Scan Tool Operating Instructions - AK Automotive Training

Manufacturer Applications
Self Test
The purpose of the self test is for the control module to run an internal test that will
check the module inputs and outputs for fault conditions. The module will activate
outputs and monitor inputs to determine faults such as open/short circuits etc. The
self test should have been completed within a maximum of 30 seconds. After the
completion of the self test then all of the control modules outputs are returned to their
initial state.
NOTE: Some control modules will require certain conditions to be met for the test to
be successfully passed. Generally all switches should remain off.
GEM (General Electric Module) - All doors should be open, bonnet and boot closed.
Rear wash wiper set to intermittent. Press and hold the hazard warning light switch.
HEC (Hybrid Electronic Cluster) - Sports / Economy switch cycled if fitted.
NOTE: If the self test indicates a result code then this may be due to the conditions
for the test not being correct and not the control module.
Engine Management Guide
If there is doubt as to which engine management system is fitted to the vehicle under
test but the vehicle has a J1962 connector (16-pin), examine the connector. If pins 2
and 10 are fitted, the vehicle is EEC V but if pins 3 and 11 are fitted, the vehicle is
EEC IV - DCL.
NOTE: The Ford Galaxy 1.9 TDi with a VW engine is only accessible via the VAG
application.
The OmiCheck will attempt to establish serial communications with the vehicle. Once
established, follow the on-screen instructions for each test.
NOTE: If the ECU detects a fault then the live data may be set to a default value.
Check the fault codes and rectify any problems before using the live data values.
Selection of Diagnostic System
Ford traditionally used EECIV (Electronic Engine Control, version 4) on all their
vehicles from the early 1980s until the mid 1990s. The Ford diagnostic unit at this time
was called a STAR tester, (Self Test Automatic Read-out). It only showed either a 2
or 3 digit code, which the technician looked up in a table to get the description. No live
data or component tests were available.
Around 1994, Ford introduced a more advanced system called EECV (Electronic
Engine Control, version 5). This system was only fitted to some vehicles. Ford then
merged the two systems, which was known by various names. Amongst these are
EECIV1/2, EECIV enhanced and DCL (Data Communications Link). For these
systems Ford use the WDS (World Diagnostic System) diagnostic tool, these systems
show live data and have limited component tests.
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