Leak Test - Bosch ETT 008.31 Repair Instructions

4.1.1 Leak test

Press
"SELECT"
1 x
10
Display
5P. L E.Ei
6A5 L E.Ei
Abd. L E.Ei
LEC L E.Ei
i.0. L E.Ei
Meaning/function
The pump starts up.
The analysis system is purged for 20 sec. with zero gas
6A5 6A5 6A5 6A5" flashes to prompt the flow of test gas.
The display "6A5
- Either suck up car exhaust gas*) via the exhaust sample
probe (the test gas pump can be switched on with the
"Enter o o o o o " button and switched off with the "Test u u u u u "
button.
- Or introduce test gas (with a proportion of 10-15% vol.
CO ) via the calibration-gas inlet (set admission pressure
2
on bottle-pressure reducer to 0.7 bar).
Once the analyzer recognizes the flow of CO
changes to a continuous display.
*) Use only test gas no. 1 for the half-yearly test, see
Section 6
After a flow time of 20 seconds, the display switches to
Abd. Abd. Abd." seal ("abdichten"). Abd.
"Abd.
- The analyzer automatically terminates flow through the
exhaust-sample probe via the pump by switching off the
pump.
- Manual flow through the calibration inlet must be termina-
ted manually.
In either of the above cases, the test-gas inlet must be sealed
off (e.g. by bending the intake hose).
The analyzer must be informed that the inlet has been sealed
off. To do this, press "Enter o ".
The analyzer checks air-tightness (approx. 40 seconds) with
the pump running.
i.0 i.0 i.0 i.0 " (OK) is displayed if the exhaust-sample intake system
"i.0
is sufficiently air-tight.
If error messages appear, perform trouble-shooting to
Section 8.
Err 1 Err 1 = Large leak Err 1 Err 1 Err 1
Err 2 Err 2 = Small leak Err 2
Err 2 Err 2
, the flashing
2