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Finally a cheap passlock fix!
CF Beginner
Joined: Sep 2010
Posts: 1
Likes: 0
I need some detailed instructions on getting to these contacts, I have not done this before...and would love some assistance. My email is joshbaby03@yahoo.com, or you could just post some info on the thread for everyone...thanks alot.
Josh
Josh
CF Beginner
Joined: Sep 2010
Posts: 6
Likes: 1
send me the diagram...would appreciate it...my 2001 SS will not turn over.security light battery light and service soon light continue to flash..nonstop...the 3 pins going into my ign switch appear to be ok....need to know EXACTLY where these 3 wires are at you are refering to and which ones to solder.thanks bat
CF Beginner
Joined: Sep 2010
Posts: 6
Likes: 1
hey great info!!!need to know where this cover is EXACTLY>>>Are you refering to the round cover which the key fits thru...appears to have 3 clips holding it on...is this the cover you are refering to which the contacts are behind??I have pulled the switch and it has a black nodule on top of it and a 3 pin attachment on the rear of this cylinder...If this cover you are refering to is not this round cover then EXACTLT where is the cover you are refering to??I also see a metal cover strip which appears to have the springs in it the key slids over when inserted....a picture or diagram would be apprecuated so I can locate these contact points you have refered to. thanks bat
CF Beginner
Joined: Sep 2010
Posts: 6
Likes: 1
ok first off changing the ignition switch and tumblers will do absolutely nothing sorry if you have already done this. there are three main components to the passlock II system the passlock sensor, the BCM, and the Ecm and of course the wiring in between. Odds are if this keeps happening and there is no other problems such as door locks freaking out trunk release just goin off then it's not the bcm if you do the relearn feature and it works the it is also not the Ecm. so you are left with the 3 wires that run from the bcm to the passlock sensor.odds are the passlock sensor is bad. now there are two solutions either go to the dealer and have the sensor replaced or bypass the system for good. any respectable mobile electonics installer should be able to do this no problem it takes me about 20 mins and i personally charge 40 dollars to do so hope this helps also if you are mechanically inclined in electronics i can send a diagram on how to bypass it yourself hope this all helps
CF Beginner
Joined: Sep 2010
Posts: 6
Likes: 1
follow up on my previous msg to you...sorry but I got my wires crossed...you are refering to the ignition switch which the ignition key cylinder housing fits in to...correct?????This ignitioon switch has the contacts on the rear....so would appreciate info on the best way to remove this ignition switch housing....can I get it out from underneath or do i have to remove complete dash??thanks bat
CF Beginner
Joined: Sep 2010
Posts: 6
Likes: 1
ok first off changing the ignition switch and tumblers will do absolutely nothing sorry if you have already done this. there are three main components to the passlock II system the passlock sensor, the BCM, and the Ecm and of course the wiring in between. Odds are if this keeps happening and there is no other problems such as door locks freaking out trunk release just goin off then it's not the bcm if you do the relearn feature and it works the it is also not the Ecm. so you are left with the 3 wires that run from the bcm to the passlock sensor.odds are the passlock sensor is bad. now there are two solutions either go to the dealer and have the sensor replaced or bypass the system for good. any respectable mobile electonics installer should be able to do this no problem it takes me about 20 mins and i personally charge 40 dollars to do so hope this helps also if you are mechanically inclined in electronics i can send a diagram on how to bypass it yourself hope this all helps
CF Beginner
Joined: Sep 2010
Posts: 6
Likes: 1
ok first off changing the ignition switch and tumblers will do absolutely nothing sorry if you have already done this. there are three main components to the passlock II system the passlock sensor, the BCM, and the Ecm and of course the wiring in between. Odds are if this keeps happening and there is no other problems such as door locks freaking out trunk release just goin off then it's not the bcm if you do the relearn feature and it works the it is also not the Ecm. so you are left with the 3 wires that run from the bcm to the passlock sensor.odds are the passlock sensor is bad. now there are two solutions either go to the dealer and have the sensor replaced or bypass the system for good. any respectable mobile electonics installer should be able to do this no problem it takes me about 20 mins and i personally charge 40 dollars to do so hope this helps also if you are mechanically inclined in electronics i can send a diagram on how to bypass it yourself hope this all helps
CF Beginner
Joined: Sep 2010
Posts: 1
Likes: 0
Can you send me instructions on how to fix the passlock problem?
