Mercedes-Benz Sprinter / Dodge Sprinter. Manual - part 531
information available at the time of publication.
The right is reserved to make changes at any time
without notice.
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. If is especially
important to block the wheels on front-wheel drive
vehicles: the parking brake does not hold the drive
wheels.
Some operations in this manual require that
hydraulic tubes, hoses, and fittings, disconnected
for inspection or testing purposes. These systems,
when fully charged, contain fluid at high pressure.
Before disconnecting any hydraulic tubes, hoses,
and fittings, be sure that the system is fully depres-
surized.
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 Transmission system prob-
lem, it is important to follow approved procedures
where applicable. These procedures can be found in
the service information. Following these procedures
is very important to the safety of individuals per-
forming 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
DTC’s or error messages may occur. It is extremely
important that accurate shift lever position data is
available to the TCM. The accuracy of any DTC
found in memory is doubtful unless the Shift Lever
Test, performed on the DRBIII
t 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. 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 information should be serviced.
4.2.4
DRBIII
T SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII
T
MULTIMETER IS DANGEROUS. IT
CAN
EXPOSE
YOU
TO
SERIOUS
OR
POSSIBLY
FATAL
INJURY.
CAREFULLY
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
t 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.
FUNCTION
INPUT LIMIT
Volts
0-500 volts peak AC
0-500 volts DC
Ohms (resistance)*
0-1.12 megohms
Frequency measured
Frequency generated
0-10 khz
Temperature
-58-1100°F
-50-600C
*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 measured voltage above 25v
DC or 25v AC.
•
The circuit being tested must be protected by a
10A fuse or circuit breaker.
•
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.
6
GENERAL INFORMATION