It sounds to me like that second fob is not associated with a valid key - remove both keys from the fobs, leave the fobs in the house and make sure the car starts with both keys, and then try to reprogram the fobs to the car, the procedure should be in your owners manual.

 

Hi checked the manual and nothing in there regarding the procedure to reprogram the fobs??? How do you do it?

 

He says he can start the car with the key, which suggests the issue is with the fob, the fob locks & unlocks the car, which suggests the issue is the fob/key pairing, and that is dealt with by using that key when programming the fob to the car, the procedure for which, as far as I know, will be found in the owner's manual.

 

Its not in the manual for my swift, its a scan tool job on the 2006 up to 2010 models in this part of the world. Hopefully his is different and allows it, but i suspect not.

 

What type of keyless start does the vehicle have? Pushbutton or the style where the fob unlocks the steering lock and you use a knob (instead of the key) to turn the ignition switch and start the car?

 

It's not the push button. It's a fob and use knob to start car.

 

This style of fob?

Do you, by any chance, know the history of the vehicle - is it a used JDM import?
Does the owner's manual that you have show the fob that you have?

The instructions below are taken from te owner's manual for a 2007 Grand Vitara which uses the key fob I'm showing above.

 

Hi thanks for that. Yes what you posted is my keys for the cars. Definitely looked in the manual but couldn't find anything regarding what was taken from the Vitara manual.

OK so in basic terms I use that procedure and that may get it working properly?

 

I suspect he has the integrated button and key type, which is not user programmable

 

When I hear integrated button & key type this comes to mind...

This is keyless entry, not keyless start - you can unlock the car without inserting the key, but you MUST use the key to start the car.

He says he has a knob style keyless start

It's not the push button. It's a fob and use knob to start car.

The fob image I posted earlier is a knob style keyless start - you push a button on the door to unlock the car, get in, turn the knob on the ignition switch and the car starts, the key stays in your pocket - if the fob battery dies you use the key to unlock the door, insert the key through the knob into the ignition switch and use it to start the car.

As I understand it, the problem he is describing is that he can lock & unlock the car with the fob but has to use the key to start the car - the BCM recognizes the fob and unlocks the car, the immobilizer recognizes the key and allows the car to start, but the immobilizer does not recognize the fob so the key MUST be used to start the car. One key/fob pair works, suggesting the vehicle side of things is functional, the second key/fob pair does not, and that suggests a mismatch between the two.

The knob style keyless start fob I posted earlier IS user programmable (at least on the vehicles I have seen it used with)

 

I would go ahead & try it - please note - you need to program or re-program all the fobs at the same time.

Best case scenario is both keys work when you're done, worst case scenario the programming method doesn't work for your car, and you end up exactly where you are - the median is the programming method works, one fob is defective and does not program, the other fob (the working one) should re-program.

I'm curious - your owner's manual should document, at least how the fobs function, even if they don't have programming details - does your manual show that style fob?

 

swifts use a different security module and i think you will find its going to need a pretty good scan tool to do it.