Hi Jondoe28
Can you send me instructions (with diagram preferrably) on how to fix the passlock problem? Thank you.
dcngo
dcngo@yahoo.com
Can you send me instructions (with diagram preferrably) on how to fix the passlock problem? Thank you.
dcngo
dcngo@yahoo.com
Had this done a couple of weeks ago. Hasn't acted up once, security hasn't come on at
all either. Hired our tractor mechanic to do it. Said 2 contacts were burnt on key switch.
Used sand paper to clean them, and good to go. Cut and pasted from another site:
I just fixed my 2002 impala security light issue. It cost me 2 hours, no money. Here is how the system works. The passlock sensor and the ignition switch are in series. When you turn your key you generate a low current read by the body control module. If the current generated is out of range the BCM won't recognize the signal and your car won't start for 10 min. There could be different reasons why the signal is out of range. On most of the cases the ignition switch contacts are burned out, and this will cause a voltage drop on the contact so the signal getting to the BCM is going to be lower than usual so it will be out of range. Take your ignition switch out (if you don't know how send me your e-mail (believe me I'm not looking for e-mail addresses I just need to scan the instructions, since I have them only printed out) and I'll send you detailed instructions for free. Once the switch is out remove the cover on the back of the switch (it is clipped on, all you need is a flat head screwdriver). Once the cover is removed you should see 5 fairly big electric contacts. I bet at least one or two are burned out. Clean them with fine sand paper until their surface is clean and flat and make sure the steel springs pressing the contacts together are tight and are pushing the contacts firmly. If not, using pliers bend them to get good contacts. Reinstall the switch and your car should start every time. If the contacts are really bad you might have to change the ignition switch.
I know dealers want to change every part on the car so please do not let them change the passlock sensor. The passlock sensor is a hall sensor and there is no reason for the sensor to go bad.
all either. Hired our tractor mechanic to do it. Said 2 contacts were burnt on key switch.
Used sand paper to clean them, and good to go. Cut and pasted from another site:
I just fixed my 2002 impala security light issue. It cost me 2 hours, no money. Here is how the system works. The passlock sensor and the ignition switch are in series. When you turn your key you generate a low current read by the body control module. If the current generated is out of range the BCM won't recognize the signal and your car won't start for 10 min. There could be different reasons why the signal is out of range. On most of the cases the ignition switch contacts are burned out, and this will cause a voltage drop on the contact so the signal getting to the BCM is going to be lower than usual so it will be out of range. Take your ignition switch out (if you don't know how send me your e-mail (believe me I'm not looking for e-mail addresses I just need to scan the instructions, since I have them only printed out) and I'll send you detailed instructions for free. Once the switch is out remove the cover on the back of the switch (it is clipped on, all you need is a flat head screwdriver). Once the cover is removed you should see 5 fairly big electric contacts. I bet at least one or two are burned out. Clean them with fine sand paper until their surface is clean and flat and make sure the steel springs pressing the contacts together are tight and are pushing the contacts firmly. If not, using pliers bend them to get good contacts. Reinstall the switch and your car should start every time. If the contacts are really bad you might have to change the ignition switch.
I know dealers want to change every part on the car so please do not let them change the passlock sensor. The passlock sensor is a hall sensor and there is no reason for the sensor to go bad.
CF Beginner
Joined: Sep 2010
Posts: 1
Likes: 0
ok first off changing the ignition switch and tumblers will do absolutely nothing sorry if you have already done this. there are three main components to the passlock II system the passlock sensor, the BCM, and the Ecm and of course the wiring in between. Odds are if this keeps happening and there is no other problems such as door locks freaking out trunk release just goin off then it's not the bcm if you do the relearn feature and it works the it is also not the Ecm. so you are left with the 3 wires that run from the bcm to the passlock sensor.odds are the passlock sensor is bad. now there are two solutions either go to the dealer and have the sensor replaced or bypass the system for good. any respectable mobile electonics installer should be able to do this no problem it takes me about 20 mins and i personally charge 40 dollars to do so hope this helps also if you are mechanically inclined in electronics i can send a diagram on how to bypass it yourself hope this all helps
CF Beginner
Joined: Sep 2010
Posts: 1
Likes: 0
I too need help bypassing the passlock system, or just how to clean the corroded terminals. (same intermittent start issue that GM wont recall)
Impalla 2004
dicker31@msu.edu
Impalla 2004
dicker31@msu.edu