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Triumph Scrambler 1200 XC - Service manual > Fuel Requirements

Exploded Views

Exploded View - Fuel Tank

Exploded View - Fuel Tank

Exploded View - Fuel Pump

Exploded View - Fuel Pump

Exploded View - Fuel Rail, Throttles and Injectors

Exploded View - Fuel Rail, Throttles and Injectors

Exploded View - Engine Management

Exploded View - Engine Management

Exploded View - Airbox

Exploded View - Airbox

Exploded View - Exhaust System

Exploded View - Exhaust System

Exploded View - Evaporative System (if fitted)

Exploded View - Evaporative System (if fitted)

Fuel Requirements - all countries except USA

This model must be run on 91 RON or higher unleaded fuel.


Ethanol is added to petrol in volumes up to 10% in Europe and up to 85% in other countries. Triumph motorcycles can use fuel containing ethanol up to 25%.

Fuel Requirements - USA

In the United States of America where the octane rating of fuel is measured in a different way, the following information may be applied: This model is designed to run on unleaded gasoline with a CLC or AKI octane rating (R+M)/2 of 87 or higher.


If 'Knocking' or 'Pinking' occurs at a steady engine speed under normal load, use a different brand of gasoline or a higher octane rating.


The use of leaded gasoline is illegal in some countries, states or territories and will invalidate the vehicle and emissions control warranties. Additionally, leaded gasoline will cause damage to emissions control components.

Oxygenated Gasoline

To help in meeting clean air standards, some areas of the U.S. use oxygenated gasoline to help reduce harmful emissions. This model will give best performance when using unleaded gasoline. However, the following should be used as a guide to the use of oxygenated fuels.


Because of the generally higher volatility of oxygenated fuels, starting, engine response and fuel consumption may be adversely affected by their use. Should any of these difficulties be experienced, run the motorcycle on normal unleaded gasoline.


Ethanol fuel is a mixture of 10% ethanol and 90% gasoline and is often described under the names 'gasohol', 'ethanol enhanced', or 'contains ethanol'. This fuel may be used in Triumph motorcycles.



Fuels containing methanol should not be used in Triumph motorcycles as damage to components in the fuel system can be caused by contact with methanol.

MTBE (Methyl Tertiary Butyl Ether)

The use of gasolines containing up to 15% MTBE (Methyl Tertiary Butyl Ether) is permitted in Triumph motorcycles.

Glossary of Terms

The following terms and abbreviations will be found in this section. Below is given a brief explanation of what some of the more common terms and abbreviations mean.


After Bottom Dead Centre.

Air temperature

The air temperature in the airbox and intake hose.

Air temperature sensor

Sensor located in the airbox to detect the temperature of the incoming air.

Ambient air pressure

Pressure of the air in the airbox.


After Top Dead Centre.


Before Bottom Dead Centre.


Before Top Dead Centre (TDC).

Battery Voltage

The voltage at the input to the Engine Electronic Control Module (ECM).

Catalytic conv erter

Device placed in the exhaust system which converts toxic gases and pollutants in exhaust gas into less-toxic pollutants by an oxidation and a reduction reaction.

Closed throttle position

Throttle position at idle, measured as a voltage and expressed as percentage.

Coolant temperature

The coolant temperature in the cylinder head.

Coolant temperature sensor

Sensor which detects coolant temperature.

Cooling fan status

The ON or OFF condition of the cooling fan.

Cruise control cancel sw itch (if fitted)

A switch located in the twist grip housing, used to cancel the cruise control. The switch is operated by the over-closing of the twist grip.


Diagnostic Trouble Code.

Electronic steering lock (if fitted)

The electronic steering lock operated by a switch.

EMS main relay

Engine Management System Main Relay. When the ignition is switched on, the EMS main relay is powered up to provide a stable Voltage supply for the engine ECM.

Engine ECM

Engine Electronic Control Module.

Engine speed

The crankshaft revolutions per minute

Fall detection (if fitted)

The fall detection switch will detect if the motorcycle is on its side and will cut power to the engine ECM immediately.

If the fall detection switch is fitted, the inertial measurement unit (IMU) will not be fitted.


A data set captured at the time a Diagnostic Trouble Code (DTC) is set.

