Chrysler 300M 2002 Service Manual page 2819

GENERAL INFORMATION
found in memory is doubtful unless the Shift Lever
Test, performed on the DRBIII Scan Tool, passes
without failure.
4.2.3 SERVICING SUB-ASSEMBLIES
Some components of the Transmission system
are intended to be serviced in assembly only. At-
tempting 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 instructions should be ser-
viced.
4.2.4 DRBIII SAFETY INSTRUCTIONS
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII MULTIMETER IS DANGEROUS. IT
CAN EXPOSE YOU
POSSIBLY FATAL
READ AND UNDERSTAND THE CAUTIONS
AND THE SPECIFICATION LIMITS.
•
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 function for the
measurement. Do not try voltage or current
measurements that may exceed the rated capac-
ity.
•
Do not exceed the limits shown in the table.
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 peak AC.
• Use caution when measuring voltage above 25v
DC or 25v AC.
• The circuit being tested must be protected by a
10A fuse or circuit breaker.
TO SERIOUS OR
INJURY. CAREFULLY
INPUT LIMIT
0 - 500 peak volts AC
0 - 500 volts DC
0 - 1.12 megohms
0 - 10 kHz
-58 - 1100°F
-50 - 600°C
• Use the low current shunt to measure circuits up
to 10A. Use the high current clamp to measure
circuits exceeds 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 attempting 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
DRBIII away from spark plug or coil wires to
avoid measuring error from outside interference.
4.3 WARNINGS
4.3.1 VEHICLE DAMAGE WARNINGS
Before disconnecting any control module, make
sure the ignition is "lock" position. Failure to do so
could damage the module.
When testing voltage or continuity at any control
module, use the terminal side (not the wire end) of
the connector. Do not probe a wire through the
insulation; this will damage it and eventually
cause it to fail because of corrosion.
Be careful when performing electrical tests so as
to prevent accidental shorting of terminals. Such
mistakes can damage fuses or components. Also, a
second code DTC could be set, making diagnosis of
the original problem more difficult.
When replacing a blown fuse, it is important to
use only a fuse having the correct amperage rating.
The use of a fuse with a rating other than indicated
may result in a dangerous electrical system over-
load. If a properly rated fuse continues to blow, it
indicates a problem in the circuit that must be
corrected.
4.3.2 ROAD TEST COMPLAINT VEHICLE
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
DTC or symptom condition.
CAUTION: Before road testing a vehicle, be
sure that all components are reassembled.
During the test drive, do not try to read the
DRBIII screen while in motion. Do not hang
the DRBIII from the rear view mirror or
operate it yourself. Have an assistant
available to operate the DRBIII .
Road testing is an essential step in the diagnos-
tic process that must not be overlooked. Along with
diagnostic information obtained from the DRBIII
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