How do you disable passlock 1 on 96' sunfire gt?

Answer 1

You can do this without adding a remote starter.

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.

CAUSE

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.

CORRECTION

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.

PASSLOCK MODIFICATION

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://64.85.6.118/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 position (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

modification wiring.

SWITCH OPERATION

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.

NOTICE

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.