No push to start led illumination no accessory power no start
In need of a direction to tackle this no power and unable to scan for fault codes. I have read Alldata's theory of operation on the push to start system but i am unable to come up with a place to start my diagnosis. The fob battery is good and does unlock the doors as i approach the vehicle. The issue I believe is with the push to start.
John, So, you can't get the system to go into KOEO ? (Typically a double tap on start button or long push)?
Occasionally the immobilizer will need resynced. You should be able to communicate with the immobilizer or smart key (whichever your scan tool calls it) under misc/special functions. Look for codes but also try whatever function sounds like resync smart to steering lock or whatever else they have. You do not need to login with a LSID. This is a basic function of Techstream and most better scan…
I thought with no ignition power I would have zero communication with all modules but now I will give it a try in the am thanks.
Has somebody removed the dash for hvac work or other reason?
Not to my knowledge no. My original understanding was the ID box was what I needed to chase down and it was located near the push to start button. It's not there is it. It now looks like it's in a real tough spot.
Make sure the fuse for the I'd box is not blown.
Is there a key symbol lighting up on dash as you push button letting you know immobilizer does not see key? Did you check all fuses related to ignition? If locks are unlocking as you approach and touch door handle switch, (not pressing unlock on fob-thats 2 different functions), you should be able to communicate with some modules I would think-especially bcm, to give some direction or codes. You…
Did not no because nothing will power up I guess I can physically remove fuses and check for bad fuses.
No key symbol no. I will start with ignition fuses and check for communication thanks.
Can you get wireing digram, lIke other posted are you getting power to button ? Can you jump the starter and will it crank ? Then has dash been messed with ?
Looking through symptom troubleshooting for the Smart Access system and I came across this: HINT: To allow use of the Techstream to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the Techstream and the power management control ECU. (Opening and closing a door can…
Will definatelly give that a try in the am thanks.
Had one a few weeks ago similar issue steeringlock wasn’t working had same symptom as yours steering column lock was stuck took a hammer and tap on it and steering unlock and everything came on and car started
Tomorrow is another day thanks for the input.
John, I have had a couple similar scenarios with different cars. Everything seems dead and no communication with any module. First thing I would test is the Fuse for the "ID code box". This box receives and checks the Key ID. This is the first step in the chain of immo. If this module is offline, absolutely nothing will happen.
I'd code box I'll start there thank you.
Not sure how to send this to the group I can send it to you. The immobilizer has no pins in it. The 5 pin connector plugs into an empty small plastic box. Also no b+ on the black wire. Any of this make any sense?
It should be an 8-pin connector so I'm not sure if you have the right one. Give justin Miller's suggestion a try before going to deep.
Use the prox key to push the push button start switch.
Just something to try, hold key close to button, then push on. Might be weak signal from key.
No luck with that on this one and the brake switch is ok.
Have you tried to scan it yet???
Connected up our autell maxysys and it would not identify or scan the vehicle.
My autel maxisys will not identify or scan the vehicle no.
Were you ever able to check fuses? Fuse AM2 under the hood looks to be an important power feed for the power management ECU. That's what ultimately controls the lights on the switch and is also what we were hoping to communicate with by pushing the door switch a whole bunch of times while trying to communicate with the vehicle.
Try manually inputting the vehicle type, and turning on the 4-way flashers then doing "full scan" ?
Three things you have to look at on this. Is electronic Steering lock, id box(smart Ecu certification) or ECM.
Spent most of the day looking for the keyless start antenna only to find out later in the day it was not where I originally thought it was. I believed it to be close to the keyless ignition button but finding out later I needed to remove the HVAC housing assembly.
I'll see what I can come up with thanks.
SImple, but often overlooked, is to check the 12v first. Make sure its good and charged or the dash may remain blank.
Yes I agree battery is very important and it is in good shape here. I could not make much progress last week on our Lexus with no power issue customer decided to pick it up on Friday thanks all who responded with help. If this is not how you close a help request would someone let me know.