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Lotus Service Notes Section EMN
Page 5
To Connect 'Lotus Check'
To connect the equipment, proceed as follows:
i). Plug the power harness into the scanner tool and the printer;
ii). Insert the MEMS 1.9 (standard engine) or MEMS 2J (VVC engine) programme card into the scanner tool
slot, label uppermost.
iii). Open the front and rear compartment lids;
iv). Connect the power harness crockodile clips to the battery in the front compartment;
v). Plug the adaptor harness into the 16 terminal diagnostic link connector (DLC);
vi). Select 'MEMS' on the adaptor harness switch;
vii). Press F2.
Pre-Test
Whenever the ignition is switched on, or the engine is running, the ECM monitors the readings of all the
sensor inputs, and compares them with pre-programmed tolerance bands. If any readings should fall outside
of these tolerances, the fault will be recorded in memory, and a substitute 'default' value used to enable the
engine to continue to run at a reduced performance level. If the fault is intermittent, and is no longer present
when the ignition is next turned on, the ECM will reinstate the sensor input, but will record the fault in memory.
Dependent on the nature of the fault, this may or may not have been noticed by the driver.
At each maintenance service, the 'Lotus Check' tool should be connected, and the Pre-Test selected from
the main menu to check whether any faults have been detected since the last Pre-Test. This test takes only a
few minutes, during which the scanner display will ask a series of questions and issue instructions to guide the
operator through the test, which is self explanatory, with the following special notes;
'Is fuel rail temperature sensor fitted?' - answer 'NO'.
'How many cooling fans are fitted?' - answer '1'.
References to a 'current clamp' are not applicable in this application - answer 'Proceed'.
After the test has been run, a print out should be obtained as the results are not displayed in any other
manner. If any 'default flags' are shown, the Pre-Test should be run again to establish whether the fault is still
current. If not current (i.e. the fault is intermittent, and is no longer detected), the memory will be cleared of the
default flag, and the next time the test is run, no flag will be shown. Be aware that if a successful repair is
made, the next time a Pre-Test is run, the fault will still be flagged, as having been detected since the previous
Adaptor harness
plugged into DLC MEMS 1.9
& switched to Power or MEMS 2J
'MEMS' harness programme
card
Printer
Connect to battery Scanner tool em192