Section 06 ENGINE MANAGEMENT (RFI)
Subsection 02 (DIAGNOSTIC PROCEDURES )
DIAGNOSTIC PROCEDURES
INTRODUCTION
The ECU is able to detect malfunctions in the sen-
sor network. The malfunction is recorded in the
memory of the ECU as fault codes.
SELF-DIAGNOSTIC MODE
When installing the safety lanyard cap on the
DESS post, an audible signal should be heard.
Refer to DESS (CARBURETED AND RFI EN-
GINES) for the summary of the coded signals
and possible causes. To gain access to the ECU
memory and fault codes, see ADVANCED DIAG-
NOSTIC below.
ADVANCED DIAGNOSTIC
There is two tools available that can be used to
gain access to the ECU memory and read the fault
codes.
VCK (Vehicle Communication Kit)
The VCK (Vehicle Communication Kit) (P/N 529
035 981) is the primary tool to diagnose fuel injec-
tion related problems.
B.U.D.S. is designed to allow sensor inspection,
diagnostic options and resettings such as the
Throttle Position Sensor (TPS) and the ignition
timing setting.
For more information pertaining to the use of the
software B.U.D.S., use its help which contains de-
tailed information on its functions.
WARNING
If the computer you are using is connected
to the 110 Vac power outlet, there is a poten-
tial risk of electrocution when working in con-
tact with water. Be careful not to touch water
while working with the VCK.
Electrical Connections
DESS Post Connection Through the
6-Pin Connector
Disconnect the connector shown in the following
picture and install RFI DESS adapter (P/N 278 001
978).
F12H18A
1
1. Connector to be disconnected
After all connections are done, connect the safety
lanyard to the DESS post to activate the commu-
nication.
IMPORTANT: When using the software B.U.D.S.,
ensure that the protocol matching the connection
used is properly selected in “MPI” under “Choose
protocol” as per the following chart.
TYPE OF
CONNECTION
ADAPTER
TO USE
PROTOCOL
TO CHOOSE
Through 6-pin
connector
RFI DESS adapter
(P/N 278 001 978)
DESS
MPEM Programmer
The MPEM programmer is the alternative tool to
diagnose fuel injection related problems.
The latest software designed for the RFI model
allows sensor inspection, diagnostic options and
sensor resetting such as the Throttle Position Sen-
sor (TPS).
NOTE: Make sure your MPEM programmer is up-
dated with the latest software version. For a com-
plete overview of the programmer, refer to the
MPEM Programmer Guide (P/N 219 700 090).
smr2004-Complete Line Up 303
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