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Oldsmobile Alero, Sedan
#2737 of 3014 Passlock I or II Disablement
Jan 30, 2006 (4:21 pm)
I'm a newbie here-- I forgot to title my last post--- Forgive Me.
Here is some information that may help some of you. The initial link is to a bulletin from GM Engineering as it applies to GM Fleet Trucks and Vans. Following that, there is a re-write of the same bulletin so that we can apply it to GM cars. I used this Modification on my 2002 Oldsmobile Alero as a Permanent Disablement of Passlock.I did not install a remote starter. It works great.
PASSLOCK I or II DISABLEMENT
The following is a procedure to disable Passlock I or II Systems for vehicles in which remote start/stop system installations are required. This procedure is required because a remote start system will not function with the current Theft Deterrent System (Passlock) which is included on many 1996 and up GM vehicles.
Please note that this modification is intended to be used only in conjunction with the installation of a remote start/stop system and does not provide a procedure to install a remote start/stop system.
If an attempt is made to start a vehicle by a means other than a key rotation in the ignition switch, the Body Control Module (BCM) will interpret this start as a vehicle theft and disable the fuel injectors.
A minor wiring modification may be made to allow the vehicle to be started remotely. This modification includes adding a switch to allow the customer to select “ON” to allow remote starting or “OFF” for normal Passlock operation.
CAUTION: When this modification is performed and the switch is set to the ON position, the theft deterrent feature will be disabled. When the theft
deterrent is disabled the SECURITY/THEFT SYSTEM telltale will light up indicating that the theft deterrent system is NOT functioning.
Refer to appropriate GM service manuals and/or SVMQP Electrical Guideline Manual for instruction on splicing and electrical connections.
1. Select a suitable on-off switch (see note below) which will be used to disable/
enable the Passlock System. Mount the switch in a location such that it is
accessible to the driver and will not interfere with normal vehicle operation.
NOTE: This is an extremely low current circuit (approx. 7mA), it is therefore very important that a high quality, low energy, fast acting switch be utilized
for this application.
2. Turn the ignition switch to the OFF position.
3. Locate the Main Ignition Switch Harness in the Column. GM's Passlock System wires exit the Ignition Switch Tumbler together and then join with the Main Ignition Switch Harness. (See http://www.bulldogsecurity.com/ or http://188.8.131.52/diagrams/diagrams.asp and select your Make, Model and Year for wire colors and clues on the quickest way to access these wires.)
4. Locate the Yellow Passlock Data Wire which is included in a bundle of three tiny (20 GA) wires wrapped in friction tape.
Cut this wire and splice a 0.5mm2 (20 GA) yellow wire to each end of the cut wire.
Keep wire length to a minimum. Route modification wires clear of moving parts.
Connect the yellow wires to the switch such that the contacts are OPEN when the switch is in the ON position.
5. Turn modification switch to the OFF postion (contacts closed).
6. Start vehicle to verify normal operation. If engine “cranks but will not start"
recheck the switch position (contacts should be closed), wire connectors and
To enable remote start:
Start the engine with the ignition key (modification switch must be in the OFF
position). Turn modification switch to the ON position (contacts open). The
SECURITY/THEFT SYSTEM Telltale will light up indicating that the Passlock System is inoperative.
Once the SECURITY/THEFT SYSTEM telltale has been on for at least 5 seconds the vehicle can be turned off and then remotely started.
To disable remote start:
The Passlock System can be reactivated by turning the modification switch OFF
(contacts closed). Vehicle can either be running or off when this is done.
Please note that the VCM/PCM will record Diagnostic Trouble Codes (DTCs) related to the security system when the modification switch is in the ON position (circuit open). This is due to the way that the VCM/PCM interprets this condition.
Any condition which removes battery power from the Vehicle Control Module/Powertrain Control Module (VCM/PCM) (e.g. dead battery, disconnected harness connectors, etc.) will prevent the vehicle from being restarted. If the engine exhibits a “cranks but will not start” symptom, place the modification switch in the OFF (contacts closed) position. This will reactivate the Passlock System and allow the vehicle to be started with the ignition key.
