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Jay
Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 18708
Experience:  20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
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2012 Nissan altima push start won't work

Customer Question

2012 Nissan altima push start won't work
Submitted: 11 months ago.
Category: Nissan
Expert:  Jay replied 11 months ago.

Hello my name is ***** ***** thank you for your question

Does the ignition come on at all? Does the head lights work?

Customer: replied 11 months ago.
it does car was brought to a friend who used a jumper wire to start the car . so yes
Expert:  Jay replied 11 months ago.

Yes, the ignition comes on? meaning if you press the start button once, it goes to ACC, and if you press it again it turns ON where all the dash warning lights come on?

Expert:  Jay replied 11 months ago.

What do you mean he used a Jumper wire to start the car?

Does the ignition not go to the ACC position? does it go right to ON?

Customer: replied 11 months ago.
1. He bypassed the button and has a wire going to the battery so they could start the car.
2. You push the button it goes to acc, push it again it goes to on.
Expert:  Jay replied 11 months ago.

He ran direct power to the push button to start the car?

Were all fuses checked with a test light?

Customer: replied 11 months ago.
No I think it was to the starter
Customer: replied 11 months ago.
From the starter to the battery
Expert:  Jay replied 11 months ago.

Do you know if you have remote start in the car?

Expert:  Jay replied 11 months ago.

Do you know if the brake lights work?

Customer: replied 11 months ago.
Its not remote start and yes brake lights work but one bulb is out
Expert:  Jay replied 11 months ago.

You do have remote start?

Customer: replied 11 months ago.
No it doesnt
Expert:  Jay replied 11 months ago.

is this a coupe or sedan?

Are you able to do some checks?

Customer: replied 11 months ago.
Sedan , I'm not at the car right now but you can tell me the checks and I will get back to you
Expert:  Jay replied 11 months ago.

I have a couple idea's on what to check to see if we can isolate the issue. Part of this may require a scanner. But if you can do a couple checks and you have a volt meter, I am sure we can isolate the issue.

How handy are you? Other wise, I can give you some of my thoughts on what needs to be checked so you can have it done.

Let me know..

Expert:  Jay replied 11 months ago.

There is a plug on the top of the transmission for the transmission Range switch. This is what detects if the car is in Park or Neutral. If the car can not see if it's in Park or Neutral, it won't start. So I would check that. If that looks good, then I would ohm the wires from the Park/Neutral switch to the IPDM. The two wires go to Pins 74 and 72 on the IPDM. If that all checks out. Then I would check to see if the BCM is grounding pin 46 at the IPDM. These are signals that will allow the starter to engage. We know the starter is good cause it was jumped and it started the car. So we need to look at these signals. If both of these signals are good, then the IPDM is your problem and that control unit would need to be replaced.

Hang on a min while I get you the wiring diagram and IPDM pin layout so you can check this..

Expert:  Jay replied 11 months ago.

oh.. 1 last thing. There are two fuses in the IPDM as well. Make sure you check them also. Click this link below to download the wiring diagram so you can perform the proper checks to isolate your issue.

https://dl.dropboxusercontent.com/u/105565483/2.pdf

Expert:  Jay replied 11 months ago.

If you have any more questions on this, please feel free to ask.

If not, and you're satisfied with my help, please Rate me. That is how I get credit for my work.

I hope I have provided you with Excellent Service.

Thanks Jay!

Customer: replied 11 months ago.
OK I will be at the car in a few hours to do the tests , I will get back to you
Expert:  Jay replied 11 months ago.

You got it. With the information I provided, you should be able to isolate your issue, so let me know how you make out.

Thanks Jay!

Customer: replied 11 months ago.
How would I test the transmission range switch?
And the wires to the ipdm just check for continuity?
Expert:  Jay replied 11 months ago.

The switch it's self should have continuity if in park or neutral. So pin 74 should have power to the switch which comes from fuse 33 in the IPDM. If the switch is good and you are in park or neutral then power should come back out of the switch and back to pin 72 in the IPDM. Checking at the IPDM is much easier than checking the switch.

Customer: replied 11 months ago.
The range switch and park/neutral switch are two different switches?
Expert:  Jay replied 11 months ago.

yes, I am thinking the Park/Neutral.. but it's actually the Range switch. The Park Neutral is a external switch, but the Range switch is internal of the transmission. So if that is bad, the TCM would need to be replaced.

Expert:  Jay replied 11 months ago.

I mean the Transmission. I think this has a external TCM on this year

Expert:  Jay replied 11 months ago.

I am no longer in front of my computer. Working off memory now..

Customer: replied 10 months ago.
OK there is power through both pins , how do u check if its grounding pin 46 with a test light?
Customer: replied 10 months ago.
It is not Grounding but when I put ground to it it still doesn't start
Expert:  Jay replied 10 months ago.

You don't want to use a test light, you can burn out a control unit. You need a volt meter

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