Downloaded from www.Manualslib.com manuals search engine Fuel pump prime time : 2 +/- 0.2 seconds
Immobiliser arming : Automatic; de-arming after success-
ful communication with the ACUProtection : All input and output terminals are protectedagainst accidental shorts to ground or battery voltage exceptthe following :- diagnostic lamp to 12 volt - coil drive to 12 volt
Default mode selection : Automatic in the event of a
sensor failure
Diagnostics initialisation : Short line on ALDL plug to ground
before starting engine
Diagnostics : Tell tale lamp
: D-TEQ200 PC based intelligent system
: C-TEQ200 Component tester
4.2 Environmental
Operating temperature : -25ø to +85ø Celsius
Water resistance : Splash proof
4.3 Fuel delivery
Pump : AC Rochester pump fitted in the fuel tank. P/NFuel pressure : 100 kPa
Downloaded from www.Manualslib.com manuals search engine 6.6 Dwell time calculation
Dwell time is the time during which the battery voltage must
be applied to the ignition coil's primary winding prior to
an ignition pulse. The correct dwell time is important to
ensure constant spark energy.
The correct dwell time depends on the battery voltage. A
look-up matrix contains dwell time versus battery voltage.
The prevailing battery voltage is measured and compared with
the voltages stored in the dwell look-up matrix. The corre-
sponding dwell time is used to energise the ignition coil.
6.7 Engine water temperature measurement
EWT measurement is accomplished by a NTC (Negative
Temperature Coefficient) sensor mounted on the engine block.
The base advance angles are increased with decreasing
engine temperatures. This is necessary because it takes
longer to reach maximum cylinder pressure after ignition
when an engine is cold. Typical additional advance required
for an engine at -20ø Celsius ranges from 3ø to 8ø with
respect to an engine operating at 100ø Celsius.
