring voltage above 25v
DC or 25v AC.
•
Use the low current shunt to measure circuits up
to 10A. Use the high current clamp to measure
circuits exceeding 10A.
•
When testing for the presence of voltage or
current, make sure the meter is functioning
correctly. Take a reading of a known voltage or
current before accepting a zero reading.
•
When measuring current, connect the meter in
series with the load.
•
Disconnect the live test lead before disconnect-
ing the common test lead.
•
When using the meter function, keep the DRBI-
II away from spark plug or coil wires to avoid
measuring error from outside interference.
36
IS
DANGEROUS.
INSTRUCTIONS
CAN
INPUT LIMIT
0 - 500 peak volts AC
0 -1.12 megohms
0 -10 kHz
-58 - 1100°F
(-50 - 600°C)
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