Dodge ZB 2005 Service Manual page 1133

GENERAL INFORMATION
4.2 SAFETY
4.2.1 TECHNICIAN SAFETY INFORMATION
WARNING: ENGINES PRODUCE CARBON
MONOXIDE THAT IS ODORLESS, CAUSES
SLOWER REACTION TIME, AND CAN LEAD
TO SERIOUS INJURY. 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 wheels 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 the drive
wheels.
When servicing a vehicle, always wear eye pro-
tection, and remove any metal jewelry such as
watchbands or bracelets that might make an inad-
vertent electrical contact.
When diagnosing a powertrain system problem,
it is important to follow approved procedures where
applicable. These procedures can be found in the
service manual procedures. Following these proce-
dures is very important to the 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 powertrain system are
intended to be serviced in assembly only. Attempt-
ing to remove or repair certain system sub-
components may result in personal injury and/or
improper system operation. Only those components
with approved repair and installation procedures in
the service manual should be serviced.
4.2.4 DRBIII SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII MULTIMETER IS DANGEROUS. IT
CAN EXPOSE YOU TO SERIOUS INJURY.
CAREFULLY READ AND UNDERSTAND THE
CAUTIONS AND
LIMITS.
Follow the vehicle manufacturer's service specifi-
cations at all times.
THE SPECIFICATION
• 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 function for the
measurement. Do not try voltage or current mea-
surements that may exceed the rated capacity.
• 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.
• A 10A fuse or circuit breaker must be used to
protect the circuit being tested.
•
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 cur-
rent, make sure the meter is functioning cor-
rectly. 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 disconnecting
the common test lead.
• When using the meter function, keep the
DRBIII away from spark plug or coil wires to
avoid measuring error from outside interference.
4.3 WARNINGS AND CAUTIONS
4.3.1 ROAD TEST WARNINGS
Some complaints will require a test drive as part
of the repair verification procedure. The purpose of
the test drive is to try to duplicate the diagnostic
code or symptom condition.
12
INPUT LIMIT
0 - 500 peak volts AC
0 - 500 volts DC
0 - 1.12 megohms
0 - 10 kHz
-50 - 600°C
-58 - 1100°F