Question about 2005 Suzuki Boulevard C90

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Ignition switch doesn't start bike

I have a '05 C90 Boulevard and began to have a few intermitent problems with the ignition switch not functioning. The battery was checked good by a battery specialty shop. I also hooked up a car battery in line with the battery on the bike to remove all doubt that it was a bad battery. All lights come on, horn sounds, etc, but nothing on the ignition. If I hold down the ignition and flip my kill switch from off to on, it does actually try to crank over for a second but then goes silent. Took it to my local Suzuki dealer and they claim to have tested all circuits with no issues and are now telling me that my "ECO" may be the problem which is a $1,000 part! Please help!

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The ECU will not cause this symptom. They are giving you a line.
The link between the starter switch and the battery and the starter motor is pure electro-mechanical. The ECU covers how the engine works, electrically, things like timing, etc. not the starter motor.
The fact the bike starts to crank then stops says that there is at least a rudimentary path between the battery and the starter.
Just by the starter there will be a solenoid that controls the starter. It has a couple of screwed-down cables - those are the main power cables that feed the starter. You can bypass the solenoid by directly connecting those two cables - this will fore the starter to rotate, regardless of what any ECU says. I would perform that as a check but be careful - there is a lot of power going through it. Be careful not to touch the two terminals via the threaded portion of the screws that hold down the cables - only touch the bolts or you may weld a notch in the threads - it will make it difficult to remove if it is faulty.
I would normally use a single jump lead - connect one end to the nut holding down one lead, then momentarily touch the other nut - if the battery is good it WILL turn over. This is making the most basic of connections in the ignition system - connecting a battery to a motor - it can't fail if all is good and will certainly give you an indication of whether or not the battery is up to the task.
I would seriously reconsider your choices in mechanics, though. This is a basic test they should have performed.

Posted on Jul 01, 2009

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What to look for my m90 boulevard wont crank over - had service done 6mths - just replaced with brand new battery - but bike wont crank over


Hi, Anonymous and the usual suspects are:
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2. Engine Run Switch in the "OFF" position.
3. Discharged battery, needs to be 12.5 volts or better and be able to pass a load test if necessary.
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I have a 2005 c90. It currently has 3900 KM. Every once in a while it decides not to start like its jammed on compression. It always starts at home but occasionally decides not to start after being.


Hi, Kevin and the usual suspects are:
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4. Check the battery terminals for damage or corrosion check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
5. Tip over sensor needs a reset.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand or clutch pull in switch/sensor.
9. Starter control circuit, relay, or solenoid faulty.
10. Main fuse or circuit breaker may be blown or faulty.
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1 Answer

Suziki Boulevard C90 wont start, when hitting the ignition nothing happens, no power, no light, nothing are on, it's never put the ignition on.


ASSUMMING THE BIKE IS 12 VOLTS WITH A NEGATIVE GROUND;
1. with a voltmeter check across the battery terminals and see that it has about 12-12.6 volts. If it does not then charge or replace the battery first.
2. Check the fuses; most bikes have a main fuse coming off of the battery or in the fuse box.
3. If the battery and fuses appears ok, check for loose or corroded terminals. Also look for connectors and wires that are corroded and/or have a melted look.
4. If everything before this checks out ok, check for 12 power at the back of the ignition switch.
5. At this point it is best that you have a wiring diagram to determine which wires carry power away from the ignition switch. Turn the ignition switch on and continue to track the power wires to where ever they go. When the ignition switch is turned on it should have some wires measuring 12 volts coming off of the switch or the switch is bad. Continue to track wires until they reach there source or a point that no longer has 12 volts and that will be the problem area.

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1 Answer

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Might be a faulty side stand lockout switch. They're subject to a lot of wear, tear and grime and tend to wear out. So your bike thinks the side stand is down when it isn't locking your bike out so it won't start. Failing that it may be a faulty neutral switch, again the bike doesn't know it is in neutral so doesn't start.
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Check your battery cables, especially the ground cable. Check your ignition switch for loose wires/connections. Check your fuse box. Check your wiring harness for shorts and broken wires. When you say "battery seems to have plenty of power" what does that mean? What test(s) did you perform on it?

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