Proud Member of The Anti-Passlock Club
#2738 of 3014 Re: Passlock I or II Disablement [raycorri]
Jan 30, 2006 (5:05 pm)
Good info. I remember reading about Alero and Grand Am starting problems where the security light comes on. The dealer fix is to replace the ignition switch at a very expensive price. I wonder if this is a way around the expensive repair if you are faced with this problem.
#2739 of 3014 Re: 2001 olds alero , Just bought one. Would like for it to run though!
Jan 31, 2006 (8:55 pm)
I just purchased a 2001 Olds Alero. When the delivery driver attempted to drive it on to the truck he noticed it would crank and then instantly die. The fuel gauge was below empty so he figured it was out of fuel and winched it on to the car carrier. When it was delivered, he put it in neutral and rolled it off of the carrier. I got in, started it up and pulled it into the driveway. About 10 minutes later, I drove it around the block and it ran great. I parked it in my driveway and went back to work. I was working out of town and the car sat in the drive for two days. When I went to start it the car cranks and dies instantly. Fuel gauge is once again below the "E" mark and doesn't move when you turn the key though I put 5 gallons into it. I can hear the fuel pump when I turn the key (1/2 way) Is this the fuel sender, fuel strainer, fuel pump, a combination of the three? something else?
#2740 of 3014 Re: Passlock I or II Disablement [mikey00]
Feb 02, 2006 (5:49 pm)
Yeah, that's exactly why I posted this. A lot of people have just cut the yellow data wire while the engine is running to trigger "fail -enable" mode. That's exactly what the Modification On/Off toggle switch does. The added benefit of the switch is so you can reset the Passlock in case the Battery goes dead and clears the SECURITY/THEFT SYSTEM alarm light.
Proud Member of The Anti-Passlock Club
#2741 of 3014 Re: 2001 olds alero , Just bought one. Would like for it to run though! [schafer1]
Feb 03, 2006 (8:59 pm)
This is really throwing me for a loop. Last night I attempted to start the car with the same result. Tonight I got in, turned the key, and it cranks right up and doesn't die. Shut it off and cranked it again 5 or 6 times. I realized tonight that when I turned the key not only does the fuel gauge work properly but all of the dash lights come on which doesn't happen when you turn the key and the fuel gauge doesn't move.
#2742 of 3014 Re: 2001 olds alero , Just bought one. Would like for it to run though! [s
Feb 04, 2006 (10:36 pm)
From reading your posts, it sure sounds like the ignition switch is intermittent.
#2743 of 3014 Olds. Alero 99 Users Manual
Feb 13, 2006 (4:14 pm)
I'm a new on this issue. Looks great. A lot of tips for non-experienced people just like me.
My question is about Alero user's manual. I got my car without this, and I'm looking for this because there are some tips we can get there.
Could you please help me with that?
Thanks in advanced.
#2744 of 3014 Re: Olds. Alero 99 Users Manual [mtoquinto]
Feb 13, 2006 (5:57 pm)
It's on the Oldsmobile website.
#2745 of 3014 Turn signal problem - again!
Mar 02, 2006 (6:25 am)
We have problems with our 2002 Alero. We have had the recall done for the hazard warning problem. But now, the flasher unit keeps clicking at a very fast rate when neither the turn signals or hazard warning lights are switched on. Inevitably, it is intermittent, but is certainly getting worse. It is only the clicking noise that is apparent, as none of the turn signal lights come on when it makes this noise.It sounds as if the clicking is coming from the hazard warning light-switch.
Can anyone advise what is wrong please?
#2746 of 3014 Re: Olds. Alero 99 Users Manual [mtoquinto]
Mar 02, 2006 (6:32 am)
In addition to the suggestion already posted. Haynes manuals do not publish a manual for our model (we have a 2002 3.4 GL1). However, I purchased the closest they do, which covers up to 2000 models and includes the majority of things I need. However, it also includes the Malibu,Cutlass and Grand-Am. So, some of the pictures refer to these and not the Alero. But, for general work, it is better than nothing. And, with the other suggestion on this board, it may help. The ISBN is 1 56392 361 0. Their phone number is 1-805-498-6703. Use the ISBN, and check Amazon and E-bay. Hope this helps.