Gear position sensor

Gearbox mounted sensor which delivers information to the engine ECM. This is converted to the gear position value that is displayed on the instrument's gear position indicator and/or neutral lamp.

Idle fuel trim

The percentage above or below the nominal fuel requirement for the volume of air entering at idle.

Idle fueling

Adjustment of fueling at idle to suit the actual air inducted.

Idle reference speed

The target idle speed as determined by the engine Electronic Control Module (ECM).

(It should be the same as the actual idle speed if the motorcycle is operating correctly).

Ignition adv ance

The timing of ignition at the spark plug relative to Top Dead Centre.

Ignition sw itch position

The ON or OFF position of either or both the ignition switch and the engine stop switch.

Ignition timing

Same as ignition advance.

Immobiliser and Tyre Pressure Monitoring System (TPMS) Control Module

The control module for the immobiliser and TPMS system.

IMU (if fitted)

The Inertial Measurement Unit measures the following:

From these measurements the IMU calculates the motorcycle's lean angle.

The IMU outputs are used for multiple systems, for example, optimised cornering ABS (OCABS) and fall detection.

If the IMU is fitted, the fall detection switch will not be fitted.

Inj ector pulse time

The time during which an injector remains open (i.e. delivering fuel).

Keyless ECM (if fitted)

Keyless Electronic Control Module.

Long term fuel trim

Fueling after adapting to the engine's long term fueling requirements (closed loop only). See also short term fuel trim.

MAP sensor

Manifold Absolute Pressure (the air pressure in the intake system).


Malfunction Indicator Lamp.

Illuminates when most Diagnostic Trouble Codes (DTCs) are set.

Neutral sw itch status

The NEUTRAL or IN GEAR status of the transmission.

Off idle fuel trim

The percentage above or below the nominal fuel requirement for the volume of air entering at engine speeds other than idle. This function is not currently used in the Triumph system.

Open circuit

A break in an electrical circuit - current cannot flow.

Ov er temperature

High temperature within the engine Electronic Control Module (ECM) caused by an internal or external failure.

Oxygen sensor

The oxygen sensor measures the oxygen levels in the exhaust gases and feeds this information to the engine ECM. Based on this information, adjustments to air/fuel ratio are made.

Primary throttle position sensor

Sensor for the primary (lower) throttle position.

Purge v alv e duty cycle (if fitted)

The time the purge valve is open in an open/close cycle, expressed as a percentage of the cycle time.

Road speed sensor

The rear wheel speed sensor is used to supply road speed data to the engine ECM.

Secondary air inj ection (if fitted)

A small amount of air injected into the exhaust port to reduce the levels of pollutants in the exhaust gases.

Sensor supply Voltage

Supply voltage to the system sensors (nominally 5 volts).

Short circuit

A short cut in an electrical circuit - current bypasses the intended circuit (usually to ground)

Short term fuel trim

A correction applied to the fuel mixture during closed loop operation. This, in turn, has an effect on the long term fuel trim in that if an engine constantly requires mixture correction, the long term fuel trim will adapt to this requirement thus reducing the need for constant short term adjustment.

Side stand status

The 'up' or 'down' position of the side stand.

Target dw ell time

The actual time from coil ON to coil OFF.


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 diagnostic software, fully open need not be 100% nor fully closed 0%.

Throttle Voltage

Voltage at the throttle potentiometer.

TPMS (if fitted)

Tyre Pressure Monitoring System.

Tw ist grip position sensor

The twist grip position sensor is used to relay twist grip position information to the engine ECM. The engine ECM uses this information to drive the throttle actuation motor to the correct position.


A transponder-responder chip located in the ignition key. The transponder is activated by a radio signal sent out by the immobiliser control module, via an antenna located around the ignition switch. If the immobiliser control module does not receive the correct code signal from the transponder, the immobiliser will remain active and the engine will not start.

See also:

 Triumph Scrambler 1200 XC - Service manual > Engine Management

 Triumph Scrambler 1200 XC - Service manual > Engine Management System

System Description This model is fitted with an electronic engine management system which encompasses control of both ignition and fuel delivery. The engine electronic control module (ECM) draws information from sensors positioned around the engine, cooling and air intake systems and precisely calculates ignition advance and fueling requirements for all engine speeds and loads.

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