Bosch 3.011 Instructions D'emploi page 35

The engine preconditioning and prechecks steps are preceded
by the following prompt: "INSERT PROBE".
Caution! Hot probe!
The exhaust-gas probe may still be very hot from being
used beforehand for testing a different vehicle.
Insert the exhaust-gas probe into the exhaust pipe and make sure
that it is seated securely.
Then confirm the prompt by pressing ENT.
Bringing the engine up to normal operating temperature
! If the engine is not brought up to the specified operating
temperature, there is a danger of it being damaged by
carrying out the exhaust-gas analysis test. Apart from that, all
the measured values subsequently gained may possibly be
incorrect.
To check that the engine temperature has reached the specified
value, use the oil-temperature sensor to measure the
oil temperature.
- Connect the oil-temperature sensor to plug-in socket 5 of the
VSM.
- Adjust the immersion depth of the oil-temperature sensor to
match that of the oil dipstick (see figure).
- Insert the oil-temperature sensor instead of the oil dipstick.
- The engine-oil temperature is displayed.
It is only possible to continue the test procedure once the
specified oil temperature has been exceeded.
Selecting the number of pulses and cylinders
To measure the engine speed (RPM), you must select the correct
number of pulses and cylinders to match the engine being tested.
This enables the rotational speed of the engine-speed sensor
connected to be identified. For details, see section 2.4, RPM
measurement (engine-speed measurement).
Before performing RPM measurement (engine-speed
measurement), always connect the B- clamp of the
battery connecting cable (B+/B-) to vehicle earth.
Select the number of pulses and cylinders
1, 2, 3, 4, 5, 6, 8, 10, 12, 16
using the cursor keys (z z /v z z z v v v ) and confirm by pressing ENT. v
Measuring the breakaway speed
Starting from idle speed, accelerate the engine carefully up to
breakaway speed.
! To avoid damaging the engine, accelerate the engine
slowly up to breakaway speed. If the max. tolerance is
exceeded, abort the procedure immediately!
The breakaway speed is now measured over a period of
3 seconds and a mean value is calculated.
If the breakaway speed is o.k., confirm it by pressing ENT. The
rev-up measurement is then started automatically.
If the breakaway speed is not o.k., confirm this by pressing the
z z v v
cursor keys z z and v z v , and then press ENT. v
The message "EXHAUST-GAS ANALYSIS TEST NOT PASSED"
appears in the display.
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