Honda AFRICA TWIN XRV750 (1987-2002) [156/291] Ignition system 5 7
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Honda AFRICA TWIN XRV750 (1987-2002) [156/291] Ignition system 5 7

Honda AFRICA TWIN XRV750 (1987-2002) [156/291] Ignition system 5 7

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Ignition system 5 7 3 Connect the probes of an ohmmeter between the green black and yellow black terminals on the sensor and measure the resistance Compare the reading to the value specified at the beginning of the Chapter 4 Now connect the probes between the yellow black and red yellow terminals on the sensor Slowly open the throttle from fully closed to fully open and back to fully closed Check that the resistance Increases as the throttle is opened and decreases as it is closed 5 To check the input voltage to the sensor connect the positive lead of a voltmeter to the green black wire terminal on the connector and the negative lead to the yellow black wire terminal Turn the ignition switch ON and check that a voltage of 4 7 to 5 3 volts is present If it isn t there is a fault in the wiring or the ignition control unit 6 If the throttle position sensor functions correctly then the fault must be in the wiring harness or the ignition control unit ICU Check the wiring between the TPS connector and the ICU connector for continuity and check the connectors themselves for loose or broken terminals If the wiring is good the ICU could be faulty see Section 5 Replacement Note The sensor is not available separately from the carburettor bodies on XL600 and 650 models and is only available as a unit with its mounting bracket on XRV750 models Do not disturb it unnecessarily 7 Remove the carburettors see Chapter 4 The throttle sensor is mounted on the right hand end of the carburettor assembly see illustration 8 Undo the three screws which retain the sensor mounting bracket to the carburettor body do not disturb the screws which secure the sensor to its bracket 9 Install the sensor locating the tab on the throttle shaft in the cutouts on the inside of the sensor and tighten the screws securely 8 Immobiliser system HISS XL650V models the signal stored in the ICU memory the immobiliser indicator light in the tachometer marked by a key symbol comes on for two seconds then goes out and the ICU allows the engine to be started If the key code signal is not recognised or if there is a fault in the system the indicator light stays on If the light stays on refer to the fault diagnosis and troubleshooting Sections below Likewise if the light does not come on at all 3 The ICU can store the codes for up to four registered keys They keys should be kept separately i e not on the same key ring as the proximity of another key to the one being used in the switch can lead to the signal from it being jammed and the bike will not start The key has a built in transponder which can be damaged if the key is dropped or knocked gets too hot is too close to a magnetic object or is submerged in water for too long If all the keys are lost the ICU must be replaced with a new one so always make sure you have at least one spare key If a new key is obtained it must be registered into the system before the bike can be started Key registration procedure To register a new key Note To do this you will need the Honda special tools Part Nos 07XMZ MBW0100 07YMZ MCB0100 or 07XMZ MBW0101 and 07YMZ 0010100 which are a wiring loom and adapter that plug into the ignition pulse generator wiring connector If this tool is not available registration must be carried at a Honda dealer with the special tool 4 Obtain a new key from a Honda dealer then have it cut to match the original key 5 Remove the fuel tank see Chapter 4 then disconnect the 2 pin ignition pulse generator wiring connector Connect the special tool wiring connector to the ICU side of the connector then connect the red coloured clip of the tool to the battery positive ve terminal and the green coloured clip to the battery negative ve terminal 6 Turn the ignition switch ON using your original key The immobiliser indicator light should come on and stay on if it starts to flash after ten seconds then there is a fault in the system which will have gone into fault diagnosis mode and the pattern of the General information 1 Honda s HISS Honda Ignition Security System immobiliser is fitted to XL650V models as an anti theft device The system will only allow the machine to be started if the correct registered key is used to turn the ignition ON The system consists of a transponder which is part of the ignition key a receiver which is fitted around the ignition switch and the ignition control unit ICU 2 When the Ignition is switched ON the ICU sends power through the receiver to the transponder The transponder sends a coded signal back through the receiver to the ICU If the signal sent by the transponder matches 7 7 Throttle position sensor arrowed flashes it emits should be matched with the fault code see below Now disconnect the red clip from the battery positive terminal and leave it disconnected for at least two seconds then reconnect it The indicator should now come on for two seconds then begin to flash repeatedly four times This indicates that the system is in registration mode At this point the registrations of all keys except the one in the switch will have been cancelled so if you have another spare apart from the new one you want to register this will also have to registered 7 Turn the ignition OFF and remove the original key placing it well away from the receiver 8 Insert the new key into the switch and turn it ON The indicator should now come on for two seconds then begin to flash repeatedly four times This indicates that the system has registered the new key Turn the ignition OFF and remove the key 9 To register any other spare keys that will have been cancelled repeat Steps 7 and 8 Up to four keys can be registered 10 On completion turn the ignition OFF then remove the special tool and reconnect the ignition pulse generator wiring connector Now turn the ignition ON using any of the registered keys to return the system to normal mode 11 Check that all registered keys can start the motorcycle To register new keys with a new ignition switch Note To do this you will need the Honda special tool Part No 07XMZ MBW0100 which is a wiring loom adapter that plugs into the ignition pulse generator wiring connector If this tool is not available registration must be carried at a Honda dealer with the special tool 12 Obtain a new switch and two or more if you want new keys which I presume come with the switch 13 Remove the faulty switch see Chapter 9 but retain the receiver to fit with the new switch 14 Remove the fuel tank see Chapter 4 then disconnect the 2 pin ignition pulse generator wiring connector Connect the special tool wiring connector to the ICU side of the connector then connect the red coloured clip of the tool to the battery positive terminal and the green coloured clip to the battery negative terminal 15 Place one of the original registered keys for the faulty switch next to the receiver 16 Connect the new ignition switch to its connector in the wiring loom but keep it away from the receiver Turn the new switch ON with one of the new keys The immobiliser Indicator light should come on and stay on which means the ICU recognises the old key that is next to the receiver if it starts to flash after ten seconds then there is a fault in the system which will have gone into fault diagnosis mode and the pattern of the

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