Triumph Daytona 955i, Service Manual

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T° 1 11 M [^ H
FUEL SYSTEM/ENGINE MANAGEMENT 9
Current Data
By using the Triumph diagnostic tool, live engine data
(engine running) can be recovered from the motorcycle.
The data available is:—
Function Examined Result Reported (Scale)
Calculated load
0-100%
Coolant temperature —40— +215°C
Idle fuel trim —100 — + 99.2%
Off idle fuel trim Not Used
Engine speed
0— 16,383 RPM
Air temperature —40 — +215°C
Ignition Advance
—64° — +63.5°
Throttle Position
0-100%
Lambda Fuel Trim *
—100 — + 99%
Fuel system status *
Open or closed loop
Oxygen sensor voltage *
0— 1.25 Volts.
Freeze—frame Data
Freeze frame data is stored at the time a DTC is recorded
(confirmed) by the ECM. If multiple DTCs are recorded,
the freeze-frame data which is stored will relate to the
first recorded DTC only.
By calling up freeze frame data associated with the first
recorded DTC, the technician can check the engine
condition at the time the fault occurred. The data
available is:—
Function Memorised Result Reported (Scale)
Calculated load 0-100%
Coolant temperature
—40— +215°C
Idle fuel trim —100 — + 99.2%
Off
idle fuel trim Not Used
Engine speed
0— 16,383 RPM
Air temperature —40 — +215°C
Ignition Advance —64° — +63.5°
Throttle Position 0-100%
Barometric pressure 0 — 983 mm/Hg
Lambda Fuel Trim *
—100 - + 99%
Fuel system status * Open or closed loop
Oxygen sensor voltage * 0 — 1.25 Volts.
These screen messages will not appear unless a
closed loop catalyst system is fitted and a closed
loop tune resident in the ECM.
Function Tests
The system allows the diagnostic tool to perform a series
of function tests on various actuators in the engine
management system. In some cases it is necessa
ry
to
make a visual observation of a component and in other, if
faults are present, DTCs will be logged.
The function tests available are:—
Function Examined Result Reported
Fuel pump test None (observation only)
Fuel pump priming
None (observation only)
Cooling fan None (observation only)
Instrument panel
Observation/DTCs
Purge valve DTCs
Idle Air Control Valve
Observation/DTCs
Checks/Adjustments
Adjustments
Using the Triumph diagnostic tool, it is possible to adjust
the value of two items which affect the idle speed and idle
emission settings of the system.
The tool allows adjustment of these items by making
small changes to certain parts of the ECM software.
The values that can be adjusted are
Se
tt
ing Adjusted Se
tt
ing Affected
Closed Throttle position
Voltage value of closed
throttle threshold
Idle fuelling (not
Idle emissions
applicable on closed loop
catalysts models)
Adaptive stepper position IACV start point
Long term fuel trim
Fuel mixture
(applicable on closed
loop catalysts models)
NOTE:
• In special circumstances, Triumph will make
available a password which can be keyed into
the tool which will allow download of a
completely new engine tune. This special
facility will be made available only when
necessary. For example, this may be necessary
if a motorcycle is transferred to a country or
area where legislation requires a different tune
to the original version installed at the factory.
9.21