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Matt, Engineer
Category: Car
Satisfied Customers: 20396
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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Suzuki Grand Vitara: I have a 2007 Grand Vitara and when I

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I have a 2007 Grand Vitara and when I try to start nothing happen. With either the key or the remote it acts like there is no battery power. No obvious fuse problems.


If the car's not cranking then first check it can turned over by hand so double checking for any mechanical issues

If OK then check that the main battery cables are on tight and the terminals are clean and bright. Do the same for the engine / gearbox earth strap.
Then follow the main positive lead back to the engine and down to the starter motor, and check the connection at this end as well.

There should also be a small wire to the motor which should have 12V when you're turning the ignition switch to crank. If the 12V isn't there, check back along this wire for damage to the insulation or corroded connections

This 12V feed comes directly from the ignition switch so this may be faulty and need replacing

Check the resistance of the main positive lead that runs down to the motor as anything more than a few ohms and it should be replaced

Don't forget to try a jump start from another car / battery as its possible the battery is poor, if you have a voltmeter a healthy battery should read 12.7+V

also try substituting the battery for another as I've known a very flat battery to drag down the system voltage too far even with jump cables

one other thing to consider is that the immobiliser is faulty and preventing the starter from being enabled - however if the dash / ignition lights are on then this usually means that its off

If this is all OK then its possible the car needs a new starter motor

Customer: replied 3 years ago.
What is the immobilizer? I apologize for not making clear that there is nothing live on the dash. There is no response to the remote and all electrical indicators are off. Had already performed all checks you mentioned with no problem discovered. Will the immobilizer stop all electrical indications? How do I check it?

Thanks in advance,

Hello Bob

immobilser = security system

if you don't have any dash lights coming on and it won't crank then its likely to be the security system is active

I'd suggest trying resetting the ECU by disconnecting the battery cables and clamping them together for 10 mins. Remove both battery leads from the battery then use a nut and bolt or G-clamp to hold both battery lead terminals together.

This discharges any capacitors / memory within the ECU and around the car so ensures all memory settings are wiped clear - back to the factory default.

This will reset all the systems on the car and you may need the radio security code to get it going again, and ensure that the keys are in your hand when you re-connect the battery as the car may lock and turn on the alarm

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