Triumph Tiger Explorer XR 2017 Service Manual page 239

Tiger Explorer XR Series
Target dwell time
The actual time from coil 'on' to coil 'off'.
TDC
Top Dead Centre.
Throttle actuator motor
Motor used to open/close the throttle.
Throttle position
The position of the throttle butterfly given as a percentage of the movement range. When the data is displayed
on the tool, fully open need not be 100% nor fully closed 0%.
Throttle position sensor
Sensor for the primary throttle position.
Throttle Voltage
Voltage at the throttle potentiometer.
TPMS
Tyre Pressure Monitoring System.
Transponder
A transmitter-responder chip located in the ignition key. The transponder is activated by a radio signal sent out
by the immobiliser and TPMS control module, via an antenna located around the ignition switch. If the
immobiliser and TPMS control module does not receive the correct code signal from the transponder, the
immobiliser will remain active and the engine will not start.
Twist grip position sensor
The twist grip position sensor is used to relay twist grip position information to the ECM. The ECM uses this
information to drive the throttle actuator motor to the correct position.
Vbatt
Battery Voltage.
This model is fitted with an electronic engine management system which encompasses control of both ignition
and fuel delivery. The engine ECM is electronically paired to the chassis ECM to help prevent theft of the
motorcycle (see Immobiliser System). The engine ECM also draws information from sensors positioned around
the engine, cooling and air intake systems and precisely calculates ignition advance and fuelling requirements
for all engine speeds and loads.
In addition, the system has an on-board diagnostic function. This ensures that, should a malfunction occur in the
engine management system, the malfunction type, and engine data at the time the malfunction occurred, are
stored in the engine ECM memory. This stored data can then be recovered using a special service tool which is
mandatory for all Triumph dealers. In this way, precise diagnosis of a fault can be made and the fault quickly
rectified.
Intake air temperature sensor - situated in the top of the airbox. As the density of the air (and therefore the
amount of oxygen available to ignite the fuel) changes with temperature, an intake air temperature sensor is
fitted. Changes in air temperature (and therefore air density) are compensated for by adjusting the amount of
fuel injected to a level consistent with clean combustion and low emissions.
Ambient air pressure sensor - situated on the right hand side of the rear mudguard, beneath the seat. The
ambient air pressure sensor measures atmospheric air pressure. With this information, the amount of fuel per
FUEL SYSTEM / ENGINE MANAGEMENT
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