hello my name is bob
you most likely have a problem with the ignition switch which contains the passlock sensor
it would be less troube to replace switch the relearn
you might get car to crank by by passing stater enable relay but might not injector pulse or spark to plugs
I need the car now. The only thing preventing me from getting it started is the passlock system. How do I disable the system?
part of class 2 communication
you won't have injector pulse or spark plugs to fire
have you tried clearing codes
No, how do I clear codes?
normally with scan tool but you can disconnect both cables at battery
then connect each cable to each other for 1 minute, without touching battery
this will drain capacitors in all modules and clear codes
if the fault is not current you may get it started
Yes, I have tried that, each time before attempting a relearn. but for only ten seconds.
if fault is current it won't start
you don't need to do a relearn unless you replaced a component
bcm,ecm or ignition swicth
I replaced the keylock cylinder.
it's the switch black part with electrical plug other end of igntion cylinder
is it inside the the switch housing? or internal?
you cant take it apart it is part of ignition switch
or external, i meant.
This bulletin is being revised to modify the Correction Information. Please discard Corporate Bulletin Number 04-08-45-005C (Section 08 – Body and Accessories).
Some customers may comment that their vehicle will not start. This comment is referred to as “no crank, no start with complete power.”
Additional customer comments may be as follows:
When the key is rotated from RUN to START there is a voltage signal sent to the BCM that goes through the PASSLOCK resistor in the ignition switch. This voltage signal may have an early ignition switch bounce (when going from RUN to START) that the BCM interprets as a failure in the PASSLOCK system and disables the starting circuit.
Using the chart below, verify that the ignition switch has been replaced at least once using P/N 10392423. After replacement of the ignition switch or replacement and reprogramming of the BCM, perform the 30-Minute Learn Procedure found in Programming Theft Deterrent System Components.
has the ignition switch failed if the car actually turns over and the rpm comes up to 2500 momentarily then the dies?
thays not normal rpms that high with foot of gas pedal
What I don't understand is why it worked fine until I changed the cylinder lock (the key was getting stuck) and now, after replacing the cylinder, I can't get it to work.
It may not be that high. It seems like a normal start to the point the RPM peaks and then dies.
sorry just stepped out to look at your history
when was last time you got it to crank
today, while trying a relearn.
so car actually cranks
yes. most times. there may have been a low batt issue a few times.
how long does it crank for
and is it only after relearn
it gets up to speed and dies. as i would imagine the passlock system does in normal conditions if the car is being stolen.
no. it does it during the relearn.
still sounds like switch, odd that it happened after cylinder but they all are very close to each other and maybe cylinder being jammed might have affected switch
alright. the cylinder was very hard to replace. does the cylider have to come back out, then the switch out of the housing?
no, back side of same housing cylinder goes in
lest side of column were as cylinder was right side
i meant left side
does the housing have to come off the steering column?
no take me 10 minutes
tight fit though need right tools
screws are torx bit
i think t-15 bit
so there is access on the back of the housing and i can remove and replace the ignition switch. any special tools?
ok, read my mind.
1/4 inch ratchet and torx bit
will a small ratchet fit in there?
you also have to rotate key to get switch to come of i think either accessory or run position the you can remove and install switch
1/4 inch ratchet
i usually turn screw a couple time with rachet then take the bit in my fingers to finish removal of screws
ok, well I have to order a part then. thanks for your help.
gm dealer like chevy have in stock very popular failure
rember to do relearn after
good luck and thanks
ok, good. i'll go look tomorrow. yeah, well i've got lots of experience on the relearn thing now.